This 16-Volt 55 Amp alternator is specifically engineered for the rigorous demands of competitive racing. Built into a compact 93mm "Super Mini" Denso-style housing, it provides the increased voltage required for high-performance ignition systems, ensuring hotter sparks and more reliable electronics under extreme loads. Its lightweight design and efficient internal cooling make it the preferred choice for dragsters, circle track cars, and custom builds running 16V batteries.
RACING OPTIMIZED: Designed for true 1-wire operation with an internal regulator set for 16V DC systems (typically charging at 18V-18.5V).
Key Features
✔ Ultra-compact 93mm Denso Style case
✔ Easy 1-Wire self-exciting hookup
✔ Lightweight design (approx. 6 lbs)
✔ Internal regulator & dual internal fans
Technical Specs
Voltage:
16V DC
Amperage:
55 Amps
Rotation:
Clockwise (CW)
Pulley Style:
1-Groove V-Belt
Shaft Diameter:
15mm (0.590")
Mounting:
93mm Pivot Bolt Pattern
Compatibility / Fitment Guide
Application Type
System Requirements
Notes
Drag Racing
16V Battery Setup
Universal Fitment
Circle Track
High-Voltage Ignition
93mm Bracket Mounting
Custom Performance
Self-Exciting (1-Wire)
For 16V systems ONLY
OEM Cross Reference
Arrowhead
AND0621
Powermaster
28166, 8166, 8168, 8176
J&N
400-52266
Denso (Base Style)
100211-1680 (Ref Only)
Questions & Answers
Is this a genuine original part?
This is a premium quality 4Drive aftermarket replacement part, manufactured to meet or exceed Powermaster and Denso racing standards for fitment and high-voltage performance.
How do I know if it is compatible?
This unit is specifically for 16-Volt systems. If your original racing alternator is a Powermaster 28166, 8166, or 8168, this is a direct-fit replacement.
Can I use this on a standard 12V vehicle?
No. This alternator is designed exclusively for 16V racing systems. Using this on a 12V system will damage your battery and vehicle electronics.
Note: 4drive.co.uk recommends verifying your existing part number and electrical system voltage (16V) before purchase to ensure correct fitment.
