Get your engine running smoothly with this pack of 4 Autolite Spark Plugs, model number 3923. These high-quality spark plugs are specifically designed for use in vehicles and provide reliable ignition and performance. With Autolite's reputation for excellence, you can trust that these spark plugs will exceed your expectations. The 3923 model is compatible with a variety of vehicle types and is sure to provide a long-lasting solution to your ignition needs. Whether you're a professional mechanic or a DIY enthusiast, these Autolite Spark Plugs are a great choice for your next engine tune-up.