GFB Evo 4-9 Under-Drive Crank Pulley w/ Belt

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 percent, so most of the torque that used to accelerate the pulley can now be applied to the wheels.This Part Fits: Year Make Model Submodel 2003-2006 Mitsubishi Lancer Evolution 2015 Mitsubishi Lancer Evolution Final Edition 2008,2010-2015 Mitsubishi Lancer Evolution GSR 2005-2006,2008,2010-2015 Mitsubishi Lancer Evolution MR 2010-2011 Mitsubishi Lancer Evolution MR Touring 2005-2006 Mitsubishi Lancer Evolution RS 2006,2010 Mitsubishi Lancer Evolution SE 2009-2015 Mitsubishi Lancer Ralliart 2010-2011 Mitsubishi Lancer Ralliart Sportback