The Autolite HT15 Platinum High Thread Spark Plug features a unique patented OE design that results in more durability and greater power from a more compressive seal improved heat transfer and more focused ignition power. Since its inception the Autolite brand has provided the automotive aftermarket and original equipment manufacturers with the highest quality ignition products. Autolite has been in operation for over 100 years and has produced more than 11 billion spark plugs and glow plugs. These plugs are specifically designed for each application to meet or exceed OE quality and performance. Autolite makes plugs for American Japanese European and Korean cars as well as plugs for lawn and garden and power sports. As a leading supplier of spark plugs the Autolite brand has the right ignition products for your application regardless of make or model import or domestic.