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Pollock · 06-12-2011, 11:13 AM

Can I just install high flow cats with my stock exhaust manifolds and not have to tune the car? I am not ready to give up my warranty just yet and thought the high flow cats might help a little.

06-12-2011, 11:13 AM	#1
Pollock LT4 M6 Drives: 2018 ZL1 1LE Join Date: Nov 2010 Location: Bloomington, IN Posts: 1,249	High flow Cat question Can I just install high flow cats with my stock exhaust manifolds and not have to tune the car? I am not ready to give up my warranty just yet and thought the high flow cats might help a little.