Cummins 89-98 12 Valve .020 Over Fire Ring Gasket 12 Valve Fire Ring gasket

Upgrade your 12V Cummins (1989–1998) with our Fire Ring Gasket , engineered for reliable sealing under high boost and extreme horsepower. At .080″ thickness (1.8 mm) and 4.560″ wire O.D. , this gasket is built to handle the stress of performance applications.

Specifications

• Thickness : .080″ (1.8 mm)
• Wire O.D. : 4.560″ (using .105″ wire)
• .016″–.017″ depth in cylinder head with a .120″ radius cutter
• Machine Block & Head : Achieve maximum flatness for a proper seal—especially important if pushing horsepower beyond 800 HP.
• Engines under 800 HP: Cut groove in just the cylinder head
• Engines over 800 HP: make sure you use a high tensile ARP 625 fastener
• Radiused Cutter : Always recommended for precise groove formation and the best gasket-to-wire contact.
• Use Quality Studs : Ensure proper clamp load, vital for high-performance diesel applications.
• Generous Lubrication : Coat nuts, washers, and threads thoroughly to guarantee even torque across all studs.
• Manufacturer Torque Limits : Never exceed them—fasteners at full torque store significant potential energy.
• Initial Torque : 130 ft-lbs before first startup.
• Hot Retorque : After reaching operating temperature, retorque while the engine is still warm.
• Check Valve Lash : Each retorque compresses the gasket further, reducing valve lash—readjust as needed.
• High-Horsepower Ready : Built to withstand demanding performance applications beyond 800 HP.
• Precision Engineering : .080″ thickness, radiused grooves, and .105″ wire for optimal sealing.
• Enhanced Reliability : Reduce the risk of head gasket failure with proper studs and consistent clamp load.
• Backed by Expertise : Trusted by diesel enthusiasts who demand durability and performance.

Fitment

• Cummins 89-98 12V