•  A lightweight aluminum alloy cylinder head with good thermal conductivity has been adopted.

•  A plastic region bolt has been adopted as a cylinder head bolt providing constant high axial force (tightening force).

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•  Sufficient swirl can be generated even with low engine speed due to the bending of the port.

•  Due to the adoption of 4 valves, the opening area has been increased and the charging efficiency improved.

•  The smooth curved intake port reduces intake resistance.

•  Locating the fuel injector on the center of the cylinder head provides consistent fuel injection in the combustion chamber, and in conjunction with the swirl generated in the double-tangential port, production of a balanced air-fuel mixture has been realized.

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1	Exhaust port
2	intake port
3	Fuel injector
4	Port layout
5	Intake port cross-section

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1	Fuel injector installation