Match your camshaft with Speedmaster™ iron distributor gears. Our iron distributor gears are the perfect mates for your cast iron cams. They are manufactured from top-quality cast iron, and then nitrided for durability. We also have bronze distributor gears, recommended for steel billet mechanical roller tappet cams and slot hard-faced steel billet mechanical flat tappet cams. The gears are precision-machined from the highest quality aluminum silicon bronze alloy for maximum durability.