21 Hustler

I have a 2001 mercruiser 6.2 with a whipple supercharger on it. the engine is stock inside with a bolt on whipple. I have been told that i need to rebuild to supercharger spec, becuase i am gettin oil leaks and the stock insides cant handle 7 lbs of boost. does anyone have any suggestions on what materials and such i need and also how much the whole job will set me back $$. Thanks

Justin