Go Fast Bits GFB

Fits 2002–2010 Subaru WRX and STI

Part #: 2001

Overview

The GFB 02-10 WRX/STI 2 Piece Under-Drive Pulley Kit with Belts is a high-performance upgrade designed for Subaru enthusiasts seeking improved engine responsiveness and acceleration. Crafted from a single billet of 6061-T6 aluminum and precision CNC machined, this lightweight pulley kit reduces the rotational mass of your engine's crank and alternator pulleys, helping your vehicle respond more quickly to throttle inputs. It is ideal for drivers looking to enhance their car’s performance without extensive modifications or tuning, offering a straightforward bolt-on upgrade that delivers noticeable driving benefits. This kit is perfect for those who want to optimize their vehicle’s responsiveness and enjoy a more engaging driving experience. Whether you’re a daily driver or a weekend enthusiast, the lightweight design supports sharper throttle response and faster acceleration, making your Subaru feel more lively and responsive on the road or track.

Key Features

This under-drive pulley kit features a meticulously engineered design focused on reducing engine rotational inertia. Made from durable 6061-T6 aluminum, the pulleys are CNC machined to precise tolerances for a perfect fit and long-lasting performance. The kit includes belts optimized for reliable operation and minimal slip, ensuring consistent power transfer. The lightweight construction not only enhances throttle response but also helps reduce stress on engine components, contributing to improved overall engine efficiency and durability.

• Constructed from high-grade 6061-T6 aluminum for strength and lightness
• Precisely CNC machined for a perfect fit and smooth operation
• Reduces rotating mass for sharper throttle response and quicker acceleration
• Includes belts designed for durability and reliable performance
• Easy bolt-on installation with no need for supporting mods or tuning

Construction & Design

The pulleys are crafted from a single billet of 6061-T6 aluminum, a material known for its excellent strength-to-weight ratio and corrosion resistance. CNC machining ensures tight tolerances and a precise finish, resulting in a component that seamlessly integrates with your vehicle’s existing pulley system. The lightweight design helps improve engine response without compromising durability or reliability.

Driving Feel & Feedback

Installing this pulley kit helps your Subaru deliver more immediate throttle response and a more direct feel during acceleration. The reduced rotational mass allows the engine to rev more freely, providing a more engaging driving experience and a noticeable improvement in responsiveness across various driving conditions.

Installation & Fitment

The GFB Under-Drive Pulley Kit is designed for straightforward installation, requiring only basic tools. It is a direct bolt-on upgrade that fits 2002–2010 Subaru WRX and STI models, with no need for additional modifications or tuning. Proper installation ensures optimal performance and longevity.

What’s Included

The package includes two lightweight pulleys for the crank and alternator, along with belts optimized for performance and durability, providing everything needed for a complete upgrade.