4 inch exhaust on an avalanche need help
11-18-2011, 07:51 PM
#11
Staging Lane
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Join Date: Jan 2011
Location: depew, ny
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My goal is 500 hp... It was either dual 3 inch or single 4 inch... If I go dual 3 it was going to be 2 borla proxs muffs... Dunno what size muff case though
12-02-2011, 09:55 AM
#16
This is my plan. I won't run it for long with the cut out open so dumping it right after the headers wouldn't bother me. Plus I want the cut out closer to the front of my rig so when I'm launching the boat, my exhaust isn't underwater.
12-02-2011, 10:24 AM
#17
I would also say that 4" exhaust is overkill on a 500hp supercharged vehicle. That big of an exhaust system might benefit a turbocharger at the power level, but you want to keep some back pressure with your SC. If your avalanche is a NBS, I say put the factory 3.5" duramax exhaust system on it. It fit on my '03 silverado with minor modifications and I got the system for under $100 as well.
