Engine-driven accessories are like parasites that sap power from your engine. The catch-22, of course, is that many of these accessories are required for your engine to run properly. If you're looking to gain more power by any means necessary, there's a solution. By slowing down these accessories, they can be under-driven, reducing power loss. These Turner Motorsport Race Power Pullies are made from hard-anodized T-6061 aluminum and reduce rotation from between 10% to 20%. The result is a maximum gain of up to 11 horsepower. In this kit, the water pump, power steering pump, and alternator pullies are replaced ( a shorter belt is included). This kit comes with a race-spec alternator pulley, which results in the alternator being significantly underdriven. As a result, this Turner Race Power Pulley kit is recommended for off road use or track use only.