You would only need a 10 amp voltage reducer for any of our headlight and tail light kits. It is our part number VR10.  Click Here to view the VR10

If you plan on adding a radio or other accessories our 25 Amp is recommended which is part number VR25.  Click here to view the VR25

Our largest size is a 30 amp and can run the most accessories, it is our part number VR30.  Click here to view the VR30