4.180 MLS RH Head Gasket .040 - SBF Yates

The Cometic Gaskets 4.180 MLS RH Head Gasket .040 - SBF Yates is a precision multi-layer steel cylinder head gasket engineered for small block Ford (SBF) engines, specifically designed for Yates cylinder head applications and right-hand (passenger) side installation. Built for serious engine builders and enthusiasts performing high-performance modifications, this gasket delivers the sealing integrity required in rebuilt, stroked, or forced-induction SBF platforms where OEM gaskets fall short. Whether you're assembling a street rod, competition engine, or daily-driven modified small block, this gasket bridges the gap between factory durability and aftermarket performance demands.

The .040-inch compression thickness and 4.180-inch bore specification are critical parameters that directly affect combustion chamber pressure, ring seal quality, and quench distance—all variables that influence peak horsepower delivery and engine longevity. Cometic's multi-layer steel (MLS) construction uses alternating elastomer-coated steel layers to maintain gasket crush under extreme cylinder pressures while preventing blow-by and coolant leakage at the head-block interface. This design excels in applications where cylinder pressures exceed 100 psi or thermal cycling is aggressive, making it ideal for turbo, supercharged, or naturally aspirated builds running higher compression ratios. The gasket's thickness tolerance ensures proper combustion chamber volume and maintains original quench characteristics when installed with compatible cylinder heads and blocks.

Mechanics and engine builders targeting Yates head platforms—known for flow capability and high-rpm reliability—will find this right-side gasket essential during complete engine assembly or head replacement on small block Ford engines from 221 to 302 cubic inches. Proper installation requires a clean, flat deck surface and torque-to-yield or conventional fastening per your engine's specifications; verify your cylinder head and block configuration before ordering to ensure bore diameter compatibility. This individual gasket ships ready to use and pairs seamlessly with its left-side counterpart for complete head gasket setups on dual-head SBF platforms.