Patch Posted October 31, 2012 Share Posted October 31, 2012 Looking at the uprev maps and was wondering just how much difference/restricted the std cats are. Anyone on here had a remap on the std cats? Quote Link to comment Share on other sites More sharing options...
rtbiscuit Posted October 31, 2012 Share Posted October 31, 2012 they are one of the most restrictive parts on the car, them and the manifolds. the rest of the exhaust is alright for performance, bu the cats are a choke point. as well as the plenum. Quote Link to comment Share on other sites More sharing options...
MITZ@CougarStore Posted October 31, 2012 Share Posted October 31, 2012 The standard Y Pipe is also restrictive... Quote Link to comment Share on other sites More sharing options...
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