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Thanks for all the info. I guess with what im reading is my car is about average for exhaust vs no exhaust. Plus a real slippery track. No more exhaust for me at the track



Its all about the back pressure in the exhaust, every
bend and which muffs. Some that are saying they picked
up is more than likely the front pipe is helping
the collector being a extension... a off the shelf
header MOST times has a collector thats way too short
so the pipe helps that(of course with a little to
no back pressure muff)




Exactly, Mike. Kind of what I said. Some exhaust systems may bandaid a poorly designed/tuned exhaust(primary pipe too big/short-collector too big/short ect). Locomotion, I know you know what's what so I don't have an answer for you. I do know that for classes(non bracket) that don't require an exhaust very seldom is one ever used.