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Will our stock exhaust add any performance to....


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My buddy has a 5.3 V8 in his GMC Sierra and I was wondering if our stock exhaust(headers to muffler) would add any performance gains to his 5.3? Would our headers work on a 5.3. He's looking to add some performance to his truck and if my stuff will help out it would save him some cash. :D

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i have my old intermediate pipe with cats and the cat back part off of my ss on my 04 5.3 and theres no power difference, it just sounds alittle better.


i agree,


I ran the stock 6.0l system from engine back on my 5.3 z71 and didn't notice much of a differance other than sound.

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