Based on the latest generation of Denso units these alternators from WOSP offer the best power output / weight ratio of any available alternator. The special windings provide super efficient charging which means that these alternators provide higher charging rates at lower RPM compared to conventional versions. In fact they provide up to 80% of their maximum output at engine idle speeds which is ideal for competition cars with high draw electric items such as electronic power steering, heated screens or large cooling fans, all which will operate at low engine speeds.WOSP 300 series race alternators are ideal for road or competition cars and are available in a range of universal fitments with Amp outputs from 95A to a staggering 390A. Pulleys are not included but are available separately. See the application table below for options OPTION AMPS HAND LUGS WEIGHT CONNECTIONS OPTION 1 95 180° 2 3.9kg B+ / Lamp OPTION 2 175 180° 2 3.9kg B+