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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 their kits are underdriven, which means the accessories are driven slightly slower to reduce parasitic losses.
Features Improved throttle response and acceleration through significant reduction of rotating mass Engine feels more free-revving Under-driven kits offer more power through reduction of parasitic losses from the accessories with NO adverse affects on their operation Fitment 2006-2012 Audi A3 2008-2009 Audi TT 2009-2012 Audi TT Quattro S 2008-2012 Volkswagen GTI 2012 Volkswagen Golf R 2006-2010 Volkswagen Jetta/li>
