 | Perrin's 4-Pound Aluminium crank pulley for the 03-06 Evolution is not an underdriven pulley, so it will not affect the performance of your other belt-driven accessories. It is an exact copy of the OEM crank pulley, only lighter, so the design will reduce rotating mass directly at the source, freeing up power and reducing parasitic drivetrain loss. This unique design will not lead to bearing failure, vibration, and premature accessory wear as commonly associated with other underdrive pulley kits. This pulley comes complete with detailed instructions for an easy install.
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