Standard Motor Products 55430 Spark Plug Wire Set. It is a leading manufacture of a full line of engine management related products, from fuel to ignition to exhaust and all electronics in-between. Standard is the leader in the automotive aftermarket. Backed by more than 100 years of experience, we design, engineer, manufacture and distribute over 50,000 of the highest quality engine management products in some of the most advanced-technology categories. Our ignition and fuel-system components, sensors, switches, computerized engine controls, and all of our other advanced engine systems parts all have one thing in common we won’t let them leave our facilities until they meet our strict quality standards. That’s how we know that they’ll meet your high standards.