RPM (Random Precision Manufacturing) introduces a new alternator for the Polaris RZR. This alternator is a must for the Polaris RZR! Now your stator and your battery can keep up with your stereo and HID lights! RPMFAB.com built this alternator kit just for you! The RZR kit uses a 45 amp alt. driven off of the crank shaft with a cog belt and pulleys. This is a completely bolt-on kit. The only cutting required is plastic parts. A total one-wire system- no switches or complicated wiring involved! Recommended to use an Optima battery with this kit.