From lawn mowers to chain saws the Autolite XST3924 Xtreme Start Iridium Spark Plug provides quicker consistent starts versus the average plug and an anti-foul design. The .6 millimeter iridium-enhanced fine-wire design offers exceptional fouling resistance providing reliable starting in any season or weather condition. Iridium Xtreme Start plugs have up to 26 percent quicker engine starts than leading standard plugs for less battery and starter wear as well as less pull-cord effort required. They also have up to 21 percent less HC emissions than a standard plug for better fuel efficiency and horsepower. Since its inception the Autolite brand has provided the automotive aftermarket and Original Equipment manufacturers 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 & 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.