Thanks for the Info. I went to the JRSC site and looked up the MAP sensor, but it says they are only available for the CRX and all Civics. Are the Civics Compatable with Preludes? or do I need to contact Jacksonracing to get info on one for a lude? Also, will the censor map completely block out my vtec? or will it just change the rpm engaugement like the Vtec controller does? Again, thanks for the replys, it will definatly help when I go shopping =]