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Air and Fuel Superchargers, Turbochargers and Components

Go Fast Bits

GFB 02-10 WRX/STI 2 Piece Under-Drive Pulley Kit w/ Belts (Crank & Alternator)

$271.00 $243.90 Save $27.10

SKU: G004 2001

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INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: 2001

GO FASTER ADD LIGHTNESS, GFB's Lightweight Pulley Kits offer sharper throttle response and faster acceleration by significantly reducing the rotating mass at the engine. Made from a single billet of 6061-T6 aluminium, then precision CNC machined to exacting tolerances, our pulley kits offer an exceptional bolt-on performance advantage without the need for supporting mods or tuning

Suits WRX/STi MY94-07, Forester MY98-07, Legacy MY03-07).

MIA's Description

The Go Fast Bits (GFB) DV+ Diverter Valve is a high-performance, direct-fit replacement for the weak factory diverter valves in modern European turbocharged vehicles, specifically 1998-2006 Audi/VW 1.8T engines. It replaces the problematic valve components with a robust anodized billet aluminum housing and a precisely machined brass piston, while retaining the efficient OEM solenoid coil. This design significantly improves throttle response, accelerates boost recovery during gear shifts, and resolves boost leaking issues.

Fitment

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Specifications

BrandGo Fast Bits
Part NumberG004 2001

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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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