they claim 50% HP gain at 5 PSI, not bad. that would take the stock crossfire to the 330 hp range, and 65% at 7 PSI which would be around 365 HP. They even have this kit attached to a shitty ecotec 2.2 liter engine and it runs fine. Isnt the supercharger on the srt-6 running at around 1 bar( apprx 14.5 psi?)?