Cometic Honda Prelude B21A1 84mm Bore .045in MLS Head Gasket - C4586-045

The Cometic Honda Prelude B21A1 84mm Bore .045in MLS Head Gasket - C4586-045 is a precision-engineered head gasket with a 84mm bore and .045" compressed thickness.

The Cometic Multi-Layer Steel (MLS) head gasket is engineered for high-performance and racing applications where OEM gaskets fall short. Featuring Multi-Layer Steel (MLS) construction, this gasket uses multiple embossed steel layers that conform to surface irregularities and maintain a positive seal. Precision CNC-machined to exacting tolerances, this gasket seals combustion, water jackets, and oil passages simultaneously — eliminating the need for multiple gaskets or sealing compounds.

• Material: Multi-Layer Steel (MLS)
• Bore Size: 84mm
• Thickness: .045" compressed
• Part Number: C4586-045

Verified fitment: Honda Prelude (1990–1991).