Catalytic Bypass 993 Bischoff/Gillet * no longer available*

Sport Catalytic Bypass- Fits Both Bischoff and Gillet Systems_x000B__x000B_Improve sound and performance by decreasing exhaust backpressure. _x000B__x000B_An ECU upgrade will be necessary to avoid a check engine light._x000B__x000B_IF YOU HAVE A U.S. MODEL, PLEASE NOTE: This part will only work on U.S. 1995 OBD 1 Cars. This will not work on U.S. spec cars from 1996 upwards as they are OBD II. Please verify if your 993 is a OBD I or OBD II car prior to ordering._x000B__x000B_