Sorry for any confusion but like I said before I came across info that PC piston kits use OEM rings. Someone had an issue with using OEM rings on his 09 250r with a PC piston. He also tried JE rings since JE manufactures PC Pistons and those were too thick to fit in the piston grooves. So he had to order OEM rings from a different year, just wondering if this issue would come up on a 05 450.
I called Pro Circuit (No automated BS, No 1hr wait, someone picked up after a few rings!) and got the verification that they do use OEM rings in their piston kits and there shouldn't be any fitment issues with the 05 450s. Problem solved
