How many CFM is a stock 4.8L/5.3L muffler capable of flowing?
Jul 26, 2008 | 03:16 PM
#13
the stock muffler is junk, holds water and will rust out eventually. Not to mention they weight a ton. I replaced my stock muffler with a 2.5 in/out dynomax ultra flow and noticed alittle differance in performance and sound and also seen a small gain in MPG.
IMO its money well spent, but just the muffler, the guys that drop a grand on the corsa cat backs are just throwing money away. the factory pipes flow just fine.
IMO its money well spent, but just the muffler, the guys that drop a grand on the corsa cat backs are just throwing money away. the factory pipes flow just fine.
Thing is at what point do you not believe what a truck puts down on a dyno?
I personally seen a truck on the dyno gain 15hp to the wheels going from stock to Corsa.
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