They definitely do make a gapless .043 Top..........would I run them......NO. Am not a fan of gapless top rings. The reason is they never SHOWED me anything in regards to POWER. Great leakdown numbers and less on the blowby meter is fine, but does that equal more POWER and the car running faster. In our own Super Stock motors, that was not the case and we tried every ring combination there is

Last edited by Monte_Smith; 06/15/15 03:34 PM.