Includes standard thickness 3.9L Cummins head 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 machine guidelines are included.
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! IF YOU NEED 10 or 20 OVER STOCK THICKNESS, PLEASE ALLOW 2 WEEKS BEFORE SHIPMENT.
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