Perrin Performance Alternator Pulley
2013–2020 Subaru BRZ / 2017–2020 Toyota 86 / 2013–2016 Scion FR-S
PSP-ENG-121RD
Overview:
The Perrin Alternator Pulley is a precision-engineered upgrade designed to enhance the efficiency and responsiveness of your Subaru BRZ, Toyota 86, or Scion FR-S. Crafted from lightweight 6061-T6 aluminum, this pulley reduces the rotational mass compared to the factory steel unit, allowing your engine to rev more freely and deliver quicker throttle response. Whether you are a daily driver seeking subtle performance improvements or a track enthusiast aiming for optimized engine dynamics, this pulley offers a reliable and effective solution without compromising your vehicle’s charging system functionality.
Installation is straightforward, as the pulley is designed to be a direct replacement for the OEM part, requiring no additional modifications or tuning. This makes it an ideal upgrade for anyone looking to improve engine response with minimal effort.
Key Features:
The Perrin Alternator Pulley combines high-quality materials and thoughtful design to deliver performance benefits while maintaining durability and fitment precision.
- Constructed from CNC-machined 6061-T6 aluminum for strength and lightweight performance.
- Durable anodized finish available in Perrin’s signature colors for corrosion resistance and visual appeal.
- Reduces rotational mass compared to the OEM steel pulley, improving throttle response and engine revving characteristics.
- Direct bolt-on replacement with no need for tuning, modifications, or special tools.
- Compatible with both OEM and aftermarket serpentine belts for versatile use.
- Maintains full charging system functionality, ensuring reliable electrical performance.
Construction & Design:
The pulley is precision-machined from high-grade 6061-T6 aluminum, a material known for its excellent strength-to-weight ratio and resistance to wear. The CNC machining process ensures tight tolerances and a perfect fit, matching the OEM pulley’s dimensions exactly. The anodized finish not only enhances corrosion resistance but also provides a sleek, durable surface that withstands the harsh conditions under the hood.
By reducing the pulley’s mass, the engine experiences less rotational inertia, which translates to quicker revving and improved throttle response. This subtle enhancement supports better engine efficiency without compromising reliability or requiring additional engine management adjustments.
Installation & Fitment:
The Perrin Alternator Pulley is designed as a direct replacement for the factory pulley on the following vehicles:
- 2013–2020 Subaru BRZ
- 2017–2020 Toyota 86
- 2013–2016 Scion FR-S
Installation is simple and straightforward, requiring only standard hand tools. No cutting, drilling, or special tuning is necessary, making it accessible for both professional installers and knowledgeable enthusiasts. The pulley fits perfectly with OEM and aftermarket belts, ensuring seamless integration with your vehicle’s existing components.
What's Included:
- Precision-machined Perrin Alternator Pulley
- Installation instructions
Ideal For:
This alternator pulley upgrade is ideal for:
- Performance enthusiasts seeking improved throttle response and engine efficiency.
- Daily drivers wanting a subtle, reliable enhancement without complex modifications.
- Track-focused builds where every reduction in rotational mass contributes to better engine dynamics.
- Owners of Subaru BRZ, Toyota 86, or Scion FR-S models within the specified year ranges looking for a direct-fit performance part.
