Quote:
Originally Posted by Ed Wright
They wouldn't run quicker with full exhaust either. LOL
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Mine did!
I'm always messing with jetting and after a couple of years running TTI step headers with collectors and jetting it as best as I could, I switched to a 3" exhaust with an X-pipe and ending at the rear housing with Dynomax Ultraflow mufflers. The extra 60+ lbs was removed from elsewhere in the car and it wanted jetting 1-2 numbers less. But in the end, I picked up .05-.10. I believe it was mainly the X-pipe.
If I didn't think it helped, it wouldn't have stayed on. It's cramped to swap center sections and the exhaust has to be dropped for trans swaps or disconnected for teardown.
It scared the heck out of me for a while because I heard things I never heard before!