Super lightweight 100% Duralumin Duralumin is alloy of aluminum (over 90%) with copper (about 4%), magnesium (0.5%-1%), and manganese (less than l%). Because of its lightness and other desirable physical properties, duralumin is widely used in the aircraft industry. material of both pulley part of an outer, and an inner plate portion to realize super-lightweight body.Extreme durability By coating with hard almite on the surface, durability of the pulley have raised dramatically. It can easily be used for the drag racing cars that exceed 1000 horse power and 10000RPM. Extreme high precision Tomei have succeeded in giving extreme high precision to the pulleys
shape & construction Gives precise & durable transfer of power from the crankshaft via the timing belt.