I purchased the 3.4 pulley from the u.s.a and nothing but problems put it on my grand prix and loss power insted of gaining it i was told i could gain 30 per. Mo horsepower now on high rpm its knocks retard i dont know how to get away from the problem i have a 98 gtp i thinking of putting the old one back on went like stink this new one sucks any body else have this problem:th_thumbsup-wink: get back to me thx
if its to good to be true than its not even filled up with 94 per oct a liuttle change not much
if its to good to be true than its not even filled up with 94 per oct a liuttle change not much
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