Stage X EJ20/25 Single AVCS Head-Kit

High-end cylinder heads ideal for use in motorsport / tuning.

The cylinder heads have the following modifications:

CNC milled inlet channels

CNC milled exhaust ducts

intake channel with golf ball surface

CNC milled combustion chamber

Bronze beryllium valve guides

Bronze beryllium valve seats

CNC cut valve seats

Valve seats inlet / outlet cut to +1 mm

By using bronze beryllium valve seats and guides, more heat can be dissipated.

This optimizes the combustion chamber temperature and ensures greater stability.

The CNC cut valve seats improve the flow through the channel and are a perfect complement to the milled channels.

With the help of the golf ball surface, a more homogeneous mixture is achieved.

Our developed combustion chamber reduces the tendency to knock and thus allows higher boost pressure.