i have searched for a few hours now and i am curious to kno the sizing differences from a T3 42/48 and a T3t04b(i cant find compressor sizings or anything for this turbo it ussually comes with the fmax kits). reason being is my freind and i have the exact same setup but his still seems a hell of alot faster. only dif is that he is runnign a garret t3 42/48 even on the highway his car seems to pull harder. compression is straight, my tune is on 8psi his is on 10psi my turbo is a turbonetics t3t04b. is 8 psi that much different than 10psi he has on his smaller turbo? sorry i searched cant find **** especially for the a/r sizing on this that t3t4b turbo