Cometic H1090SP2086S Toyota MLS Head Gasket Bore - 4AG-GE 16V 82mm 086in

The Cometic H1090SP2086S is a Multi-Layer Steel (MLS) cylinder head gasket engineered for the Toyota 4AG-GE 16-valve engine. With an 82mm bore and 0.086" compressed operating thickness, this gasket is designed for high-performance and built-up engine applications where increased deck clearance or compression tuning is required.

Key Features:

• Multi-Layer Steel (MLS) construction — multiple embossed layers of stainless steel for superior strength, rebound, and corrosion resistance
• Viton-coated outer layers — flouroelastomer rubber coating on both sides of the outer layers, heat resistant to 250°C (482°F), sealing against a variety of load conditions and surface finishes
• Uncoated stainless steel center shim layer — varied to achieve the 0.086" compressed thickness, allowing precise compression ratio tuning
• No sealants required — MLS design provides a complete combustion and fluid seal straight from the box
• Ideal for aluminum-to-aluminum and aluminum-to-cast-iron pairings — withstands differential thermal expansion and shearing forces between dissimilar materials
• Reduced bore distortion — even torque load distribution across the sealing surface minimizes cylinder bore distortion
• Surface finish requirement — head and block deck surfaces must be machined to 50 Ra (roughness average) or finer for proper sealing

The Cometic H1090SP2086S is part of Cometic's Sport Compact line, purpose-built for performance enthusiasts building forced-induction, high-compression, or heavily modified 4AG-GE 16V applications. Made in the U.S.A.