CEL light after changing to hi-flow cat.

Sharing with some experience i went through after changing hi-flow cat.

different workshops use different methods to solve the CEL.

1. Fong Kim, they use some kind of chip to trick the ECU

2. Jeep Chee, same method used by FK

3. Man Exhaust, they add a 7in long, 2cm in diameter pipe and connect it to the current o2 sensor hole(at the main exhaust pipe after the cat). then place the o2 sensor at the end of the 7in long pipe.

4. Supreme motorworks, they make a small piece of metal and place it after o2 sensor.

and all works.

Thanks!

thank u for the update