Enhance the performance of your vehicle with this pack of 8 Autolite 646 spark plugs. These spark plugs are specifically designed to fit Town and Country Voyager Intrepid 3.3L V6 models. The 14mm thread diameter and 21mm hex size ensure a perfect fit, while the copper material guarantees maximum conductivity. These spark plugs are suitable for gasoline-fueled vehicles with a 12V voltage and standard configuration. The installation depth of .75in is perfect for a seamless installation. With interchange part numbers including R45NSX, R45XLS6, R44XLS6, SP-451, and OE/OEM part numbers 4864458 and 4686083, these spark plugs are a reliable choice for your vehicle.