GFB Lightweight Underdrive 2 Pulley Kit – Subaru WRX (GD/GG) STI (GDB) MY01-02

GFB Lightweight Underdrive 2 Pulley Kit – Subaru WRX (GD/GG) STI (GDB) MY01-02

Application: Subaru WRX (GD/GG) STI (GDB) MY01-02
Part Type: Lightweight Underdrive 2 Pulley Kit

GFB builds its pulley kits from aircraft grade 6061-T6 aluminium, cutting rotational mass off the crankshaft to sharpen throttle response and get the engine revving more freely. For the Subaru WRX and STI Bugeye models, this underdrive kit reduces parasitic losses at the crank and alternator without compromising accessory performance, giving the engine a livelier, more eager feel similar to fitting a lighter flywheel.

This listing covers the Subaru WRX (GD/GG) and STI (GDB), model years MY01-02 (Bugeye). The kit is sold as a single configuration covering both crank and alternator pulleys, so there's no variant selection required on this listing.

Kit Contents

• 1x lightweight underdrive crank pulley
• 1x lightweight alternator pulley
• 2x drive belts
• Constructed from 6061-T6 aluminium
• Underdrive ratios application tested to avoid harmonic or accessory issues

Vehicle Fitment

• Subaru WRX (GD/GG) STI (GDB) MY01-02

Please ensure your vehicle's year and model configuration are confirmed before ordering.