Drspencer

iTrader: (1)

You're about as quiet as you're gonna get....I mean..I wish I would've left the stock exhaust and just welded in the longest packed Magnaflow muffler I could find leaving the tailpipe resonator. I have pretty much the same setup '08 Avalanche 5.3, ported 862 heads, comp 208/212 cam, long tubes, catted y-pipe.