4P R40 K24Z "4-Port" Race Head Nissan GT-R This is a replacement long

This is a replacement long block only

VTEC and VTC are retained

All Skunk2 camshafts are designed and tested in-house in an effort to ensure high quality and maximum performance gains and are manufactured to Skunk2’s stringent specifications using state-of-the-art CNC camshaft grinding equipment

This bolt has a much higher clamping load with its drastically increase yield and tensile strength

Ferrea Drag Race (shimmed 0

4P R40 K24Z "4-Port" Race Head Nissan GT-R This is a replacement longIntroducing the 4P R40 "4 port" Race Head The big debate of porting the R40 or swapping to a 4 Port head for your 9th generation Civic will be battled to the death. There are absolute advantages to both configurations. For you guys that want a 4 Port and fly that flag, we have the ULTIMATE solution. Our 4 Port Race casting gives you an OEM R40 water configuration and a 4 port exhaust layout.. and NO half ass RTV on the gasket surface or welding. It