AO Gold Member
Join Date: Jun 2007
Location: United Kingdom
Slight increase in performance I'd say, but it's hard to tell as mine was never standard anyway.
If you want to decat completely, the easiest way to do it would be to fit the manifolds and exhaust from an earlier CF2 V6 - it's an engine out job to change them though I believe.
You'll also have to fit some kind of resistor to the second set of lambdas to fool the system into believing the cats are there, otherwise the engine management light will illuminate.
As for silencers, I only have the precats and the backbox. It's a Supersprint, so it isn't too loud at all.