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doug4321 · 11-11-2008, 05:38 PM

I just had a flowmaster installed on my 08 Mustang premium 4.0.Pony package.I did it to pick up a little more HP and gas mileage.The Flowmaster sounds like s---.The car sounded much better with the stock muffler.Is there any better sounding mufflers that are low restrictive that sound mild,but improve HP and gas mileage?Thanks.

11-11-2008, 05:38 PM	#4
doug4321 Join Date: Sep 2008 Vehicle: 2008,Mustang,v6 coupe Location: New Mexico Posts: 15	Flowmaster I just had a flowmaster installed on my 08 Mustang premium 4.0.Pony package.I did it to pick up a little more HP and gas mileage.The Flowmaster sounds like s---.The car sounded much better with the stock muffler.Is there any better sounding mufflers that are low restrictive that sound mild,but improve HP and gas mileage?Thanks.