RB25, RB26, RB30 Electric Water Pump (EWP) Kit – Optimal Cooling
RB25, RB26 & RB30 Electric Water Pump Kit
Upgrade the cooling-system setup on your RB25, RB26 or RB30 engine with this complete electric water pump (EWP) kit.
The kit is designed to replace the factory mechanical water pump and provides an electronically controlled cooling solution using a Davies Craig controller.
Key features
- Complete EWP installation package
- Davies Craig standalone control box
- No ECU connection required for the controller
- Pump and fan operation can continue after engine shutdown
- Approximate 10 amp current draw
- Controller can be configured for different cooling strategies and temperature settings
Pump & Installation Options
- Standalone control — the Davies Craig controller operates independently of the ECU.
- Coolant temperature control — settings can be adjusted to suit different engine and cooling-system configurations.
- Angled pump mount — available for RB25 and RB26 applications to help avoid intake-manifold interference.
- Bleed nipple provision — 1/8 NPT bleed nipple option for removing air during the initial coolant fill. Drilling and tapping are required.
- LS alternator setup — a shorter belt may be required; the existing Boost Doc fitment information references approximately 4PK-760.
- Custom colours — personalised pump-unit colours are available.
Fitment
Engine applications
- RB25
- RB26
- RB30
Replaces OEM mechanical water pump references
- 21010-21U26
- 21010-24U27
- 21010-RHR30
Heater hose plumbing: Connect the heater return hose to the top radiator hose to maintain the factory-style flow path.
Looking for more RB cooling upgrades? Browse our RB Cooling Parts & Kits collection.
🔧 Upgrade your RB cooling setup with an electric water pump kit designed for RB25, RB26 and RB30 applications
Check out the YouTube video on these.
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Boost Doc prides itself on customer service, and we want happy customers and will provide a repair, replacement or refund for faulty products.
We will not refund if you simply changed your mind, found it cheaper somewhere else, decided you did not like the purchase or had no use for it.
But you can choose a refund or replacement if an item is found to be faulty.
