I think if you're putting 105 - 110 in the mph you should invest in a x-pipe, if not get a h-pipe. Stock cars use x-pipes because they rev so damn high. I figured my Cobra would benefit from it because it revs higher than a 5.0, but lower than a stock car. On my five liters I had h-pipes.
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1996 Laser Red Cobra. 12.64@108.1 mph; 1.92 60 ft. I keep racin' it, and it keeps getting faster!(It's still a heavy beast)
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