The Elite series offers the highest possible amperage and durability available in a large case alternator. 6 phase technology combined with massive twin rectifier assemblies and 12 diodes makes these alternators totally durable for daily use. while still maintaining great output. This unit will achieve 180 amps at engine idle speeds and a full 250 amps at vehicle cruising speeds. This unit comes with a standard diameter pulley. making it perfect for high RPM and racing use.