i read some were that u made more power by running duals most of the way then going back and exiting into one pipe. my wifes cousin has a highly moded 05 rcsb silvy and had duals all the way then went back to a singal tail pipe and said that it made a big difference in power increase.
David,
2003 GMC Sierra Denali, LQ4, AWD, AWS, 4.10, Wheatley 93 tune, LT headers, GMPP CAI, BBK 80mm TB, MSD wires, E3 plugs, 160* T-stat, Flowmonster DI/DO, cutouts. Working on 4.8 heads, just purchased Comp 228R cam, 918 Springs, TI retainers, 7.4 hardend pushrods,
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