Billet Aluminium Top Pulley Pulley Nut And Washer

This special chrome pulley nut and washer set is designed specifically for use with billet aluminium top pulleys, providing a secure fixing while delivering a high-quality custom finish to your engine bay. Manufactured to suit billet pulley designs, this kit ensures correct fitment and reliable clamping force where standard pulley hardware will not work.

Unlike factory pulleys, billet top pulleys (such as part numbers AC903112B and AC903112C) often require a different nut profile and seating surface. This chrome nut and matching washer are engineered to suit those pulleys, ensuring proper alignment and secure fastening to the generator or alternator shaft. The washer helps distribute load evenly across the pulley face, preventing damage and maintaining correct belt alignment.

The chrome finish not only provides corrosion resistance but also enhances the appearance of your engine, making it ideal for show cars, restorations, or detailed performance builds. It is a small but important component that ensures your pulley system remains secure under engine load and belt tension.

Installation is straightforward, but it is important to ensure the pulley, belt, and shims (where applicable) are correctly set up to maintain proper belt tension. Always check compatibility before installation, as this kit is not suitable for standard factory pulleys.

Supplied as a nut and washer set.

Vehicle Fitment

Aircooled VW (Billet Pulley Applications Only):

• Beetle (1960–1979) – All engines with billet top pulley
• Beetle Cabriolet (1960–1979)
• T2 Split Bus (1960–1967)
• T2 Bay Window (1968–1979)
• Karmann Ghia (1960–1974)
• Trekker (1968–1983)
• Buggy / Baja (Type 1 based, 1960–1979)

Fits billet top pulleys only (e.g. AC903112B, AC903112C). Not compatible with standard pulleys.

Key Features

• Chrome pulley nut with matching washer
• Designed specifically for billet top pulleys
• Ensures correct fitment and secure fastening
• Washer distributes load and protects pulley surface
• Improves engine bay appearance with chrome finish
• Not suitable for standard factory pulleys