Go Fast Bits VW/Audi Golf GTI Mk5 (2.0t FSI engine) Lightweight Engine Pulley

GFB lightweight pulley kits are made from aircraft-grade 6061-T6 aluminium and offer faster acceleration through significant weight reduction on the crankshaft.Most of our kits are underdriven, which means the accessories are driven slightly slower to reduce parasitic losses. GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) on the crankshaft as well as parasitic loads from the driven accessories. The effect is similar to a lighter flywheel, and the engine feels more lively and willing to rev.We know that people are sometimes concerned about possible adverse effects of lightweight pulleys and underdriving, but rest assured we have done our homework! The underdrive ratios have been optimised to ensure there are NO adverse effects on the performance of the accessories, and whilst it is true that some engine types do suffer harmonic issues from lightweight pulleys, we steer clear of those. The kits we release are thoroughly application tested and do NOT cause engine damage in the short or long term.Fitments:VW Golf R Mk6 2.0TSI 08-13 When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Side.AUDI 8P (2003-2013) 2.0TFSIAUDI B7 (2005-2008) 2.0TFSIVW Golf GTI Mk5 2.0TFSI 04-09VW Jetta Mk5 2.0 FSI 05-11 When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Side.VW EOS 2.0 TFSI 2006-2015VW Jetta Mk5 2.0T 2005-2010AUDI TT 8J 2.0 TFSI (EA113) 06-10 When Installing A GFB Valve, It Must Be Installed In The OPPOSITE Orientation To The Factory Plastic Bosch Valve - I.E. Air Must Enter The GFB Valve At The Bottom, And Dump Through The Side.AUDI TTS 8J 2.0 TFSI 06-14AUDI S3 8P (2006-2013) 2.0TFSI