Thread: what a day - 3.4 pulley issues

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 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