OBX High Flow Test Pipe 2007+ Mazda speed 3 2.3L Turbo
Fit For All  2007+ Mazda speed 3 2.3LReplacing the Cat-converter with a test pipe can dramatically increase exhaust air flow. A test pipe is a replacement for the factory catalytic converter. OBX test pipe will work with the OEM exhaust as well as any exhaust that would keep the factory catalytic converter. Increase Torque And Horse Power, Great Turbo Spool Up And ResponsePipe Dia : 3.0" OD , 3/8 " Flange Thickness .