Price: $156.20

The Racing Beat-manufactured Street High Performance Rear Oil Pressure Regulator for the RX-8 interchanges exactly with the stock rear oil pressure regulator on all 2004-2008 Renesis engines. It is designed to bypass at 90-95 PSI, making it well suited for street-ported Renesis engines.

The Racing Beat high performance Rear Oil Pressure Regulator is designed for use on 2004-08 RX-8 Renesis engines and interchanges exactly with the stock unit. As supplied by Mazda, the factory pressure regulator is intended to bypass at maximum nominal rate of 80 PSI. For use on higher performance street applications the Racing Beat regulator can be substituted, which bypasses at a higher maximum nominal rate of 90-95 PSI.

As a general rule, oil pressure should be increased as the horsepower output and engine RPM increases. As horsepower and RPM demands increase, it is beneficial to have higher oil pressure between the shafts and bearings to prevent possible catastrophic contact between spinning components. Additionally, as oil pressure is increased, flow rate also increases - hence, more oil is available to cool the bearings and rotors.

Tech Notes:

- The 2009-2011 RX-8 Renesis engine is not equipped with a rear pressure regulator. Nominal oil maximum oil pressure on this application is 110-115 PSI. We do ot offer a regulator to increase the oil pressure on this application.