This pack of four DENSO 3129 spark plugs is a great choice for any gasoline engine. With a thread diameter of 14 mm and standard configuration, these spark plugs are designed for easy installation and optimal performance. The OE/OEM part number Q16R-U ensures compatibility with your vehicle, while the voltage of 12V and manufacturer part number 3129 guarantee the quality of the product. Made in Japan and compatible with all vintage and modern gasoline engines, these spark plugs are a must-have for any car or truck owner. The pack includes four spark plugs, each with a unique design and configuration, making it an ideal choice for those who want to upgrade their ignition system. Buy now and experience the benefits of high-quality spark plugs!