Autolite AR3931 Autolite AR3931 High Performance Racing Non-Resistor Spark Plug

Autolite Racing® Hi-Performance Spark Plugs are the ultimate racing plug designed for performance and used by professional car drivers. Autolite® spark plugs are the best alternative to OE spark plugs, offering OE form, fit and function for all makes and models, both foreign and domestic, at a value price. Autolite provides the automotive aftermarket and original equipment manufacturers with the highest quality ignition products and is the leading supplier of spark plugs.