Upgrade your motorcycle's performance with this brand new set of 4 Autolite copper core spark plugs. These high-quality plugs are specifically designed for front placement on a variety of vehicles, including motorcycles and scooters. With a manufacturer part number of 3924, these spark plugs are a perfect fit for your ride. The spark plugs are made in the United States and come with no warranty from the manufacturer. They are not a custom bundle and have not been modified. Improve the electrical and ignition components of your vehicle with these Autolite spark plugs.