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Champion 123 Copper Plus Spark Plug RN5C

Manufacturer

Champion

<h3>Champion: A Legacy of Engine Performance</h3><p>For decades, <strong>Champion</strong> has been one of the most trusted names in engine ignition and maintenance. Born from a commitment to precision engineering, Champion has earned its reputation by delivering reliable, time-tested replacement parts that keep engines running at their best — whether on the road, on the water, or in the backyard.</p><h3>World-Class Spark Plug Technology</h3><p>Champion's story is inseparable from the spark plug. The brand helped pioneer modern ignition technology, and today its spark plug lineup remains a go-to choice for automotive technicians and DIY mechanics alike. Champion <a href="/120-champion-spark-plug-7212">spark plugs</a> are engineered to deliver consistent ignition performance across a wide range of engine types, from daily-driver commuter cars to high-demand power sport machines. Whether you're tuning up a classic V8 or maintaining a small-displacement four-cylinder, Champion offers a plug designed to match your engine's specific requirements.</p><p>Beyond the plug itself, a reliable ignition system depends on every component working in harmony. Champion's <a href="/120-champion-spark-plugs-spark-plug-boot-kit-23507">spark plug boot kits</a> provide the complete solution — protecting ignition wires and ensuring a secure, interference-free connection between the plug and the ignition system. These kits are especially popular for vehicle owners who want a thorough tune-up rather than a partial fix.</p><h3>Marine and 2-Cycle Engine Solutions</h3><p>Champion's expertise doesn't stop at automotive ignition. The brand also serves boaters and marine enthusiasts with products formulated for the unique demands of water-based engines. Champion <a href="/120-champion-2-cycle-outboard-oil-200042">2-cycle outboard oil</a> is designed to protect outboard motors running in demanding marine conditions, helping to minimize wear, reduce deposits, and extend engine life. It's a natural extension of Champion's core philosophy: give every engine — regardless of application — the quality it deserves.</p><h3>Built for Every Engine, Every Application</h3><p>What sets Champion apart is the breadth of its coverage. From passenger vehicles to boats, lawn and garden equipment to power sport machines, Champion engineers products with real-world performance in mind. The brand's catalog of over 800 products means that regardless of what you drive, ride, or operate, there's a Champion part designed to keep it running at peak efficiency.</p><p>Whether you're doing a routine tune-up or a full ignition system overhaul, Champion's combination of heritage, innovation, and comprehensive coverage makes it a brand worth turning to first.</p>

Part Number

123
05/31/2036 11:42 PM
Sale Price

$3.86

In Stock (10+)

delivery box

Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Champion 123 Copper Plus Spark Plug delivers reliable ignition performance for a wide range of small engines and outdoor power equipment. Featuring a solid copper core electrode, this spark plug provides excellent heat dissipation and conductivity for consistent starts and smooth operation.

Key Features:

  • Copper core electrode for superior heat control and conductivity
  • RN5C heat range designation for specific engine applications
  • Proven Champion design for dependable performance
  • Corrosion-resistant shell for extended service life
  • Standard resistor type for reduced radio frequency interference

Champion Copper Plus spark plugs are engineered to meet or exceed OEM specifications, making them an ideal choice for routine maintenance and replacement. Sold in standard pack quantities only.

Products specifications

Electrode Core Material

Copper

Electrode Tip Material

Copper

Ground Strap Quantity

One

Insulator Type

Projected

Quantity

Sold individually.

Shorty Spark Plug

No

Spark Plug Reach

0.750 in.

Spark Plug Seat Style

Gasket

Spark Plug Thread Size

14mm

Wrench Diameter

18mm

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