This 12-volt, 63-amp alternator is a universal-fit aftermarket replacement built to the Delco 10SI series specification, supplied with a 60mm OD 1-V pulley (17mm ID, 10mm width) and a simple 1-wire hook-up for straightforward installation.
It is internally regulated with an external cooling fan (IR/EF) and the plug position is set at 12 o'clock. The unit features high-temperature epoxy, heavy-duty rectifiers and high-quality regulators for reliable long-term charging performance.
Key Features
- Universal Delco 10SI series replacement
- Simple 1-wire hook-up for easy installation
- Comes with 60mm OD 1-V pulley (17mm ID, 10mm width)
- Various 17mm ID pulleys can also be fitted
- 1-year warranty
Technical Specs
| Specification |
Detail |
| Voltage |
12V |
| Amperage |
63A |
| Rotation |
CW (Clockwise) |
| Regulator |
Internal (IR) |
| Fan Type |
External (EF) |
| Pulley Class |
V1 |
| Clock Position |
12 |
| Manufacturer Type |
Delco 10SI series |
Vehicle Fitment Guide
This is a universal-fit alternator, not model specific. Check the specifications above against the unit you are replacing before ordering.
| Make & Model |
Years |
| Universal fitment - Delco 10SI series applications |
N/A |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 400-12453 |
Arrowhead |
| ADR0163 |
Arrowhead |
| 1-2400-11DR |
WAI |
| ALT-1010AS |
NSA |
| 10459509 |
Delco Reman |
| 7127-SE |
Lester |
| 400-12165 |
J&N Electrical Products |
Frequently Asked Questions
Will this fit without modification?
This is a universal Delco 10SI-type replacement - check the mounting dimensions and pulley size above against your original unit before ordering.
What is included?
One complete 12V 63A alternator unit with 60mm OD 1-V pulley fitted, tested before dispatch.
What does 1-wire hook-up mean?
The alternator self-excites from residual magnetism and only needs a single output (battery) wire connected, simplifying wiring versus 2-wire/3-wire units.
How do I know my old alternator has failed?
Common signs are a charge warning light staying on, a battery that won't hold charge, dimming lights, or a whining/grinding noise from the unit.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
