With a supercharger you can throw away your cai. With turbo you can throw away your exhaust. Either one will net good numbers but the supercharger will definitely be cheaper. Not sure but i'd assume 6-8 psi is the max you can run on either. Don't forget injectors, dynotune, and other miscellaneous costs to either one
"I'm not driving too fast...just flying too low"
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
90 7up vert - new project-07 DSG Focus -DD