Sinister Black Onyx Head Gasket - 01-10 Duramax


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$124.00 - $130.00

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Product Details

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Product Name: Black Onyx Head Gasket
Manufacturer: Sinister Diesel
Application: 2001-2010 GM Duramax

Replace blown, leaky stock head gaskets in your diesel truck with Black Diamond high performance gaskets. These gaskets are designed to operate in the extreme heat and high cylinder pressures that your Diesel produces. 5 layer stainless steel sandwich construction. Each replacement gasket features an extra heavy duty seal for each cylinder to ensure total combustion chamber seal that high compression turbocharged diesel engines requires. Sinister Black Diamond gaskets are coated with an adaptive fluoroelastomer (FKM) coating to ensure maximum seal of fluids. The FKM coating ensures a total seal between your block and cylinder head.

These gaskets are designed to fit GM Duramax Diesel engines LB7, LLY, LBZ and LMM for 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 years for both Silverado and Sierra 2500 and 3500 models with 6.6 liter engines. Sold individually, you'll need a driver side and passenger side gasket.


  • Construction - Multi-layer Steel
  • Product Design - Driver Side, Grade A .95mm thick, Coated with Adaptive fluoroelastomer (FKM)
  • Kit Includes - (1) Sinister Diesel Black Diamond 20mm Head Gasket

Product Highlights:

  • Includes Left and Right Side
  • Reduced bore distortion
  • Improved engine performance
  • Reduced oil consumption
  • Improved durability

These are 5 layer MLS head gaskets with elastomer coating. Embossment shapes are designed to improve durability.


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