o2jayjay

first i would like to start off with saleen sucks at customer service. that why those punks are out of bunisses. second i am looking to change the pulley out of my 2002 saleen. i was told it is a fourth generation supercharger. my questions is what kind of supercharger is it? the m90 or m112. i have been looking for 2 weeks and i am almost certain its a m112, but i figured the people on the forums might know. so here i am. can anyone answer this question for sure? it has this thing on the side of the supercharger that closes off the bypass valve when 50% or more throttle is given to build boost. its also silver. what size pulley are they and what their stock boost?