 I've always liked the way Flowmasters sound. I still use them for my "street" system. My car is a little quicker w/ the bullet race mufflers on it so that's how I race it. FWIW...when my car was running 11.40s at 117 mph, it ran the same w/ the full 3" exhaust and 2 chamber (40 series) flowmasters as it did w/ open headers.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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