4.160 MLS Head Gasket .051 - GM LS1

The 4.160 MLS Head Gasket .051 - GM LS1 from Cometic Gaskets is a precision cylinder head gasket engineered for LS-series engine builders and performance enthusiasts seeking reliable combustion sealing. This multi-layer steel gasket addresses the demanding requirements of GM's iconic LS platform, where factory gaskets often fall short under boost, extended RPM ranges, or custom builds. Whether you're assembling a street engine, weekend warrior, or mild performance application, this gasket delivers the durability and sealing integrity that modern LS engines demand.

Cometic's multi-layer steel (MLS) construction uses precisely machined steel layers with elastomer facing to create superior gasket compression and recovery compared to traditional composite designs. The 4.160-inch bore diameter matches stock LS1 specifications, while the 0.051-inch compression thickness ensures proper chamber volume and combustion dynamics for stock or mildly modified heads. MLS gaskets excel at sealing under thermal cycling and pressure spikes, making them ideal for turbocharged, supercharged, or nitrous-equipped builds where peak pressures exceed naturally aspirated limits. The gasket's superior clamp load retention prevents blow-by and coolant seepage that compromise long-term reliability.

Installation requires proper head bolt torque specs and sequence—Cometic recommends following GM's factory specifications or your engine builder's protocol for optimal sealing. This gasket is sold individually, so confirm your engine configuration (LS1, LS2, LS3, or similar displacement variants) before purchase to ensure bore and thickness compatibility. Fits all factory and aftermarket LS cylinder heads with 4.160-inch bore dimensions, making it a go-to choice for rebuilds, restorations, and performance upgrades across the LS community.