Tomei EJ255-EJ257 Unequal-Length Header for Single Scroll FA20 Timing Components 2007-2014 WRX and WRX STI

2007-2014 WRX and WRX STI with GR/GV/GH/GE chassis codes

Width: 126 mm

L LENGTH WAGON 1990

3 mm bore size (Same size as an OEM gasket)

Faster communications than G4+ models

Tomei EJ255-EJ257 Unequal-Length Header for Single Scroll FA20 Timing Components 2007-2014 WRX and WRX STIHigh 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