4P K20C1 Type R Vacuum Pump Delete EVO 8/9 The piston and ring package

The piston and ring package are specifically designed for this engine to provide superior ring seal and extended use in abusive conditions

We didn't just put effort in on the flow bench

Ultra 4 - Aggressive high compression race engine still utilizing 3 lobe VTEC function

ARP and 4 Piston are proudly engraved on the head of the bolt

adds protection against catastrophic events

4P K20C1 Type R Vacuum Pump Delete EVO 8/9 The piston and ring packageThe 4P vacuum pump delete plate allows you to remove the OEM vacuum pump. This is common in race cars and dry sump oiled engines. Simply remove the OEM vacuum pump and install the 4P Block off plate in its place.