5150 AutoSport
5150 AutoSport Head Gasket & Head Stud Kit, BMW / Toyota B58 Gen2
5150 AutoSport Head Gasket & Head Stud Kit, BMW / Toyota B58 Gen2
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MLX Head Gasket
The Cometic MLX Head Gasket is engineered for B58 turbocharged inline-six engines in BMW chassis and the Toyota GR Supra A90/A91. It replaces Toyota part # 11115WAA04.
C14144-036, C14144-040, C14144-042, C14144-04052
Built with multiple layers of coated and uncoated stainless steel, MLX gaskets conform to the cylinder head and block during the first heat cycle, forming a chemical bond for superior sealing. The layered design acts as a spring, preventing blowouts and compensating for head lift.
Note: MLX gaskets are not compatible with engines using O-rings or receiver grooves, as they require smooth surfaces for proper sealing.
Cut-Ring Head Gasket
The Athena Cut-Ring Head Gasket for B58 Gen 2 replaces part # 11115WAA04. Made from M0115 asbestos-free material, it features AISI 304 stainless steel Cooper Rings that bite into the aluminum head for maximum sealing, ideal for high-boost (2+ bar) applications with turbo or nitrous.
Sizing: Gasket should be 0.5mm to 1mm larger than the piston. (e.g., 84mm piston → use 84.5mm or 85mm gasket).
CR330154, CR330155
Head Gasket Installation instructions:
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Ensure the engine block and cylinder head surfaces are clean, flat, and free from any debris, oil, or coolant.
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Install head gasket on the engine block and ensure that it is properly aligned. Avoid twisting or bending the gasket during installation.
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Place cylinder head on top of gasket and install the head studs in their correct positions.
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Follow the ARP's recommended torque specifications and tighten the bolts or studs in the proper sequence to ensure even clamping force across the gasket.
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After initial tightening, re-torque the head studs after the engine has been started and then allowed to cool to room temperature. This will ensure that the gasket is properly seated and compressed.
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It is recommended to not use any additional sealant on head gasket. Using additional sealant can hinder the performance of the gasket.
Head Stud Kit:
The ARP2000 Head Stud Kit, 203-4705, is designed for the turbocharged inline 6-cylinder B58 engines found in various BMW chassis and the Toyota GR Supra A90/A91. As you increase the power output of your engine beyond its factory specifications, the head and block may start to separate, causing factory bolts to stretch and fail. ARP Head Studs are stronger than factory bolts, ensuring your race engine stays together even under extreme conditions.
The Custom Age 625+ option, 203-4706, is made from a material that has a tensile strength of 260 ksi, which is substantially higher than the 190 ksi of the ARP 2000 head stud. It's an ideal choice for individuals who want to push the limits of their B58 builds and require a stronger head stud.
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