Installing an aftermarket roll bar in your Mazda Miata makes the structure of the car more rigid, which tightens handling around corners, but its key purpose is to protect passengers if the car rolls over during an accident. Installing a roll bar in your Miata can be a do-it-yourself project. However, it requires experience working with cars. You must disassemble portions of your interior to install the roll bar.
Raise the Miata rear on jack stands, and remove the rear wheels.
Unscrew the 10-millimeter bolts that fasten the fender liners to the inside of each rear wheel well.
Go to the rear shelf and remove the clips that fasten the carpet, and remove the carpeting entirely. All clips must be removed. These are placed along the circumference of the Miata rear shelf.
Remove the screws that fasten the plastic door sill by using a Phillips-head screwdriver.
Remove the seat belt moldings from both sides of the car.
Remove the aluminum plate located under the rear of the car, in front of the gas tank. It is held on by 10-millimeter screws.
Using tin snips, cut a 3-1/2- to four-inch long slit into the area where the aluminum plate was installed.
Place the roll bar inside the vehicle and perform a test fit. Ensure correct fitment by aligning it with the body and potential mounting points.
Place the roll bar into its final position, and drill each hole for each mounting screw. After drilling the first hole, alternately drill the same hole on the opposite side, continuing this pattern until all mounting points are drilled.
Install washers on to each roll bar mounting bolt, and put each bolt face-down into each mounting hole. Rubber trim on the underside may need to be cut away with scissors to make room for the mounting bolts.
Cut an additional two- to three-inch strip in the area you previously cut with the tin snips. This time, cut at a 90-degree angle, towards the rear of the car.
Align the aluminum plate back into its original position, and reinstall the 10-millimeter screws.
Tighten all roll bar mounting bolts, and reassemble the car interior and fender liners, following previous instructions in reverse order to complete the procedure.
