Cometic C5454-027 Chrysler Hemi MLS Cylinder Head Gasket Bore Thick - Gen-2 4.280 027

The Cometic C5454-027 is a Multi-Layer Steel (MLS) cylinder head gasket designed for the Chrysler Gen-2 Hemi engine. Featuring a 4.280-inch bore and a compressed thickness of .027 inches, this gasket is engineered to deliver a high-performance seal for naturally-aspirated, boosted, and nitrous-fed applications.

Key Features:

• Material: Multi-Layer Steel (MLS) construction with 3 layers of spring stainless steel
• Bore Size: 4.280 inches
• Compressed Thickness: .027 inches
• Bore Shape: Valve pocketed for proper clearance
• Viton-coated outer layers provide a superior combustion and coolant seal
• Excellent rebound qualities resist corrosive substances and reduce bore distortion
• Installs dry — pre-coated with sealant; no additional sealer required or recommended
• Withstands extreme cylinder pressures without requiring locking wire machining
• Proudly made in the U.S.A.
• Sold individually

A surface finish of 50 RA (roughness average) or finer is recommended for a proper seal. These gaskets are not designed for use on engines with O-rings or receiver grooves. Cometic is an exclusive NASCAR Performance Product supplier, and this gasket meets the same rigorous standards used in professional racing applications.