catalytic convertor

[psmvchaser]

I think my cat is going.

I already have a KB exhaust. Is there any upgrade for a cat? Or is it pretty much just the stock replacement that I should get?

Thanks,

Ken

 

[InvisiBill]

If you get a higher flowing cat, you'll most likely have overboost issues due to the reduction in backpressure unless you get a better wastegate (turbo can spin more easily, but the stock wastegate is still restricted).