HKS G-Cupring copper sealing ring, 90.8mm, used as a combustion seal in HKS metal head gasket and stopper-ring systems. Provides a durable, high-temperature seal at the cylinder bore for high-boost engine builds. Sold as a single ring.
Specifications
| Type | Copper cup ring (combustion seal) |
| Size | 90.8mm |
| Quantity | Single |
| Part Number | 14999-AK037 |
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