Belden® EDGE

With a long history of design innovation, NAPA® Echlin’s product expertise and manufacturing capabilities are vital assets in making Belden® EDGE the most trusted name in spark plug wires. NAPA Belden EDGE Premium Spark Plug Wires are the first step in the Ultimate Tune-Up. Covered by four U.S. patents, they will change a vehicle's performance right from the start.

"Easy installs just got easier straight out of the box."

See the Belden® Advantage

For more than 90 years, NAPA® Echlin® has excelled as a producer of engine management, wire and cable, and temperature control replacement parts. Echlin’s wire and cable division, NAPA® Belden®, recently added even more value to its already industry-leading wire set offering. You will find those enhanced features and benefits in the NAPA® Belden® EDGE Premium spark plug wire line. With a long history of design innovation, Echlin’s product expertise and manufacturing capabilities are vital assets in making Belden® the most trusted name in spark plug wires. Save time and have peace of mind knowing that the easy-to-install NAPA® Belden® EDGE line meets and quite often exceeds OE requirements.

Numbered leads for easy installation

Factory-installed wire clips and routing trays keep spark plug wires sorted and spaced, preventing melted casings and electrical arcs and allowing for quicker installation

Factory-installed protective loom* prevents melted casings and electrical arcs

Belden's Formula 46 wire casing offers superior heat protection to stop melting and corrosion before they start

Patented Wire engineered to offer low resistance and high inductance - meaning higher voltage and more power transferred faster and with more strength - resulting in improved power, efficiency, and performance

OE-matched spark plug and distributor boots provide correct fit, resist fuel and oil contamination, and offer tight, moisture-proof seal

A Closer Look at Belden® EDGE Wires

NAPA® Belden® EDGE Premium Spark Plug Wires come ready for installation straight out of the box. Plus, they feature several upgraded components to ensure premium quality. Here’s a closer look at three such components and why the components matter:

Formula 46 Wire

Formula 46 is a specially developed wire casing that offers superior heat protection. Featuring a durable silicone base and chemical compound that’s permanently bonded through grafting, the patented protective coating creates an impenetrable shield that battles extreme heat and cold. On the inside, our unique inner core offers ultra-low resistance and higher voltage, which maximizes the flow of energy from ignition to the spark plug for smoother starts, better performance, and more power.

EDGE Design

Our innovative EDGE design includes factory-installed wire clips, trays, and a protective loom to keep spark plug wires properly sorted, spaced, and positioned, preventing melted casings and wire arcing. These enhancements are at the heart of our timesaving EZ-Fit design for a quick and perfect installation every time. NAPA® Belden® EDGE delivers more to your customers and to your bottom line.

Spark Plug & Distributor Boots

Superior material and boot construction means NAPA® Belden® EDGE will match or quite often exceed the original specifications for fit, form and function. Our engineers took it one step further with an improved seal that keeps moisture out and energy in, and flowing.

Belden Edge: Time Savings


NAPA® Belden® Edge Premium Spark Plug Wires come ready for installation straight out of the box. New enhancement upgrades like factory installed wire clips, trays and protective loom keep wires sorted individually for quicker, easier installation, while giving improved performance and protection. Our NAPA® Belden® Edge line is built to save time and money with our EZ-Fit design and "Wired for Life" guarantee.

NAPA® Belden® Edge Premium Spark Plug Wires provide a real Edge with features not seen in competitive sets while offering complete coverage for import and domestic vehicles. 

We're a Basic Manufacturer

NAPA® Belden® EDGE is a basic manufacturer of premium spark plug wire sets, with three locations in North America. Our highly automated bulk wire facility employs a comprehensive production process that includes everything from custom silicone compounding to continuous vulcanization outer jacketing. In fact, we even mold our own wire boots which has allowed our engineers to make improvements to many original equipment design flaws.

We're Vertically Integrated, too

Vertical integration assures that NAPA® Belden® EDGE product quality, with reduced production costs, is maintained in each step of our process. Working seamlessly with our assembly plant and distribution center, NAPA® Belden® EDGE maintains complete quality control from raw material through packaging, so it’s no surprise that we were one of the first wire and cable companies to achieve ISO/TS16949:2002 certification. The result is that NAPA® Belden® EDGE customers receive Belden® innovation, quality and value in every NAPA® Belden® EDGE wire set they purchase and install.