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Old 11-15-2010, 09:51 AM   #2
kawracerx
Registered User
 
Join Date: Jan 2010
Location: ohio
Posts: 99
My Ride: 2003 325xi
Aa makes a supercharger kit for the xi at 8psi I believe, don't quote me but think you gain 75hp.and offer automatic trans tune to help hold the power better by increasing fluid pressure and other small things.no turbo kits unless you fab up yourself and will cost lots and lots of money, and not worth it for xi because it can only handle so much power due to transfer case.hope that helped,i want the supercharger for myself but just expensive.

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