Cometic C5582-040 Chrysler Race Block MLS Cylinder Head Gasket Bore - R3 4.185 W7/W8/W9

The Cometic C5582-040 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for the Chrysler R3 Race Block with a 4.185" bore, designed for use with W7, W8, and W9 cylinder heads. At a compressed thickness of .040", this gasket is purpose-built for high-output racing engines that demand a reliable, leak-free seal under extreme cylinder pressures.

Key Features:

• Multi-Layer Steel (MLS) construction — multiple embossed layers of spring stainless steel for superior strength and durability
• Viton-coated outer layers — both sides coated with Viton fluoroelastomer rubber, heat resistant to 250°C (482°F) for a superior seal
• No sealants required — gasket installs dry thanks to the integrated Viton coating
• 4.185" bore diameter — precisely sized for the Chrysler R3 Race Block
• .040" compressed thickness — optimized for race engine compression ratios
• Compatible with W7, W8, and W9 heads
• Ideal for mixed-material combinations — aluminum heads to aluminum blocks, or aluminum heads to cast iron blocks
• Resists bore distortion — MLS design minimizes bore distortion for improved ring seal
• Corrosion resistant — stainless steel construction provides excellent resistance to coolant and combustion byproducts
• Sold individually

A surface finish of 50 RA (roughness average) or finer is recommended for proper gasket sealing. These gaskets are not designed for use on engines with O-rings or receiver grooves. Cometic MLS head gaskets are the trusted choice of professional and amateur racing engine builders across drag racing, oval track, and road racing applications.