I have the Invidia Downpipe, GT Spec2 headers and up pipe, and the Greddy Evo 2 cat back. I really like this set-up............Still has the melon shooter opening, but straight and very quiet.
The EVO 2 does taper to 2.75 inch at the downpipe connection if that is a concern. I can't imagine that I am losing more that 2-5 whp on that though.
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