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Old 07-13-2012, 01:26 PM
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snrusnak snrusnak is offline
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Join Date: Jan 2011
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Vehicle: 2010 Dodge Ram 1500
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Engine: 2008-20?? 287ci (4.7L) PowerTech V8 310hp 330lb/ft
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Wow you're exhaust is 4"? Is it off a diesel? You are probably losing some power from that. 3" is about as big as you'd want to go for single exhaust, and about 2.5" for duals. You need to keep the diameter small enough to promote high exhaust gas velocity, otherwise you will lose some power. The stock sizing is very good, but the stock muffler, y pipe, and manifolds are fairly restrictive.
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Sean

Breathing in and out is good enough for me.
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