Product Description
Cometic LS .040" MLS Head Gasket – 3.910" Bore, 4-Bolt
Fits 1997–2013 LS-Based 4.8L, 5.3L & 5.7L Engines | Choose Single (1) or Pair (2)
The Cometic .040" MLS Head Gasket with a 3.910" bore is precision-engineered for 1997–2013 GM LS Gen III and Gen IV engines. Built from multiple layers of stainless steel for maximum strength, this gasket delivers exceptional sealing and long-term durability under high compression and extreme temperature conditions. Its Viton-coated outer layers provide superior heat resistance up to 482°F (250°C), ensuring a reliable seal between aluminum and cast iron surfaces — no sealant required. Perfect for both high-performance and OEM rebuilds, this gasket ensures consistent compression sealing and long-lasting reliability.
Key Features
- Premium Cometic multi-layer steel (MLS) head gasket engineered for LS Gen 3/4 engines
- Constructed from multiple stainless steel layers for superior strength and heat resistance
- Viton coating withstands temperatures up to 482°F (250°C) and ensures leak-free sealing
- Resists corrosion, rebounds under pressure, and maintains compression under high load
- No additional sealant required — ideal for performance and stock rebuilds alike
- Sold individually or as a matched pair for complete engine coverage
Specifications
- Material: Multi-Layer Steel (MLS)
- Compressed Thickness: .040"
- Bore Size: 3.910"
- Number of Layers: 3
- Coating: Viton (heat-resistant up to 482°F / 250°C)
- Orientation: None (non-directional installation)
Key Fitments
- CHEVROLET: Avalanche 1500 (2002–2013), Camaro (1998–2002), Colorado (2009–2012), Corvette (1997–2004), Express 1500/2500 (2003–2018), Silverado (1999–2013), Tahoe (2000–2014), Trailblazer (2003–2009)
- GMC: Sierra (1999–2013), Envoy (2003–2009), Yukon (2000–2014)
- PONTIAC: Firebird (1998–2002), GTO (2004), Grand Prix (2005–2008)
- SAAB: 9-7X (2005–2009)
Note: Fits 4.8L, 5.3L, and 5.7L LS-based engines only. Not designed for 6.0L or 6.2L applications. Sold individually — choose a quantity of 2 for a complete engine set.
