Don't gut your cat, its worth too much money. Just replace it with a cheater pipe. I did that on almost all my V8's & it made a huge difference.
V8s suck a lot more air and therefore have a lot more exhaust than your Celica motor.
True, but why is everyone doing CAI
, headers, cat back systems, TRD
I have been told by a couple of experts that the catalytic converter is by far the worst bottleneck in the system. But yah, I agree, the size of the stock pipes & Intake
in a Celi would be good for a motor twice the size. Stock highflow.