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Originally posted by CMELEVU:
When it comes to bench racing/dyno, my friend is a pro. He's going with these, http://store.summitracing.com/partdetail.asp?autofilter=1&part=WLK%2D17223&N=700+4294923429+400358+115&autoview=sku

supposedly they flow 2200cfm. I dont think running an open exhaust is going to be very ear friendly in a street car. Plus I agree with some previous posts, on a stock displacement motor, back pressure is your friend.

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Originally posted by Motorhead6T5:


You will gain no power though. Their was a dyno test done with stock,no mufflers,and every aftermarket muffler. There was no gain more than 2hp between any of them.

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not true.i have personally installed many exhaust systems and mufflers that have gained great numbers at the track and dyno on just those changes.3/10's is ALOT more then 2 hp.DONT beleive everything you read

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Originally posted by HaulinAss Motorsports:

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Originally posted by Motorhead6T5:


You will gain no power though. Their was a dyno test done with stock,no mufflers,and every aftermarket muffler. There was no gain more than 2hp between any of them.

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not true.i have personally installed many exhaust systems and mufflers that have gained great numbers at the track and dyno on just those changes.3/10's is ALOT more then 2 hp.DONT beleive everything you read

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05-07 stangs gain nothing from a axle back. The stock muffler is high flow,and the whole exhaust is mandrel bent 2 1/2" from the factory. Not talking about 5.0's

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65 Fastback
72 Malibu