Tomei EJ255-EJ257 Unequal-Length Header for Single Scroll EZ30/EZ36 Internals 2 x Digital inputs

2 x Digital inputs

Open and Closed Loop Boost Control plus most Motorsport features including Full Gear Shift Control

5 different 17-7 precipitation hardened springs for further adjustment of boost levels

Fully shot peened

The Outfront Motorsports 775 Pocket Ported Cylinder Heads are the perfect performance head upgrade for the weekend racer

Tomei EJ255-EJ257 Unequal-Length Header for Single Scroll EZ30/EZ36 Internals 2 x Digital inputsHigh 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