ATHENA-SCE HEAD GASKET - 6 BOLT LSX - W/ VULCAN CUT-RING - 4.056" - 0.059" - RIGHT - SCE-CR190559R
This Is the ultimate seal for your LS engine! Available in 3.997", 4.056", 4.150", and 4.174" bore sizes.
These gaskets use a stainless o-ring that cuts into the head to provide the strongest seal available for high boost or high compression engines. Because the o-ring cuts into the aluminum head, when you pull the head off you will have to surface .0003"- .0005" before reinstalling the head.
They feature the extra tabs for 6-bolt capabilities as well. We have been told that if you'd like to use them on a standard 4-bolt LS block, you can simply cut the tabs off or leave them alone.