Cometic C5475-051 MLS Head Gasket – Pair | 3.910" Bore, .051" Thickness | Fits 1999-2013 4.8L 5.3L 5.7L LS Engines | LS1 LS6 LM7 L59 L33 LR4 LC9 LMG LS4 LMF L20

This Cometic C5475-051 MLS Head Gasket Pair is engineered for builders pushing the limits of Gen 3 and Gen 4 LS platforms. Featuring a 3.910” bore size and .051” compressed thickness, these gaskets are ideal for use with aftermarket pistons, stroker kits, and high-compression builds, where perfect combustion chamber sealing is a must. Built from five layers of embossed stainless steel, each gasket is designed to seal under high combustion pressures, elevated temperatures, and demanding race conditions. Cometic's proprietary coatings and multi-layer design ensure maximum sealing integrity, especially in forced induction or nitrous-fed builds. This listing includes two (2) gaskets, providing a matched pair for full V8 engine applications—ideal for engine swaps, top-end rebuilds, or complete performance overhauls on LS1, LS6, LM7, L59, LC9, and other 4.8L, 5.3L, and 5.7L LS engine variants.

• Sold as a Matched Pair – Includes two (2) Cometic C5475-051 MLS head gaskets for complete cylinder head installation on V8 LS-based engines. Perfect for full top-end rebuilds.
• 3.910” Bore x .051” Thickness – Designed to maintain proper quench and compression with stroker kits, overbore pistons, or forged rotating assemblies in street and performance builds.
• 5-Layer MLS Design for Maximum Sealing – Constructed using five layers of stainless steel for unmatched sealing under high cylinder pressure and elevated temps. Ideal for boosted, nitrous, or high-compression LS builds.
• Fits 4.8L, 5.3L, and 5.7L Gen 3/4 LS Engines – Direct fit for LS1, LS6, LM7, L59, L33, LR4, LC9, LMG, LS4, LMF, and L20 platforms from 1999 to 2013.
• Trusted by Performance Engine Builders – Cometic is a leader in performance gaskets, chosen for proven durability, precise tolerance control, and superior combustion sealing.