I read they can be done right and get 35 to 60 Hp gains but for a little extra money you can get a set of ported and polished PI heads ( 1400.00) with a new intake and get 65 to 100 Hp gain
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98 GT / convertable -98 Saleen engine, Saleen appearance pkg. SHM cams,P&P NPI heads, and so much more!
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