Chevrolet Silverado 2500 Valve Seal Set - COMP Cams. This Viton set is engineered for 2001-2005 6.6L Duramax heads using 7 mm valves and 0.426 in guides.

Built from high-temperature, fuel- and oil-resistant Viton, these seals help maintain precise oil control under towing, tuning, and daily duty. Sized for the Duramax's 7 mm stems and 0.426 in guide diameter, they provide a consistent fit that supports valvetrain stability and reduces oil seepage into the combustion chamber. Ideal for head refreshes or when pairing with springs and retainers on Silverado 2500/3500 builds.

Features

• Application: 2001-2005 GM 6.6L Duramax (Silverado 2500/3500)
• Material: Viton for heat and oil resistance
• Valve stem size: 7 mm
• Guide diameter: 0.426 in
• Quantity: Set of 32
• Manufacturer: COMP Cams
• Also available individually as COMP Cams 534-1; see 533 for 2006-2016 Duramax

Have questions or need fitment confirmation? Call us at 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations in Austin, Texas and the Los Angeles, California area offering professional installation and customization services.

Considering multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov