2001 gmc sierra more power
#4
More power
Gotta let them breathe. Probably the first thing I would do is install a good cold air induction system with some kind of K and N filter. I would then install a good exhaust system. Lots of guys here have gone to a Borla system and like it. Kinda pricey. I went to my muffler shop and had them go 3" pipe right after the Y pipe, into a Flow Master Muffler, two 2 1/2" exits into duals. Probably the cheapest thing to do for pretty good results without cracking the engine.
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