Engines and Components› Crankshafts and Components

MODE Auto Concepts

Underdrive 3 Pulley Kit

$365.00

SKU: gfb-lightweight-underdrive-3-pulley-kit-subaru-wrx-08-14-sti-08-21-fxt-08-13-lgt-04-12-2014-kit

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 3 Pulley Kit is constructed from anodized aircraft-grade billet 6061-T6 aluminum. It offers sharper throttle response and a more lively engine feel.

This kit includes a crank pulley, an alternator pulley, a power steering pulley, and one belt. The original factory A/C belt can be re-used with this kit.
Show original supplier description
This design enhances engine responsiveness, leading to sharper throttle response and quicker acceleration, making the engine feel more eager to rev, akin to the effect of a lighter flywheel. GFB has thoroughly tested these applications to avoid harmonic issues sometimes associated with lightweight pulleys, ensuring no short or long-term engine damage. This comprehensive kit includes (1) Crank Pulley, (1) Alternator Pulley, (1) Power Steering Pulley, and (1) Drive Belt. The original factory A/C belt is compatible and can be re-used. Vehicle Fitment: * SUBARU XT MY09-13 * SUBARU STi MY08-13 * SUBARU WRX MY08-14 * SUBARU GT BL-BP EJ255 MY06-09 * SUBARU GT BL-BP EJ20T MY03-06 * SUBARU GT MY03-06 * SUBARU STi 2014-22 (EJ25 engine)

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-3-pulley-kit-subaru-wrx-08-14-sti-08-21-fxt-08-13-lgt-04-12-2014-kit
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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