HKS 23001-AM003 Stopper-Type Multi-Layer Steel Metal Head Gasket 86mm Bore 1.0mm

The HKS 23001-AM003 is a Stopper-Type Multi-Layer Steel (MLS) metal head gasket engineered for the Mitsubishi 4G63T engine. Designed specifically for high-horsepower and high-boost applications, this gasket delivers superior sealing integrity where OEM and conventional gaskets fall short.

Construction & Materials:

• Built from multiple layers of corrosion- and heat-resistant steel for long-term durability under extreme engine conditions
• Coated with a special fluorine rubber compound on all sealing surfaces for leak-free performance
• Features the Opposed Bead Stopper design with independent water holes for maximum bore sealing durability
• A molded stopper ring surrounds each combustion chamber opening, maximizing clamping force and preventing blow-out

Specifications:

• Gasket Type: Stopper-Type (Opposed Bead)
• Bore: 86mm
• Thickness: 1.0mm
• Compression Ratio: 8.6 / 8.9:1 (for comparison only — actual ratio achieved will vary by application)
• Water Holes: Independent

Key Features:

• Accommodates standard and select oversized cylinder bores
• Multiple gasket thicknesses available across the HKS lineup for adjusting dynamic compression ratio
• The Stopper-Type design incorporates the maximum number of steel plates of any HKS gasket type, making it the most robust sealing solution in the HKS head gasket range

Note: Compression ratios listed are for comparison purposes only. Actual ratio achieved may vary depending on application. HKS metal head gaskets are not intended to correct sealing issues caused by head or block surface irregularities.