This is the exhaust we designed for our V8 conversions. It's a true dual exhaust setup that uses a custom-made muffler that is effectively a pair of mufflers with an internal crossover pipe. A set of headers specifically built for V8 Miatas is also part of the system, and it includes two high-flow metallic core catalytic converters that will keep OBD-II systems and emissions testers happy without a cost in output. This is a complete system from exhaust ports to tailpipes.
As with all of our exhaust systems, this is bent out of stainless steel using a CNC bender for minimal welds and maximum accuracy. The entire system is made of stainless steel and carries a lifetime warranty. The cats have a 5 year/50,000 mile warranty on the shell and a 25,000 mile warranty on their emissions ability. Please note that we cannot ship this product to California as the cats are not CARB approved.
Available for all NA, NB and NC Miatas using V8Roadster subframes and the CTS-V Getrag diff. Will probably not fit other applications. The NC version is currently not available. The ND version is listed separately.
You can hear it running at the beginning of this video. We are working on better videos for sound.