I have a 12:1 Arias piston for sale. It needs a ring set ($30) from arias directly and that is it. I can send a picture of it if wanted. It has barely any carbon build up on it. It is like new. This piston can be ran with 50/50 mix or straight race fuel. This piston make the warrior come alive. I have rode warriors with wiseco and JE pistons and they don't have the throttle response and power that this piston has. The only reason I am selling a good piston is because I bored mine out 40 over and put a 40 over arias piston back into it.