HKS Metal Head Gasket t=1.2mm b=75.0mm

To improve the performance of CR-Z using the factory Head gasket, the factory bore sealing proof stress restricts the improvement.

HKS GT Supercharger Kit can make the CR-Z a high performance hybrid car by installing the HKS Metal Head Gasket Kit. This kit includes the exhaust manifold gasket to be durable under using the gasket with the vehicle equipped with the supercharger which generates high EGT.

This Kit was developed to upgrade the engine internals during developing the HKS GT Supercharger 7040 Pro kit.

Feature

• High engine output parts. Factory replacement type.
• The shape of the exhaust gasket is the same as the factory gasket.
• Improved the bore seal proof stress at high engine output and boost pressure by redesigning the structure without upgrading the Head Bolt. (Bore seal pressure of the contacted surface was improved by 20%)
• In-house test at 300PS confirmed the durability and safety.
• 2 types of the Head gasket kit are available; the 0.8mm type is for the factory replacement, and the 1.2mm type for the compression ratio adjustment.
• The Exhaust Manifold Gasket uses the 3-layer seal bead design (t=0.6). (The factory is 2-layer design (t=0.4))
• The bore size is enlarged to 75.0mm from the 74.0mm factory gasket bore size.

• To maintain the bore seal proof stress, the stopper's height was adjusted. Narrowing the width enables the high proof stress with the factory Head Bolt axial tension. Also, optimizing the bead plate's angle of the oil and water cooling sealing part improved the sealing's contact pressure without affecting the bore sealing's contact pressure. Fully coated gasket's surface can improve the rigid connection of the cylinder head and block when installing the gasket.
• The 3-layer exhaust gasket improves sealing durability to be used under high exhaust pressure.

HKS put all their know-how knowledge into engine parts from the data they have acquired from the drag race, round race, time attack and drift race. The HKS team provide Engine tuning ranging from Camshafts, Pulleys, Pistons and Rods to Timing Belts, Pump Upgrades and even Head Gaskets. The concept behind HKS engine products was to produce something the customers would truly be happy with.