Originally Posted by killer_cr80r
1999 pontiac grand prix gtp
K+N CAI 75.00 on ebay
custom downpipe claims 12 hp $120 on ebay
Dual 40 series flowmaster mufflers about 80 on ebay
high flow catalic converter
intense PCM chip $160 on ebay
What would be the 0-60 time and 1/4 mile time a round abouts time i am looking for.
CAI maybe 5hp
Downpipe is only 5hp, not 12.
Mufflers? Maybe no gain. No more than 10 for the cat and mufflers together, and you may hate the sound.
3.4" pulley will add about 25hp.
Not sure about the chip.
Compare those mods to cars on CGP. You'll get a better idea there.