I have the stainless exhaust manifolds with no cats and a pair of 100 cell cats. The exhaust is modified internally by Carnewal. Sounds great and released a few more ponies.
I should add mine throws a CEL for cat efficiency as the rear lambdas can't keep up. I've tried the lambda spacers. The car passes MOT emissions no problems.
Last edited by edc; 07-14-2015 at 12:49 AM.
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