Hi Michael yeah from what i gather the 5 puk can be made as a pull type clutch and that indeed will suit all RB engines what Doug tells me is the pull type clutch will handle a little more power as there a 10" clutch where as the push is a 9" and yes add $100 on top of $550 for a pull type, i hope this is clear
EDIT: the $1023 GTR clutch has a pressure rating of about 3600lbs dont be mislead you wouldn't get that clutch for $650
sorry Simon i thought my response was very clear i will say it another way all GTR from R32 v-specII (NOT SURE about normal v-spec) and newer all take the pull type clutch
NOTE: the NPC twin plate clutch only comes as a push type clutch you can however convert a pull type clutch system too push