oh yes they do
. vortech has a mongoose kit fits on 99-04 gts its a centrifugal tho i spelt that wrong i know i did. Modualar power house tested the sq trim on stock motors pushing 8 psi making anywhere from 365 rwhp to 385 rwhp that non intercooled or aftercooled no headers or nothing but your gonna need a clutch FOR SURE and youl want a cooler just make sure the hp gained dont knock it over stock recommendation. Kenne Bell and many other brands to superchargers for the 99-04 gts. My buddy had 10 psi off the vortech running an after cooler headers a short throw and x pipes ran 12.7 at thunder valley here in bristol thats awesome for such a high elevation, stock cobras average low to mid 13's here.
