Originally Posted by doz
I think exhaust wise, the only serious performance youd see would be with headers > true duals. Go from header collector > hi-flow-cat > 2.5" pipe > muffler > tip. Theres definitely no point in a catback on 09+ from what I see. Id like to see a true dual kit come out though for sure.
I totally agree. With the performance of factory systems being so good these days, only the most hardcore upgrades are going to yield a significant performance gain. I'd like to see some dyno numbers myself tho.