One of the first go-to modifications for the 2000, 2006 Toyota MR2 Spyder, MR-S, Roadster 'ZZW30', ridding the exhaust system of the factory manifold with pre-catalytic converters, which are known to cause engine failure and the power/torque increase is really significant.
Estimated power increase of ~10+hp with no other modifications, working in conjunction with stock or aftermarket engine management. A bolt-on solution, with no adverse affects to the OBD-II system. No other modifications needed for install. Will fit any stock or aftermarket muffler designated for the MR2 Spyder.