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i switched from 3.23 to 3.42 and noticed a good difference. but if mpg isnt an issue go with 3.73's
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2005 PBM M6 Red interior GTO
-CNC ported LS6 heads, PAC Springs, HPE-C cam, SLP Under-drive pulley, 160 stat, Harland Sharp Rocker arms, Volant CAI, MSD Wires, Ported TB and Stage 2 Intake by Jeremy Formato, ARH 1 7/8 Long tubes and high flow cats, MagnaFlow CatBack, GMM race shifter, Pedders street 1 bushings, Textralia OZ700 clutch, Gforce Halfshafts
455RWHP/411RWTQ
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