Hi guys, to those of you who are running a HKS oil cooling kit, if you have purchased the universal kit, there should be a part that is left over, it is used to secure the adaptor to the block of the engine. the kit usually comes with two sizes, 3/4-16UNF or the M20×P=1.5. I currently have the 3/4-16UNF, I need the M20 x P=1.5, the r33/4 skylines uses the 3/4-16UNF for this kit.
Thanks,
Steve