Superchargers are bolt on power. Just make sure you choose the right type for your driving style. Twin screws are popular not only because of the way they look under the hood but also the instant boost when you nail the throttle. Centrifical designs are progressive and make a little more top end power. If you are a street cruiser and just need to get moving quickly then go with a Twin Screw. If you like to go for the long runs the the centrifical may be the way to go. Give us a call and we can help you decide which superchrger fits your goals.