RSG Engineered 13B / 20B Electric Water Pump Adapter – REW Alternator Position
RSG 13B / 20B Electric Water Pump Adapter
The RSG Engineered Electric Water Pump Adapter provides a clean and practical solution for converting 13B and 20B engines to a remote electric water pump.
Unlike a basic water-pump block-off plate, the RSG adapter was specifically designed around the complete accessory layout.
The key advantage is the ability to retain the alternator in the original 13B-REW / FD3S position, while also retaining the factory alternator bracket and power-steering mount.
KEY FEATURES
- RSG Engineered
- Designed for 13B and 20B engines
- Electric Water Pump conversion
- Retains alternator in stock REW / FD3S position
- Retains stock REW alternator bracket
- Allows use of stock power-steering mount
- -16AN coolant inlet
- -16AN coolant outlet
- Coolant temperature sensor provision
- Sensor thread: M12 × 1.5
- CNC-machined construction
- Anodized Black
- Designed for remote EWP installations
- Suitable for street, performance and motorsport builds
- Small-batch manufactured by RSG
KEEP THE FACTORY REW ACCESSORY POSITION
This is the feature I would emphasize most strongly on the product page.
The RSG adapter was designed so that converting to an electric water pump does not require relocating the alternator.
You can retain:
✓ Stock REW alternator position
✓ Stock alternator bracket
✓ Stock power-steering mount
This provides a much cleaner EWP conversion for installations where retaining the original REW accessory arrangement is desirable.
-16AN INLET & OUTLET
COOLANT TEMPERATURE SENSOR PROVISION
The adapter includes a dedicated provision for a coolant temperature sensor using the M12 × 1.5 factory-style thread.
This avoids having to add a separate inline sensor housing elsewhere in the cooling system.
Designed for compatible:
- 13B
- 13B-REW
- 20B
- Motorsport cooling systems
ELECTRIC WATER PUMP
The adapter is designed for use with a remote electric water pump.
The electric water pump itself is not included, but can be bought separately.
IMPORTANT
Correct electric water pump sizing, controller strategy, hose routing and cooling-system configuration are the responsibility of the installer.
All AN connections must be correctly assembled and leak-tested before operation.
Worldwide Shipping Available.


