Hey everyone, I am wondering a few things. I believe that the b18c1 and the b18c5 have the same specs but is there any major differences? Im planning on building the b18c1 bottom end using the gsr rods and ctr pistons with a b16a2 head. (almost a type r). Im just really concerned if the ITR rods are better in any way than the gsr rods. They both say P72 but the ITR has an "R" stamped on them. I also ran into someone today that wanted to sell me a set of used type r rods that have been shot peened. Let me know any details that would benefit me.