its called a ring grinder they sell the at most all auto parts stores...and yeah you may have had problems with them but shit alteast my shit runs when i built it the first time the only reason it let go because i was on a freshly seald motor that was pissing oil outta the head the rings where weak and the pistons wobbeld... yeah i got beat by a singel cam on spray...i also walked all over a sprayed hatch im the oaks that was one a 150 shot he said so get your shit together tony and lets fucking run next weekend for money ill take the money i make off of you and get some new shit for the car i do need the nitrous kit filled... no more talking shit about getting beat by a single cam... bring the money bring the car lets run...