what kind of heads? Ported stock? If so, the chip is useless, is your car Mass Air? If not I suggest you convert. There are still tons of stuff you can do to your car, a custom chip is usually the last piece of the puzzle.
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StAnGaHoLiC!!!
1995 GT
S-Trimmed 306, with H/C/I, and some other stuff. It just sounds fast.
My Car
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