I have a NOS wet plate kit currently. I am switching to a FAST 90/90. I want to go with the HSW 90mm plate , will this work with the rest of the NOS kit? Im assuming so.

 

Yes it will! You may have to get different feed lines. The only restriction may be the NOS solenoids (not sure what their power limit is). My nitrous installed started off as a NX MAF kit until I relized I couldn't use the maf plate with and aftermarket maf. I just bought the HSW conversion and used all of my other NX stuff.

 

you shouldnt have any problems at all just buying the conversion kit. Send me some info on which NOS kit you have and i'll double check to be sure, shouldnt be a problem though.