Go Fast Bits Lightweight Pulley Kit

2013–2016 Scion FR-S, 2017–2020 Toyota 86, 2013–2020 Subaru BRZ

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Overview:

The Go Fast Bits Lightweight Pulley Kit is a comprehensive upgrade designed specifically for the Scion FR-S (2013–2016), Toyota 86 (2017–2020), and Subaru BRZ (2013–2020). This kit includes lightweight crank, alternator, and water pump pulleys engineered to reduce rotational mass and improve engine responsiveness. Ideal for enthusiasts seeking sharper throttle response and a more willing revving engine, this kit delivers noticeable performance benefits without compromising reliability.

Unlike single pulley replacements, this complete set offers a significant combined weight reduction, enhancing acceleration and engine feel. It is a perfect choice for drivers looking to optimize their vehicle’s performance with a high-quality, precision-engineered component.

Key Features:

The Go Fast Bits Lightweight Pulley Kit stands out for its engineering excellence and performance advantages. Key features include:

• Complete kit includes crankshaft, alternator, and water pump pulleys for a full upgrade
• Constructed from 6061-T6 aluminum alloy billet for superior strength and lightness
• Precision CNC machined to exacting tolerances for perfect fit and function
• Black anodized finish provides a stealthy look and enhanced wear resistance
• Reduces pulley weight by approximately 2.2 kg, a 77% reduction in mass
• Achieves an 83% reduction in rotating inertia, improving throttle response
• Uses the original factory belt—no need for additional belt replacements
• Thoroughly application tested to avoid harmonic issues or engine damage
• Manufactured in Australia under ISO 9001 quality standards

Construction & Design:

Each pulley in the kit is crafted from a single billet of 6061-T6 aluminum alloy, known for its excellent strength-to-weight ratio and durability. The CNC machining process ensures each pulley meets strict dimensional tolerances, guaranteeing smooth operation and long-lasting performance. The black anodized coating not only enhances corrosion resistance but also adds a sleek, understated appearance under the hood.

This meticulous construction results in a lightweight yet robust pulley set that withstands the rigors of daily driving and spirited performance use alike.

Performance & Sound

By significantly reducing the rotational mass of the belt train, the Go Fast Bits Lightweight Pulley Kit improves engine responsiveness and acceleration. The effect is similar to that of a lighter flywheel, allowing the engine to rev more freely and deliver power more promptly. Drivers will notice a sharper throttle response and a stronger urge in the engine’s willingness to rev, enhancing the overall driving experience.

While the kit focuses on performance gains, it does not adversely affect engine harmonics or cause long-term damage, thanks to extensive testing and engineering validation.

Installation & Fitment:

Installation is straightforward and designed to be a direct replacement for the factory pulleys. The kit uses the original factory belt, so no additional modifications or belt replacements are necessary. This ensures a hassle-free upgrade that fits perfectly on the Scion FR-S (2013–2016), Toyota 86 (2017–2020), and Subaru BRZ (2013–2020) models.

Professional installation is recommended to ensure proper torque settings and alignment, but experienced enthusiasts can perform the upgrade with standard automotive tools.

What's Included:

• Lightweight crankshaft pulley
• Lightweight alternator pulley
• Lightweight water pump pulley
• Installation instructions (where applicable)

Ideal For:

This pulley kit is ideal for performance enthusiasts and daily drivers alike who want to enhance throttle response and engine liveliness without extensive modifications. It suits owners of the Scion FR-S, Toyota 86, and Subaru BRZ who seek a reliable, high-quality upgrade that delivers tangible driving improvements while maintaining factory reliability and fitment standards.

Go Fast Bits (GFB) is an Australian company specializing in turbo management products, including blow-off valves, boost controllers, diverter valves, and pulley kits. Their products are designed to enhance the performance and reliability of turbocharged engines, targeting both street enthusiasts and track racers seeking improved throttle response and boost control.