Quote:
Originally Posted by DSX_Camaro
The further the gas is from the engine, the cooler it is and slower it moves. You have to maintain the exhaust velocity throughout or you will lose power. Yes, just the axle back will have a significantly less negative effect, but a full 3" system on an N/A V6 car will lose a fair bit of performance, especially on the low end - now, on an automatic this will matter less in theory because it can just leave the converter unlocked, but on a manual car you'll be wearing your clutch harder with the reduced low end power, nevermind the actual drivability detriment. It'll sound great though. Voice of experience. Lol. I bought in to the "3" exhaust is okay if you have 2.5" downpipes" and was harshly disappointed. Swapped to a stock ZL1 NPP system w/ the Magnaflow 11386 added in and my car pepped right back up. I miss the 3" sound now, definitely going to go back soon when I rebuild the motor and boost it.
We don't have V8s though. Stock vs stock there's a 12hp difference between our engines. We could run a single 3" exhaust and gain low end power without sacrificing any top end because a single 3" pipe can support something around 340hp if I am remembering correctly.
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Engine is the same really auto or manual.
But once you go boosted, the larger pioe size is beneficial. N/a not so much
http://support.magnaflow.com/07techt...question10.asp
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