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

SKU: GFB2001

Pulley Kits

GFB Pulley Kits...

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

GO Fast Bits

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

SKU: GFB2001

Pulley Kits

GFB Pulley Kits...

Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.

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Description

It might be hard to imagine how reducing the mass of a pulley makes a car go faster, but accelerating a heavy factory pulley from say 3000-7000 RPM in a second or two saps a measurable amount of torque. GFB Lightweight Pulleys reduce inertia by up to 85%, so most of the torque that used to accelerate the pulley can now be applied to the wheels.

Application Summary

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

Part Type

Engine Under Drive Pulley Kit

Data: v4.2 - Upd: 2026-10-13 15:13:46

Features

SHARPER THROTTLE RESPONSE AND "URGE", ENGINE FEELS MORE LIVELY AND WILLING TO REV, UP TO 85% ROTATING INERTIA REDUCTION, WILL NOT CAUSE ENGINE DAMAGE, NO NEGATIVE EFFECTS ON DRIVEN ACCESSORY PERFORMANCE

Specifications

Product Attributes - Brand: Go Fast Bits
Product Attributes - Manufacturer's Part Number: 2001
Product Attributes - Part Type: Pulley Kits
Product Attributes - UPC: 9328022001838

Reference Information

Brand Name/s	GO Fast Bits
StreetFX SKU	gfb2001
SFX Item ID	4415568
Supplier Item Code	4415568
Manufacturer SKU	2001
Manufacturer UPC	9328022001838
Alternative References	gfs-2001