05-06-2013, 11:52 AM
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CC Member
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Join Date: Jan 2009
Location: Jonesboro,
AR
Cobra Make, Engine: Backdraft 874 solid red Roush 427 small block 515 hp
Posts: 572
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Not Ranked
Some sidepipes are more restrictive than undercar exhaust with proper mufflers. I had 3" straight mufflers made for my Backdraft that had two mufflers in each round pipe. Some folks say they are losing 75 hp with restrictive side pipes.
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