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Old 06-29-2002, 10:15 AM   #2
tireburner163
It's a lot like a race car
 
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Join Date: Aug 2000
Location: Meridian, MS
Posts: 4,130
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on a GT a cat-back is worth maybe 5hp.....so I wouldn't worry about that. A off-road H-pipe is a good idea and will add pretty good amount of power.
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