Was wondering if anyone had any experience concerning replacing a cat with a straight through 3" pipe that will connect to a 3" exhaust? The downpipe in question has a two lambada sensors either side of the cat to feed info through to the ECU. The ECU has been remapped to a stage
1 and the car is a 96 Saab NG900 FPT currently producing 225 bhp. I have done a little research and there might be an issue concerning the second 02 sensor after the cat. It seems i might get a CEL reading on my SID if the ECU expects a second O2 sensor to produce a meaningful signal. I can think of a few ways to get better spool up but i was wondering if anyone had tried it. The car will be used off road and boost preasure can be adjusted for the lack of back preasure in the exhaust.
Cheers John