i have a 1992 Cav (K-Reg) and when i bought it they guy had put that full decat SS exhaust on it, does my car need a CAT on it to pass, i was told it depends on wether the manifold has a sensor plugged into it
Pre august 92(J) vehicles dont require a cat and only have to pass a two gas test. August 92 onwards (K) requires a BET test, if failed it goes on to a full cat test. In short you need a cat and O2 sensor.
most cars up to 95 will get away with a 2 gas test if you don`t put the engine code in on the mot computer , it will come out on the vt40 as co 3.50% , hc 1200 ppm , so i wouldn`t fail it for no cat , a lot of cavs had a carb anyway on a k plate .