i member here "buck" did a 3 inch cat back and lost HP on the dyno. theres no gains for a sc engine on a 3 inch. a turbo sure. not a sc.Originally Posted by coolone
Not entirely true (Catback wortless). It all depends on your plan, where you want to take the engine, car. If mild mods, sure, just open up the exhaust a little with headers and provide better flow in/out and you'll see a nice improvement in acceleration. But, if you plan to cam your engine, open up intake, heads, headers, etc., then a 3" exhaust to the tails benefit. I went 3" all the way early on with the knowledge in the future I would mod more. It certainly didn't hurt anything. And for the exhaust notes or sound, some say it'll always sound like crap, but try using the vibrant ultra quite resonator and Hooker MaxFlow mufflers... Is the best sound hands down you'll ever get from this engine. Use youtube, you'll see
