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Lightweight crank pulleys have proven horsepower and torque increases on your Subaru WRX and STI. You can get pulleys under driven or same size as stock. We at Agency Power choose to make all of our crank pulleys the same diameter as the factory but reduce the weight. This type of design will not affect alternator power for the enthusiast running extra stereo equipment. This retains the factory belts and fits with no modifications.
Agency Power Crank Pulleys are CNC machined 6061 aluminum. Properly broached and includes the timing mark for a balanced OEM quality fit. The pulleys are then media blasted for a satin inish and lasered with the Agency Power name. Our Agency Power pulley weighs about 3.5lbs lighter then the factory pulley.
Overall driving impression is an increase in throttle response during acceleration. The entire power band gains performance and drivability remains the same.
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