Under-Drive & Lightweight Pulley Kits - GFB

GFB lightweight pulley kits are made from aircraft-grade 6061-T6 aluminium and offer faster acceleration through significant weight reduction on the crankshaft. The effect is similar to a lighter flywheel, and the car feels more lively and willing to rev.

Most of our kits are underdriven, which means the accessories are driven slightly slower to reduce parasitic losses. It should be noted that our underdrive pulley kits do NOT adversely affect the operation of the accessories. If they did, we would not sell them!

GFB 2pc Subaru Pulley Kit to fit ALL WRX Models MY93-MY08 & 98-02 B4 Legacy (Twin Turbo)

Crank & Alternator Pulley's with Replacement Belts

Part # 2001

GFB 3pc Subaru WRX Pulley Kit to fit MY99-MY00 &SF 01-02 Forester

Crank, Alternator & Powersteering Pulley's with Replacement Belts

Part # 2002

GFB 3pc Subaru WRX Pulley Kit to fit MY93-MY98 & SF 98-00 Forester 

Crank, Alternator & Powersteering Pulley's with Replacement Belts

Part # 2003

GFB 3pc Subaru WRX Pulley Kit to fit MY03-MY07 & SG 05-08 Forester 

Crank, Alternator & Powersteering Pulley's with Replacement Belts

Part # 2010

Subaru WRX Pulley Kit to fit MY08 on + 03-09 GTB Legacy (GFB 3pce) 

Crank, Alternator & Powersteering Pulley's with Replacement Belt

Part # 2014

GFB Subaru BRZ Lightweight Pulley Kit (Sicon FR-S / GT86)  

Crank, Alternator & Powersteering Pulley's - Replacement Belts NOT Needed 

Part # 2016

This kit is supplied with 3 pulleys not just for looks - the combined saving of 4.9 lbs (2.2 kgs) is significantly more than what is achieved by replacing just the crank pulley alone.

The weight doesn’t tell the whole story either - even though the saving is a significant 77%, the actual rotating inertia reduction (inertia is what counts) is 83%

GFB Subaru Lightweight Crank Pulley to fit ALL EJ20 & EJ25 Engines - (Non Underdrive) 

Lightweight Crank Pulley Only

Part # 2009

GFB Z32 300zx Under-drive Crank Pulley - VG30DETT & DE 89-00

Part # 2006

Mitsubishi EVO 4-9 Under-Drive Crank Pulley (Lightweight)

Part #2011

New from GFB is the Under-drive Crank Pulley for the Mitsubishi EVO VIII & IX. Like all GFB pulleys, the material used is 6000 series aluminium alloy billet, which nets a large weight saving of 1.4 kg over the factory pulley, without sacrificing strength or reliability.

The kit comes complete with the required serpentine belt, and installation is dead easy – no specialized tools are required and it can be done in as little as 30 minutes. The accessories are under-driven by 20%, which does NOT compromise their performance at low RPM, but does help reduce parasitic losses at high RPM.

Like all GFB lightweight under-drive pulleys, the improvement to the car is felt in the form of sharper throttle response (particularly off boost), and the engine feels more willing to rev. A useful comparison is the difference between performance on a cool evening vs. a warm day, or having the A/C off vs. on.

Mazda 12A / 13B Twin V-Belt Alternator Pulley

Part # 2215

This is a replacement alternator pulley to suit early 12A and 13B rotaries through to series 5 RX-7 (vehicles with 15 mm alternator shaft). It allows a second v-belt to be added for improved reliability, particularly on high-revving engines. Two alternator belts of the same size as the original are required. Note – does not change the drive ratio of the alternator. Benefits•Eliminates belt slip on the alternator/water pump/cooling fan pulleys•Shares the load between two belt•Back-up belt if one belt fails Application List* Mazda 12A Rotary (Early)* Mazda 13B Rotary Available in Red, Blue and Silver.

VW Golf & Audi Crank Pulley

Part # 2012

Suits the following cars with the 2.0L turbo FSI engine:

• Audi A3 (8P)

• Audi TT and TTS (8J)

• VW Golf GTi (Mk5) and Golf R

• VW Jetta (Mk5)

• VW Passat (B6)