The super-light weight of this pulley provides a power boost and results is a more free-flowing throttle response and more efficient power production. This is an upgrade that most drivers can actually 'feel'.
Some believe that a lightweight crank pulley has an adverse effect on the balance of the engine. This is not the case with the Subaru boxer. The Subaru engine is already well balanced and the crankshaft is relatively short, therefore the crank pulley's balancing effect is minimal.
