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