RB Twin Cam Rear Head Drain – Billet Oil Return RB20 RB25 Neo RB26
RB Twin Cam Rear Head Drain – Billet Oil Return RB20 RB25 Neo RB26
RB Twin Cam Rear Head Drain
Billet Oil Return
RB20, RB25, Neo & RB26
Clean oil control is not optional at power — it’s critical.
The RB Twin Cam Rear Head Drain is a high-flow billet solution designed to improve oil and gas return to and from the cylinder head under high RPM and sustained load. Built for serious RB engines, this upgrade helps reduce oil pooling in the head and supports overall engine reliability in performance and motorsport applications.
Engineered specifically for the RB twin cam platform, this drain positions oil return where it belongs—efficient, controlled, and away from heat.
Key Features
- Designed for RB twin cam heads RB20, RB25, Neo & RB26
- Large outlet sizing to support -10AN and -12AN hoses
- Promotes improved oil drain-back from cylinder head
- Helps reduce oil accumulation at high RPM
- Requires 2x M6 threads to be drilled and tapped into the head
- Smart outlet positioning toward the intake side of the engine
- Keeps hoses away from turbo and exhaust heat zones
- CNC machined from 6061 billet aluminum
- Black anodized finish for durability and long-term corrosion resistance
Why It Matters
At higher RPM and under sustained load, RB engines can retain excess oil in the cylinder head. This can lead to:
- Reduced oil availability in the sump
- Increased crankcase windage and oil blow by in the catch can
- Potential oil starvation under extreme conditions
A properly designed rear head drain improves oil return efficiency and stabilises the system under performance use.
Installation Notes
- Requires drilling and tapping 2x M6 mounting points into the rear of the cylinder head
- Designed for straightforward fitment with common AN hose setups
- Recommended for use with -10AN or -12AN return lines depending on build requirements
Application
- High-performance street builds
- Track, drift, and time attack cars
- RB engines running sustained high RPM
- Turbocharged applications requiring improved oil control
Boost Doc, Purpose-built performance solutions for the RB platform.
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