This insert has a lower volume / higher compression ratio, meaning more low and middle range torque. This improves acceleration and gives an increased torque feeling when exiting corners. However, keep in mind that this compromises top speed. The combustion chamber fits the VHM cylinder head perfectly and is easy to change. The last numbers of the part number are engraved on the insert for identification.
Use in combination with VHM head AA33215
Use the insert chart as a general guideline to select the insert depending on the fuel, track and elevation.
- Race fuel or elevation
- For use see insert chart table
- Quick to adjust
The insert does not fit into an OEM head, only a VHM cylinder head.
