HKS: Head Gasket 1.0, 1.2 & 1.6mm: Evo IV - IX (Standard Spec)
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Details of this specific product are as follows:
The Performance requirement from Head Gasket.
As the cylinder block and head are not rigid body, when the Head Bolts are tightened, the gap between the surfaces and the surface pressure applied is not even across the whole surface. Moreover, due to combustion pressure and vibration while driving, the conditions are continually changing and the contact surface is being continually beaten. As a result, a good gasket must ensure that contact surface pressure is spread as evenly as possible and also adapt quickly to the ever changing gaps that can appear in the contact surface to maintain a good seal with good pressure.
This is the standard duty version gasket for Evo Models IV - IX.
This part number has 4 layers in all thicknesses listed
Stock images used. Actual product may vary.