well then i don't know why my friends was like that but we did need the itr tb cable... and no you can't put the itr skubk2 mani on a gs-r head. a skunk2 mani is a type-r manifold made to bolt on to the gs-r head. thats why it's such a pain in the ass to try and put a stock type r manifold on a b18c1 head