A TINY bit of cutting of the front bar was required to fit this intercooler onto my R33 GTR, seriously it was more of a tidying up and shaping more-so than cutting for clearance. The amount of plastice removed from the front bar was absolutely minimal.
It also clears the factory BOV return pipe, so you can keep you stock GTR BOVs which I was very worried about
Straight bolt-in, and from memory the installation instruction manual came with pictured instructions for fitting to R32, R33 and R34 so it should fit all models (albeit using different mounts maybe)
Mine also had a temperature sensor hole on the exit end tank, which I covered up with the supplied blanking plate and gasket.
Awesome bit of kit, absolultely everything needed was included except for hose clamps, which I recommend you use uprated hose clamps from Triton or similar company.