Includes standard thickness AFTERMARKET 12 valve Cummins gasket modified for the use of fire rings.
Requires the machining of grooves into the cylinder head or engine block for use.
6 mild steel rings included.
Detailed instructions on machining guidelines are included.
IF YOU NEED 10 or 20 OVER STOCK THICKNESS, PLEASE ALLOW 2 WEEKS BEFORE SHIPMENT.
There is absolutely NO WARRANTY expressed or implied on any fire ring head gasket.
Want to read more about Fire Ringing vs O-Ringing your cylinder head? Click here!