In JUN MACHINE SHOP, the various head parts for H22A engine were produced commercially, and sale was started.

These products are the things which have performed the wearing test over a long period of time in JUN SUPER LEMONE PRELUDE other than a test on an engine bench, and the effect was proved from the street to the circuit run on the broad stage.

It is taking into consideration equipping simultaneously as a camshaft kit and thought total balance as important.

It was considered as the profile which can use effectively a V-TEC mechanism peculiar to the HONDA vehicle. Power up and feeling up is realized at the whole region which low-high rpm. Even after cam exchange, the ease of treating in a low rotation region can be realized and It was realized that high performance and practicality.

When engine turns by high rotation, valve surging phenomenon happens so a valve becomes unable to follow to a motion of a cam. In order to prevent this phenomenon, the strengthening valve spring which raised the spring rate of a spring was developed. It corresponded to the normal cam shaft and JUN cam shaft, and considered as the design which can get the optimum load. When use a cam with the big amount of lifts, such as a JUN high lift cam shaft, you need the strengthening valve spring.

Strengthening a valve spring and using light weight valve retainer prevents valve surging. JUN VALVE RETAINER is used titanium material which has light specific gravity and high hardness. It was made very lighter than normal, without spoiling hardness.

By equipping with a CAMCHAFT, the valve spring for which exchange is needed, VALVE RETAINER, and the CAM SPROCKET were released as the kit with reasonable. It can choose by budget or the purpose.