The U-Groove Spark Plug features a patented U-groove ground electrode design that enhances ignitability, allowing for leaner fuel mixtures and improved engine efficiency. Crafted with precision machine-rolled threads, it minimizes the risk of seizing or cross-threading in delicate aluminum heads, ensuring a hassle-free installation. Built to last twice as long as most conventional plugs, this spark plug delivers exceptional durability and reliable performance for over 30,000 miles. Its nickel center electrode tip material ensures consistent spark delivery, while the flat seat type guarantees a secure fit. With a wide range of part numbers available, it is compatible with thousands of applications, including classic and collector cars. Each plug is 100 percent pre-fired to ensure dependable operation, making it a trusted choice for maintaining OE performance.

Product Features:

• Patented U-groove ground electrode design fires leaner mixtures than conventional plugs
• Precision machine-rolled threads reduce seizing and cross-threading in delicate aluminum heads
• Wide range of part numbers for thousands of applications, including classic and collector cars
• Lasts twice as long as most conventional plugs
• 100 percent pre-fired to assure reliable operation
• U-Groove Conventional