Lightweight AND Underdrive Billet Aluminum 1.8T/2.0 Power Steering Pulley A lightweight billet aluminum version of the OEM power steering pulley, sized to allow a 10% reduction in power steering pump rotational speed without affecting other accesories. This pulley will reduce the parasitic losses from the power steering pump at higher rpms by preventing pump over-rotation. For those seeking an underdrive set up, this is the pulley to get! This pulley fits all MK4 Golf, Jetta, GLI, New Beetle, and 337 1.8T and 2.0 engines, as well as all Audi TT MK1 1.8T 180hp and 225 hp.