M5X/S5X Cut Ring Headgasket (Cooper Ring)


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Ultimate head gasket for forced induction M5X/S5X based engines.  These feature an organic gasket combined with a metal cooper ring/cut ring around each cylinder for an unbeatable seal.  Combine this gasket with one of our ARP head bolt sets for a bulletproof gasket solution.  Does not require any additional machining for the cut rings (unlike o-ringing).  The latest version of this head gasket includes newer style cut rings that have a triple groove cutting surface for maximum sealing.

This gasket can also be combined with a copper spacer to lower the compression for forced induction on a stock bottom end (Not needed for low compression motors).  Add a ARP head stud kit to complete the package! 

When you are not running a copper spacer, we recommend running at least 1mm larger gasket than your bore size so the pistons have no chance of contact with the cut rings.  If you have a question please shoot us an email and we’d be glad to help.  These parts are not always in stock as they are low volume items and we purchase them in batches.  Please email for estimated ship dates if it is a time sensitive purchase.

Weight 4 lbs
Select Bore Size/Thickness

84.5MM .079″ Thick, 85MM .063″ Thick, 86MM .079″ Thick, 87MM .079″ Thick

Add copper spacer?

No, Yes (+$200)

Add ARP 2000 head stud kit?

No, Yes (+$185)