The gapless second goes against the current trend to use .002 more gap in your second ring than the top ring.this prevents gas buildup between the top and second ring that unloads he top ring.thats why every one of our dyno tests have made more power with a conventional properly gapped top ring and larger gap on the second ring than the Total seal gapless second ring. with a properly gapped top ring on the dyno the engines show the same amount of ring leakage on the blow by meter as the gapless ones.when the engine and ring package is up to temp there should be very little gap.Bill