I just purchased a gsr head and it seems alittle different than my stock gsr. The intake manifold is a bit different in terms of hoses and such and the throttle body is a little different... Is there any way i can tell if the head that i purchased is jdm or usdm... The owner told me it was off a 95 gsr and mine is a 96 so maybe thats y its kinda different but im just trying to make sure... thankz

 

anyone?

 

The heads are physically the same. Intake manifolds are slightly different with respect to the EVAP solenoid mounting. OBD-2 manifolds mount the solenoid in b/w the #2 and #3 runners. OBD-1 manifolds mount the solenoid by the throttle body.

OBD-2 throttle bodies also seem to have deleted the fast idle thermo valve on the bottom of the throttle body, but I haven't seen enough 96+ throttle bodies to say whether this is true for all OBD-2 throttle bodies.