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there have been known some applications with a 4 master spline pitman arm
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Replaces part numbers 68186711AA
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Cometic MLX Left Side Head Gasket 01-16 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML Thickness Selection:.053" there have been known someWith miles racking up in your 6. 6L GM Duramax, it may be time to reseal the head gasket of your engine. The Cometic MLX Head Gasket is exactly what you need. The MLX line of gaskets are great for stock or performance builds and uses multiple layers of corrosion resistant stainless steel for increased strength. The outer layers of the gasket are embossed and coated with a flouroelastomer rubber based material that is heat resistant to 482 degrees.
