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Formely SSierra08
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4,536 Posts
Discussion Starter · #1 ·
Tookm my truck to the dealer yesterday to get the trans gasket replaced and they told me its about a week for parts. They gave me a 09 tahoe xfe with the 5.3 and 6 speed tranny. Long story short I missed how quiet it was , my question is, is a exhaust really a benifit. i might take mine off and put factory back on. I have 08 sierra 5.3 with flowmaster 50 series dumped. Anyone that has seen actual numbers on a dyno would help or does a tune benifit from a exhaust
 

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pro grade member
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2,264 Posts
exhaust will help depending on the setup. flowmaster from what i hear flows horribly. i cant speak for the NNBS but the NBS gets a gain from a good catback setup. tune will so a good gain no matter what u do
 

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LAID OUT TIRE FRYER
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1,992 Posts
the stock muffler is what kills your performance, but i think the suv line has another resonator and the end of the exhaust. that could be why its quiet. but changing out that flowmaster for a magnaflow would be beneficial in performance, and will be quieter than the flowmaster if you get the larger magnaflow muffler.
 
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