Hi, I have a Jap export 96 Mustang GT, what are the differences in the fuel system?, I have read they have 4 cats fitted to exhaust, Mine has 6?, all Mustangs have 4 o2 sensors, Mine has 2 at front & 2 cat heater probes?, I've fitted a catted Magnaflow x pipe which has caused the Check engine light to come on, I've checked for vacuum leaks (have none), checked for exhaust leaks (have none), been told to fit MIL eliminators (only 2 0s sensors), I've had the codes read which said its running a bit lean?, Im getting frustated, anybody got any ideas