Increase your engine's efficiency with the N52 Underdrive Pulley. The 170mm diameter power steering pulley reduces parasitic drag by 35%, giving you more power to use where it matters - the wheels. Designed for n52 e9x cars and replaces OEM part number 32427537862. Upgrade to maximize performance.
Works with existing belt size, but check for tensioner being maxed out incase other factors exist. Use our belt 1268mm for ac compressor delete & double tensioner pulley routing.
