HKS Head Gasket for 4G63 Evo 4-9




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HKS head gaskets for the 4G63 Evo 4-9 are available in 3 thicknesses to accomodate different compression ratios. Please select the proper gasket in the purchase menu.

Vehicle Fitment:
1996-2006 Evolution IV V VI VII VIII IX

• Multi-layer steel
• Resistant to heat and corrosion
• Fluorine rubber coating

(1) Head Gasket

Part Number: Bore Size: Thickness: Compression Ratio:
23001-AM003 86mm Bore 1.0mm 8.9:1
23001-AM004 86mm Bore 1.2mm 8.8:1
23001-AM005 86mm Bore 1.6mm 8.5:1

HKS Stopper Type Head Gasket:
A high pressure seal is formed around the combustion chamber through the use of stoppers which create a step within the gasket for optimum sealing. By making the stopper part of the plate also allows the fold to be smaller while maintaining structural integrity. One side of the plate is completely flat meaning that it can be layered with the stopper to allow stoppers to be used in even the tightest of locations around the combustion chamber forming a high quality seal. Compared with other gaskets of the same thickness, there are more layers in these gaskets giving flexibility which allows the gasket to maintain a good seal even when the engine tries to vibrate and move.

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