AWD Buyers Guide - Turbo Magazine

Today's all-wheel-drive enthusiast has it made. Like the mid-'90s Honda fan, nearly every automotive want of the Mitsubishi EVO and Subaru WRX and STi owner is satisfied. Wheels? Yep. Coilovers, anti-sway bars and strut braces? Of course. Boost controllers, fuel pumps, seats and body add-ons? You bet. Turbo and intercooler upgrade kits and engine management systems? Just look around, they're everywhere.

The decision to offer Mitsubishi's Evolution and Subaru's high-end Impreza in the U.S. meant different things to different people. To Mitsubishi and Subaru, it meant bigger profits. To sport compact enthusiasts tired of the sub-200hp FWD platform, it was a godsend. To the aftermarket high-performance industry, well, it meant that a whole new crop of cars was about to emerge, ones with enormous potential given the right tweaks. Tweaks like turbocharger upgrade kits, front-mount intercooler conversions and stand-alone engine management systems. Behold, the definitive AWD turbo kit, intercooler kit and engine management buyer's guide - if you don't see it here, it probably doesn't exist.

AVO Turboworld STi Turbo Upgrade: AVO's big ball bearing, water-cooled, turbocharger for the WRX and STi is a true bolt-on application. Based on their Edge Series design, these turbos are designed from the ground up with improved reliability, performance and response in comparison to OEM units. Included is the famous AVO 15psi adjustable boost actuator, which provides better boost response and maintains consistent boost at higher engine speeds. AVO turbochargers are designed to perform in the harshest conditions and are tested accordingly; each turbo is built to standards exceeding OEM requirements. High-nickel content housings ensure AVO turbos go the distance. AVO turbos are built off of lightweight Garrett compressor and turbine wheels, with knife-like edges for unmatched spooling, yet built strong for reliability. These AVO turbochargers are likely to outlast your engine. AVO offers several variations ranging in sizes from the quick-responding AVO380 that flows 44lbs/min all the way up to the AVO550 that flows as much as 55lbs/min. www.avoturboworld.com

AEM FIC: AEM's Fuel Injector Controller gives users with OBD-II EVOs, WRXs and STis the ability to control ignition timing and fuel delivery without the need for make-shift devices or more expensive stand-alone units. This system works alongside the factory ECU, preventing tuning limitations due to complex factory timing patterns, without so much as causing a check engine light to appear. www.aempower.com

AMS Performance EVO Front-Mount Intercooler Kit: AMS now offers the same intercooler kit used on their own 8-second, 1,000+hp drag car for the EVO VII-IX. If you're putting out over 600 hp, you need the AMS Race Intercooler to lower your intake air temperatures and reduce pressure drop. The kit features a massive 22x12.4x4-inch bar and plate intercooler core that's radiused at its inlets and outlets for smoother airflow and includes polished 3-inch upper and lower intercooler piping designed to bolt up to the AMS VSR Intake manifold. The system is also pre-flanged for TiAL blow-off valves and provides strapping at the inlet and outlet to prevent piping from blowing off at high boost levels. www.amsperformance.com

AMS Performance EVO GT35R Turbo Kit: AMS' most popular turbo kit is based off the Garrett GT35R dual ball bearing turbocharger and fits the EVO VII-IX. The AMS lifetime warranted 304 stainless steel, tubular header and collector promote quick spool-up (3,600-4,200 rpm) and produce maximum power allowing users to take full advantage of the hefty turbo. The GT spools up slightly later than the stock turbo but offers 400+hp potential on 93-octane fuel. More than 650 hp is achievable on race gas. The kit includes a 3-inch stainless steel tubular oxygen sensor housing and downpipe, a recirculated wastegate dumptube paired with a 38mm TiAL wastegate, one-way locking washers to prevent the oxygen sensor housing bolts from backing out, a high-flow slim line fan, and all necessary hardware, intake tubing, lines, silicone couplers and detailed instructions. AMS also offers kits featuring Garrett GT37R, GT3076R, T3/T4 and GT42R turbos with the latter good for more than 900 hp. www.amsperformance.com

AEM EMS: AEM's plug and play Engine Management System plugs directly into EVO VIII and IX and '02-'05 WRX ECU harnesses and requires no additional wiring or hardware. An integrated tuning wizard allows users to create a base map specifically for a car's configuration, regardless of what type of fuel injectors, sensors, coils or other changes have been made. The AEM EMS's infinitely adjustable software allows tuners to program virtually any combination of engine control, power adders and auxiliary devices, and accurately delivers proper amounts of fuel and ignition timing for any boost level or operating condition. www.aempower.com

COBB Tuning AccessPORT: The AccessPORT is a handheld programmer that allows '02 and up WRX and STi owners to unlock their vehicles' hidden potential by reprogramming the stock ECU. A short and guided installation process helps users upgrade their ECUs from stock to one of COBB's performance-oriented tuning maps. Custom tuning is also provided by authorized AccessPORT ProTUNER centers, or users can upgrade to the StreetTUNER package for do-it-yourself tuning. The unit uses the OBD-2 diagnostic port, and requires no cutting or wiring - simply plug and play. The AccessPORT features "Real-Time" mapping, which allows tuning data changes within seconds. Using COBB's off-the-shelf staged maps, the AccessPORT can unlock the Subaru's potential by as much as 50 hp in short order. The AccessPORT also features on-the-fly map switching; sensor data monitoring; trouble code reading and clearing; performance, metering and so much more. www.cobbtuning.com

AVO turboworld WRX/STi Front-Mount Intercooler Kit: AVO spent countless hours researching and developing the correct cast-aluminum end tanks and piping for their '02 and up WRX/STi front-mount intercooler kits. Each is specifically designed and engineered for maximum airflow and feature a large 595x222x90mm core. The results are no-compromise performance with a quick and easy install process. Major cutting or parts relocation isn't necessary here and that includes the battery and OEM driving lights. Piping to and from the turbo and throttle is kept as short as possible. The design of the high-flow bar and plate intercooler ensures that enough air goes past itself and toward the radiator to help keep engine temperatures down. Heavy-duty Kevlar-reinforced rubber piping and cast-aluminum tubes ensure air continues flowing fast and cool throughout. Smooth bends minimize performance-robbing bottlenecks. At 450 hp, intake temperatures drop by nearly 100 degrees centigrade with only a 1psi pressure drop. Each component is also powdercoated, which ensures the system's longevity. www.avoturboworld.com

Buschur Racing EVO Turbo Kit (cast manifold): Buschur Racing's EVO turbo upgrade kit includes everything EVO owners need to improve their 4G63's factory turbo system. The kit includes a Garrett-based ball bearing turbocharger of choice that ranges from smaller 50-trim units to the larger GT35R, Buschur Racing-produced Ni-resist cast exhaust manifold, TiAL 44mm wastegate, stainless steel oxygen sensor housing, low-profile cooling fan, oil lines, gaskets and all the hardware and fittings required for a proper installation. www.buschurracing.com

Buschur Racing EVO Turbo Kit (tubular manifold): The Buschur Racing tubular manifold EVO turbo kit includes everything needed for a proper installation on late model Mitsubishi Evolutions. The star is a Garrett ball bearing turbocharger of choice that can range from the entry level 50-trim on up to the massive GT45R, stainless steel tubular exhaust manifold, TiAL 44mm wastegate, Buschur Racing three-inch downpipe (not shown), stainless steel oxygen sensor housing, low-profile cooling fan, oil lines, gaskets and all the hardware and fittings needed for an installation done right. www.buschurracing.com

Buschur Racing EVO Deluxe Front-Mount Intercooler Kit: Buschur Racing's front-mount intercooler kit requires no cutting or modifications to the vehicle other than minor trimming of the front lower splash shield. The core is rated for 750 hp with a minimum pressure drop of only 0.84 psi. The core is also rated to flow at 1,125 cfm with dimensions measuring in at 24x10.5x3.5 inches. The end tanks and the routing of the intercooler plumbing are what sets this intercooler apart from other kits on the market. Buschur Racing was able to save 20 inches of intercooler plumbing length and five bends from the lower intercooler plumbing alone. This, in conjunction with their upper intercooler pipe kit (sold separately), saves 11 bends and a total of 36 inches in comparison to the OEM intercooler plumbing. Less bends, less restriction, more power. www.buschurracing.com

GReddy EVO and WRX Turbo Upgrade Kits: Factory turbocharged vehicles like the EVO and WRX have enormous power potential but fall short when matched with their OEM turbochargers. Big gains can be found by upgrading the exhaust, intake, blow-off valve and intercooler and adding more fuel and boost, but by replacing the stock turbocharger with a properly sized GReddy turbo upgrade kit, owners can experience new levels of power. Kits are available for the EVO VII-IX as well as the '02 and up WRX with kits ranging from mild to race-ready. Depending on application, kits either bolt onto factory manifolds with internal wastegates or use handmade SUS manifolds and external wastegates. EVO systems feature either TD06S 20G, T67 25G or fairly large TD06SH 25G turbochargers. WRX owners can choose from GReddy's T518Z, TD06S 20G, T67 25G or TD06SH 25G. Kits include stainless steel tubular manifolds when applicable, Airinx filters, GReddy external wastegates and all hardware, plumbing and fittings needed for a professional installation. www.greddy.com

GReddy EVO and WRX Turbo Upgrade Kits: Factory turbocharged vehicles like the EVO and WRX have enormous power potential but fall short when matched with their OEM turbochargers. Big gains can be found by upgrading the exhaust, intake, blow-off valve and intercooler and adding more fuel and boost, but by replacing the stock turbocharger with a properly sized GReddy turbo upgrade kit, owners can experience new levels of power. Kits are available for the EVO VII-IX as well as the '02 and up WRX with kits ranging from mild to race-ready. Depending on application, kits either bolt onto factory manifolds with internal wastegates or use handmade SUS manifolds and external wastegates. EVO systems feature either TD06S 20G, T67 25G or fairly large TD06SH 25G turbochargers. WRX owners can choose from GReddy's T518Z, TD06S 20G, T67 25G or TD06SH 25G. Kits include stainless steel tubular manifolds when applicable, Airinx filters, GReddy external wastegates and all hardware, plumbing and fittings needed for a professional installation. www.greddy.com

GReddy e-Manage Ultimate: GReddy's e-Manage Ultimate is as close to an expensive stand-alone engine management system you can get but without the price. The Ultimate works with the OEM ECU and sensors and can alter factory settings without tuning from scratch. The Ulimate is application specific and includes the EVO IV-IX. The system controls fuel and ignition parameters and features data logging, map tracing and sensor monitoring for quick and easy tuning. In addition to standard e-Manage airflow-based adjustments, the Ultimate includes new features like parameter set up and map control. An externally mounted toggle switch allows users to switch between preset maps. Maps for individual cylinder adjustment for both fuel and ignition are included and an airflow output map option allows for airflow meter elimination. The unit can also self-tune when accompanied with a wideband air/fuel meter. There are also built-in boost, rev and speed limiter-cut features and various fine-tuning correction maps to adjust for throttle acceleration, vehicle speed, water temp, intake temp, idle and more. www.greddy.com

HKS WRX GT Sport Turbo Upgrade: HKS offers its off-road use, bolt-on, GT-RS kit for the '02 and up WRX. The kit features the same straight-through downpipe, up-pipe and Super Mega Flow Intake as previous kits, but the GT2540R turbo has been replaced with the GT-RS and the split housing extension is now manufactured from polished SUS304 stainless steel. The ball bearing GT-RS turbo's outstanding power potential and responsiveness is an excellent match to the WRX's flat-four, boxer engine design. This GT Sport Turbo Upgrade combined with an HKS Hi-Power exhaust, EVC, F-Con S and larger injectors produced 246.3 whp and 203.6 lb-ft of torque, according to HKS. These figures were achieved with boost pressure set to 1.0 bar. The kit requires the use of an HKS SSQV blow-off valve kit, sold separately. www.hksusa.com

HKS EVO, WRX and STi Intercooler Kits: HKS intercoolers can improve the efficiency and power on the EVO VIII-IX, '02 and up WRX and '04 and up STi by rapidly reducing compressed intake air charge temperatures. The tube and fin design dissipates heat without creating boost pressure losses or lag. As pressurized air is channeled through the core's internals, cool air rushes through the front where the tubes' external radiating fins draw heat out. This decreases the likelihood of detonation and maximizes power output by increased air charge density. Boost response and airflow are also improved due to the larger flow capacity and cooling efficiency. HKS' EVO R-Type intercooler kit features a 600x302x97mm core matched with polished aluminum piping and end tanks. The WRX and STi S-Type intercooler kits feature 600x244x65mm cores, also with polished piping and end tanks, and include Super Mega Flow intake assemblies. All necessary silicone hoses, brackets, hardware and fittings are included for a bolt-on installation. Subaru kits require the addition of HKS SSQV blow-off valve kits. www.hksusa.com

Injen EVO Intake and Intercooler Piping Kit: Injen Technology's SP1898 is a cast-aluminum air intake system complete with intercooler piping. It features Injen's patent pending Mega Ram Technology process that retains factory air/fuel ratios. It can also produce gains of up to 33 hp and 25 lb-ft of torque. Pair it with Injen's larger, more efficient front-mount intercooler (SES1898ICC) and achieve the necessary cooling that your EVO demands. www.injen.com

Injen WRX Intercooler system: Injen Technology's SES1202FMGT allows Subaru owners to replace their miniature top-mount, heat soak-prone intercoolers with a massive track-proven front-mount system. Measuring in at 24x12x3 inches, the Injen front-mount intercooler will support over 800 hp. Best off all, Injen's SES1202FMGT with full intercooler piping will maintain the factory's quick spool-up times Subaru owners have grown to love. www.injen.com

HKS EVO Full Turbo Upgrade: HKS introduces its GT2835/GT3037S Full Turbo Upgrade kits for the EVO VIII and IX. HKS' years of building record-breaking Time Attack and Champion Rally 4G63-powered EVOs led to the development of these upgrades. The HKS GT2835 Full Turbo Upgrade Kit - combined with an R-Type Intercooler Kit and HKS 272-degree intake and exhaust camshafts, Carbon Ti-exhaust, 640cc injectors, Racing Suction intake, EVC, Racing Catalyzer and tuned with an HKS F-Con - produced 330.4 hp and 285.4 lb-ft of torque at a 1.24 bar as measured on an EVO VIII. The GT2835's ball bearing center-cartridge and 0.73 A/R turbine housing allows quick boost buildup for exceptional response, while the 56-trim compressor wheel offers superb power potential for the 4G63 powerplant. Kits include either a GT2835 or GT3037S ball bearing turbocharger, SUS304 stainless steel turbo exhaust manifold, polished SUS304 downpipe, stainless steel Racing Wastegate, polished turbo exhaust manifold heat shield, intercooler piping and are available for systems that are factory intercooled or feature the HKS R-Type Intercooler Kit. www.hksusa.com

Power Enterprise EVO RX6R Setup Pro Turbo Kit: The RX6R kit, designed for the EVO IV-IX, is based off a compact ball bearing turbocharger capable of well over 600 whp. The exhaust and compressor housings can be separately selected and matched per engine specs. The RX6R kit fits EVOs with stock intercoolers by fabricating inlet and intercooler piping. The Setup Kit consists of the RX6R turbo, stainless exhaust manifold, outlet pipe and front pipe, wastegate valve, oil lines, gasket set, installation guide and hardware. Four different sizes of compressors are offered and six types of exhaust housings to make the most suitable turbo unit for your setup. The kit adopts a 76.3mm diameter exhaust front pipe, which is designed to spool the turbine quicker by reducing exhaust backpressure. Another clever feature is returning the exhaust gases out of the wastegate back into the front pipe, instead of releasing such gases directly into the atmosphere. Exhaust manifolds are also heat-treated for durability and strength against cracks. www.powerenterpriseusa.net

Power Enterprise WRX/STi RX6R Setup Pro Turbo Kit: Power Enterprises' WRX and STi turbo kits are rated up to 550 whp depending upon compressor and exhaust housings. Power Enterprise, the largest IHI turbo distributor in the world, offers the RX6R kit for both the EJ20 and EJ25 engine applications. Kits include the RX6R turbo using an external wastegate system with ball bearing technology to support the turbine shaft in longitudal and axial directions for superior boost response at all rpm ranges. Subaru owners can customize the kit from four different types of compressor housings and six types of exhaust housings to make the most suitable turbo kit for their needs. All kits use a large diameter front exhaust pipe, which is designed to reduce exhaust gas backpressure and reroute spent wastegate fumes back into the system, reducing both noise levels and pollution. The kit consists of RX6R turbine, stainless steel exhaust manifold, front pipe, external wastegate, oil lines, fasteners and gaskets. The kit requires removal of the catalytic converter. www.powerenterpriseusa.net

Spearco WRX/STi Intercooler Upgrade Kit: Spearco's '02 and up WRX and STi intercooler kit features the largest air-to-air top-mount intercooler on the market. Utilizing the factory mounting points, the massive 4.5-inch-thick unit bolts on easily without any modifications to the vehicle. The factory turbo piping and blow-off valve can be bolted on easily with standard hand tools. The massive 1,000cfm intercooler offers a very low pressure drop and extremely low charge temperatures. Dyno results have shown performance improvements of up to 15 hp when compared to the stock intercooler. This kit comes complete with clamps and silicone hoses. Boost pressure can now be increased without the horsepower robbing effects of the extreme charge temperatures normally associated with compressed intake air. www.turboneticsinc.com

Turbonetics WRX/STi Blow-Off Valve Kit: Turbonetics' Raptor blow-off valve/bypass valve kit includes all necessary mounting hardware, silicone hoses and adapter flanges needed to upgrade the Subaru WRX's factory bypass valve. The unique proprietary blow-off/bypass valve design allows boost pressure to be vented into the atmosphere without the need for recirculation. The kit also includes a discharge horn to provide the infamous in-between-shifting sound. The new large valve compared to the stock bypass valve allows the vehicle to be more responsive between shifts, preventing compressor surge. www.turboneticsinc.com

Blitz Performance WRX Turbo System: Blitz Performance and Triple K Turbo of Germany have collaborated to produce one of the best turbos on the market. Together, Blitz and Triple K have exclusively designed specific turbos for certain applications, including the '02 and up Subaru WRX, that produce maximum power with maximum boost response. The included Blitz wastegates are engineered to have precise boost control and the ability to withstand extreme heat conditions. Included in all Blitz Turbo Kits are all necessary hardware, manifold, turbo, turbo-outlet pipe, wastegate dump-tube and wastegate - helping mark Blitz Turbo Kits as the most complete and cost effective kits on the market. www.blitz-performance.comCaption32

Spearco EVO Intercooler Upgrade Kit: Spearco's direct bolt-on high-performance intercooler upgrade for the EVO VIII-IX features the same W.A.V.E. technology as used on many high-horsepower race cars. This intercooler is also the largest intercooler you can fit without any modification or cutting to the vehicle. All factory-mounting brackets are retained. Computer modeled round end tank design and center air inlet and outlets provide maximum boost pressure distribution, thus increasing cooling efficiency and dramatically reducing pressure drop. The W.A.V.E. Technology core is capable of dropping temperatures by as much as 220 degrees F. Kit includes all parts such as heavy-duty T-bolt clamps and silicone hoses needed for installation. www.turboneticsinc.com

Blitz Performance EVO and WRX LM Intercooler Kits: Blitz intercooler kits are designed per vehicle with efficiency and performance in mind. All Blitz intercooler kits come with aluminum piping and all the necessary hardware. Intercoolers provide more power and reliability to any turbocharged vehicle by dissipating heat from the intake charge. During intense driving, the turbo's compressor wheel heats up, as a result, compressed air is forced through the turbocharger. Such conditions reduce the density of the charge air, increasing the chance of detonation and reducing power output. Blitz intercoolers are designed to provide maximum cooling capacity while allowing for minimal pressure drops of only 0.05kg/cm2 at 1.2kg/cm2 boost. Blitz intercoolers are designed to flow considerably more air than OEM issue by consistently and rapidly drawing heat away. With its tube and fin design, a much greater cooling effect is achieved, thermal stresses are relieved and more power is made. Applications include the EVO VIII and IX and '02 and up WRX. www.blitz-performance.com

WORKS P2 Brain Flash: WORKS engineers have been disassembling US-Spec EVO code since 2003 and now offer the P2 Brain Flash for the EVO VIII-IX. The Brain Flash is an ideal way to gain power without sacrificing efficiency or reliability. A true plug-and-play system, the Brain Flash is a reprogrammed factory ECU - not a piggyback - accompanied with WORKS software used to optimize maps including air/fuel ratios and ignition timing. The Brain Flash also features boost control that eliminates the factory boost taper at upper engine speeds. This negates the need for any boost controllers. This proprietary system represents a tried-and-true, reliable design that takes the safe factory system one step further. The P2 includes the unique WORKS Boost Hose Assembly, which allows modification to the wastegate solenoid ECU maps. Expect peak gains of 20+ hp but more importantly a broad, usable, power curve with smoother drivability and improved mileage. Redline limits are raised to 7,800 and a two-step launch control system is also incorporated. www.worksevo.com

Motec M800 EVO ECU: Motec Systems' M800 offers a true plug-in solution for the EVO IX. The M800 replaces the factory unit within the stock Mitsubishi enclosure and allows those who wish to forgo the installation of a vehicle and application-specific wiring harness the ability to work within the confines of the stock wiring harness. Based on the same championship-winning technology associated with previous Motec ECUs, the M800 is unparalleled in performance and reliability. One key feature is its true 32-bit microprocessor with next generation time co-processor to get the job done quickly. The M800 delivers maximum tuning, flexibility and complete control of factory-managed functions, including Mivec. Upgrades such as wideband Lambda, logging, pro analysis and advanced functions can be activated at any time. Anti-lag can be enabled as part of advanced functions as well, which include launch control and gear change ignition cut for full throttle shifts or it may be nominated as a stand-alone upgrade. Software (including new revisions) is free. www.motec.com

XS Engineering WRX/STi Power IC System: The WRX/STi has a special need for an improved intercooler as its factory unit sits directly on top of the engine and turbocharger. Heat soak is a fact of life with this setup. So much so, in fact, that the factory intercooler becomes completely ineffective under extended hard driving conditions. Thus, the need for maximum heat rejection is a must on modified Imprezas and the XS Engineering Power IC upgrade satisfies this need as it provides quick and efficient heat dissipation with minimal pressure drop. In fact, gains over 35 whp are not uncommon on a stock engine STi using 91-octane pump gas. This bolt-on high-performance intercooler system includes lightweight, mandrel-bent aluminum hard pipes, all necessary fasteners, silicone connectors and even a new OEM Denso reservoir tank. What also sets the Power IC apart, is the carefully selected tubing diameters that have been proven to cause zero losses in turbocharger response. www.xs-engineering.com

A'PEXi Power FC: The A'PEXi Power FC is a full computer unit that replaces the OEM ECU with a user-programmable unit. With features like 20x20 resolution for fuel and ignition timing, data logging capabilities, Mivec control (where applicable), injector pulse correction (for larger injectors) and the ability to omit your restrictive or maxed-out airflow meter at your discretion. Whether your project is an EVO, WRX or STi, the Power FC can handle it all. www.apexi-usa.com

XS Engineering EVO Power IC System: EVOs are known for their ability to operate at high-boost levels so a high performance intercooler is a necessity. The XS Engineering Power IC satisfies this need for EVO VIII and IX owners as it provides quick and efficient heat dissipation with minimal pressure drop. It has been tested to provide an additional 48.6 degrees F decrease in air intake temperatures when compared to the factory intercooler. This kit is a direct bolt-in replacement for the factory intercooler and comes with all the necessary hard pipes, brackets, fasteners and silicone hose connectors. www.xs-engineering.com

Hydra EMS Nemesis 2.5: The Nemesis is Hydra's latest evolution in plug-and-play standalone engine management systems for the EVO, WRX and STi. It offers users plug-and-play technology, without sacrificing performance enhancing capabilities or the safety net of OEM engine management systems. Users can develop customized maps for closed-loop intake and exhaust cam timing, therefore optimizing performance for varying conditions. Unlike other parallel engine management systems that utilize the factory ECU to control the drive-by-wire throttle, Nemesis 2.5 has built-in drive-by-wire control for the drive-by-wire throttle body. One of the great features of the Nemesis 2.5 is the ability to switch between three different sets of fuel and ignition maps on demand. It allows its users to switch to a different map for race fuel, pump fuel and a safe map for areas where good quality pump fuel is just not available. The Nemesis 2.5 software runs on the Windows platform and all critical parameters are displayed on-screen in real-time. www.hydraems.com

A'PEXi EVO Isamu RX6 Full Turbo Upgrade: The A'PEXi Isamu RX6 Turbo Upgrade Kit for the EVO VIII and IX features an IHI RX6 ball bearing turbocharger that doesn't compromise low-end responsiveness for top-end power gains, A'PEXi external racing wastegate and handmade SUS304, TIG-welded, stainless steel exhaust manifold. A new downpipe and charge piping are included as well as all plumbing and hardware needed for the install. www.apexi-usa.com

Full-Race EVO Vertical Flow Intercooler Kit: Full-Race engineers have developed the Vertical Flow Intercooler Kit to maximize cooling efficiency and optimize heat transfer while minimizing pressure drop on the EVO VIII and IX. Using an innovative and incredibly efficient intercooler core design, charge pipe lengths can be drastically reduced, improving response and minimizing spool time. Power gains of 25-30 whp over traditional front-mount intercoolers can be realized. The Full-Race EVO VerticalFlow Intercooler is compatible with all Full-Race EVO turbo kits, turbochargers and charge pipes to ensure a clean installation and excellent performance. www.full-race.com

Full-Race EVO Twin-Scroll Turbo Kit: Full-Race's EVO Twin-Scroll Turbo Kit is the answer to what EVO enthusiasts want. Full-Race engineers designed the twin-scroll kit from the ground up to have faster response, less lag and more top-end power. The result is an exceptionally responsive turbo system that offers the performance, quality and durability to stand up to the most demanding enthusiasts. Full-Race's textbook kit is available with a wide range of turbos, from the ultra-responsive 530whp capable twin-scroll GT30R to the 750+whp capable GT40R. It retains power steering, A/C and a full-length radiator. Dual 44mm V-band wastegates regulate boost, while the innovative Full-Race Vertical Flow Intercooler cools the charge air efficiently. Full-Race engineers designed ultra-efficient charge pipes to further increase response and spool the turbo earlier. Robotically TIG-welded from eight-gauge forged stainless steel, and sporting a lifetime warranty, the Full-Race EVO kit is available in stock turbo, twin-scroll T3 and twin-scroll T4 turbocharger configurations. www.full-race.com

Full-Race WRX/STi Twin-Scroll Turbo Kit: Full Race is proud to release the highly acclaimed twin-scroll WRX/STi Rotated Mount turbo kit. This innovative patent pending design is proven to increase low-end, mid-range and top-end power for the Subaru WRX/STi. Testing has shown 30-50+whp gains over a single scroll header and up-pipe. Utilizing ideal cylinder pairing, low entry angle merge collectors and the proper implementation of twin-scroll technology, significant power and torque increases across the entire powerband can be realized, while minimizing lag and improving throttle response. Full-Race manifolds are hand fabricated in the U.S. from forged eight-gauge stainless steel, robotically TIG-welded and include a lifetime warranty. Available in stock turbo, twin-scroll T3 and twin-scroll T4 turbocharger configurations. www.full-race.com