Motorcycle Repair: EFI twin cam, air fuel ratio, gas mileage

Question
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Followup To
Question -
I have a 2004 Fat Boy with EFI. I had the dealer installed map download and the hi po air cleaner installed along with a pair of Sceamin Eagle slip on mufflers when I bought the bike. I now want to put a set of Vance and Hines Big Shot pipes on the bike. Will I have to do anything different to the EFI system to make the bike run right? I also would want to run them with the baffles out if possible. Thanks! Brett
Answer -
Hi Brett
If you install that JUNK Vance and Hines Big Shots dont EVER expect the bike to run right no matter if God tunes it himself. They are the worst pipes next to Samson crap. You may not like what I told you but it is the TRUTH. Johnny

OK so no Vance and Hinnes! What do you recommend and what if anything will I have to do after installing the new pipes? Thanks!  Brett

Answer
I would install a set of Cycle Shack PHD series 2" duel exhaust system, Then a Power commander USB and have it dynoed tuned on a dynojet 250 load contoller dyno with a air/fuel ratio monitor. This will really make the bike run great and your gas mileage will pick up also.  Johnny