as for number not sure as of yet. last time i used this turbo i put down 365 hp at 20 psi no cams stock jp and a 3" exhaust. it definatly feels faster at lower boost i have yet to brin it past 13 psi. i really like the cut out. it opens at about 12 psi becuase of the long hose on it and i think its great and has good build quality. the dp is from CES out of australia they make it for the gtir and it bolts on to any t2 exhaust based turbo. it will only fit with a det oilpan *** becuase of the shape and its not cheep eithr

cost me bout 600$ shipped
http://www.jgycustoms.com/240sx/turbos.htm is alink with my dyno chart
Rocco