I bought the Busher 3" tb exhaust. I had a hard time getting the 02 sensor installed without it hitting against the floor pan of the car. If i turned it down then that put everything else off. I eventually air hammered the floorpan to make room but it is still close. Is there a better way. Also, my service engine light is on. It seems to still run ok but is there a fix for this. Does someone make a 02 simulator for the Evo. I still think the car does not run the same with the computer sees this code