RCM 4 Stage Dry Sump System EJ20/22/25

A key concern with any Subaru EJ engine, which has been tuned for performance or race use, is that of a reliable oil supply. A Dry Sump System can offer levels of safety and reliability which cannot be achieved when utilising a standard or even baffled wet sump configuration.

The RCM system completely scavenges the crankcase, which dramatically reduces the residual oil left in the crankcase and ensures the maximum amount of oil is returned back to the tank at all times.

This dry sump system can deliver a far more consistent oil pressure to the engine, eliminating the oil starvation issues which are associated with the flat 4 boxer type engine configuration. In addition to this the increased scavenge effect in the crankcase improves the ring to bore sealing properties.

This latest generation 4 Stage RCM dry sump system has been developed with world renowned motorsport engineering specialist Auto Verdi Racing. With multiple NASCAR titles alongside other major championship series already won using Auto Verdi components, this kit provides the same level of performance for your engine as those competing at the very highest level of motorsport.

Throughout the 15 year history of our RCM Gobstopper race car programme our technicians have utilised the benefits offered by dry sump oiling systems on the Subaru engine platform. Constantly striving for perfection through extensive testing and development to ultimately improve both the performance and reliability of these systems has now culminated in the release of this new RCM 4 Stage Dry Sump System.

By incorporating 3 ultra-efficient scavenge stages and 1 pressure stage neatly packaged in a comprehensive and convenient layout specific to the EJ engine range we are confident our system not only provides the best in Subaru oiling performance but the most user friendly installation on the market! The RCM system can easily be installed without the requirement to remove the engine from the car too!

Included in the kit is the RCM3485, the RCM Black series 2 port water pump kit.

This assembly features a corrosion resistant satin black finish designed to absorb excess heat which is then circulated into the cooling system. Water is pumped around the engine using the favoured cavitation friendly cast impellor maximizing the flow of water without unwanted aeration.

The pump also includes the stunning corrosion resistant billet aluminium thermostat housing allowing the smooth and efficient movement of coolant.

Also included is water pump gasket, thermostat seal, thermostat housing and bolts and pumps housing bolts.

When used in conjunction with the RCM Dry Sump Under Bonnet Installation Kits the RCM Dry Sump kit offers unrivalled performance and reliability.

For Subaru Impreza GC8 & GF8 vehicles, please see kit RCM2670.

For New Age Impreza 2001-2007 vehicles please see kit RCM3300.