my buddy had them on his car and liked them he thought they worked pretty good. good luck on your choice
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SLP loud mouth exaust, 3" down pipe "no cat", race ready trans, 3.0 quick change pulley (also got a 3.25 an 3.4),1.9 modified rockers with 105 springs, custom throttle body, custom CAI,custom sturt brace, gauge pod with boost an oil pressure,160 stat, limo window tint, reflective rear pontiac logo, sprint lowering springs, 18" giovanna corsica rims. 13.5 on my 18's with street tires.(GETTIN READY FOR A CAM REAL SOON GOT A TEP CAM FOR FREE)