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The Cometic GM LLY/LBZ Duramax Top End Gasket Kit - 4.100in Bore - .051in MLS Cylinder Head Gasket - PRO3009T-4100-051 is a precision-engineered head gasket with a 4.100" bore and .100" compressed thickness.
The Cometic Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring Multi-Layer Steel (MLS) construction, this gasket uses multiple embossed steel layers that conform to surface irregularities and maintain a positive seal. Precision CNC-machined to exacting tolerances, this gasket seals combustion, water jackets, and oil passages simultaneously — eliminating the need for multiple gaskets or sealing compounds.
Verified fitment: Chevrolet Express 2500 (2006–2007); Chevrolet Express 3500 (2006–2007); Chevrolet Silverado 2500 (2005–2007); Chevrolet Silverado 3500 (2005–2007); GMC Savana 2500 (2006–2007); GMC Savana 3500 (2006–2007); GMC Sierra 2500 (2005–2007); GMC Sierra 3500 (2005–2007).
Free U.S. standard shipping on qualifying orders $199+. Special order and made-to-order items can't be cancelled or refunded once ordered.
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We carry 750,000+ parts, so we can probably still get it. Check the spelling, try the part number, or ask us.
Request this part Text us (833) 691-5717