Engines and Components› Crankshafts and Components

MODE Auto Concepts

Lightweight Underdrive 2 Pulley Kit

$197.00

SKU: gfb-lightweight-underdrive-2-pulley-kit-subaru-wrx-sti-01-02-2001

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The GFB Lightweight Underdrive 2 Pulley Kit is crafted from aircraft-grade 6061-T6 aluminum. The underdrive ratios are optimized to ensure no adverse effects on accessory performance.
Show original supplier description
The GFB Lightweight Underdrive 2 Pulley Kit is constructed from aircraft-grade 6061-T6 aluminum, offering a significant reduction in rotational mass on the crankshaft for improved acceleration. This kit features an underdrive design, which slows down accessories slightly to decrease parasitic losses, making the engine feel more responsive. The underdrive ratios have been carefully optimized to prevent any negative impact on accessory performance. GFB has thoroughly tested these kits to ensure they do not cause engine damage in either the short or long term. The kit includes one crank pulley, one alternator pulley, and two belts. This pulley kit is specifically designed for the 2001-2002 Subaru WRX GD/GG (Bugeye) and the 2001-2002 Subaru STI GDB (Bugeye).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMODE Auto Concepts
Part Numbergfb-lightweight-underdrive-2-pulley-kit-subaru-wrx-sti-01-02-2001
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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