Tomei EJ255-EJ257 Unequal-Length Header for Single Scroll Head Kit includes clutch disc

Kit includes clutch disc

2015-2021 WRX STI with VAB/VAF chassis codes

These heads are a great option for you basic bolt on engines up to 575 BHP

Up to 1kHz per channel with a maximum total sample rate of 100kSamples/s when using ECU Logging

at equal timing and consistency

Tomei EJ255-EJ257 Unequal-Length Header for Single Scroll Head Kit includes clutch discHigh Efficiency 4 1 Type We introduced the high efficiency 4 1 as against the STD 4 2 1. The exhaust efficency of the standard exhaust manifold is not perfect. But Tomei 4 1 type exhaust manifold has high efficency. You could see the change of dramatically driving feeling. Not Equal Length Design The complete equal length is good for the exhaust intervention but reduce the turbine performance and increase the exhaust resistance. Contrary to that, the