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I just eliminated the muffler, installed extentions pipes, and then welded a y pipe to the stock tail pipe. It sounds really nice and reminiscent of how a good friend of mine's Z71 sounded.
Flip your glasspacks backwards. Becuse they are directional so if there flipped there won't be baffles to catch alot of to aggressive exhaust note. But will still keep the drown down with the fiberglass insulation.