Torque Solution Lightweight Crank Pulley Profisses do Passado e Presente PDF. Torque Solution Lightweight Crank Pulley Applications: Subaru Impreza 2012+ & BRZ Torque Solution has designed this crank pulley not only to improve performance but to surpass the quality of the original pulley. A critical feature of the Torque Solution pulley is its increased mounting surface area between the pulley and the crankshaft. The increased surface area distributes the contact load over a larger area, eliminating the chances of the pulley spinning loose. Torque Solution constructed this crank pulley from high quality CNC machined billet aluminum to provide lightweight without sacrificing strength. The black anodized finish seals the aluminum and preserves the appearance. Most important, this lightweight pulley improves throttle response and increases acceleration by putting more horsepower and torque to the wheels. 597 Grams (~3. 5lbs lighter than OEM) lightweight 6061 T6 billet aluminum Black anodized Limited Lifetime Warranty