Copper Plus™ Spark Plug — 14 mm thread, 11.1 mm reach (7/16"), 17.5 mm hex (11/16"), heat range 8

CHAMPION Copper Plus™ Spark Plug — 14 mm thread, 11.1 mm reach (7/16"), 17.5 mm hex (11/16"), heat range 8 – 58-78 Sportster

CHAMPION
RH8C
CCH538
Copper Plus™ spark plug with copper-core electrode, SAC-9 resistor and Ultraseal™ coated shell; made in the USA.
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€2.80
€5.93
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Quantity

  Delivery policy

In stock items will be shipped within 1-3 days.

  Return policy

You can return the products within 14 days for a full refund, check our returns policy.

The Copper Plus™ spark plug pairs a copper-core center electrode with modern resistor technology to deliver reliable ignition, improved heat control, and extended service life. ⚡️🔧

  • Copper-core center electrode for accurate heat range control and optimized performance.
  • Patented SAC-9 semiconductor resistor for maximum EMI and RFI suppression, delivering stable ignition.
  • Patented Ultraseal™ coated shell to prevent rust and corrosion for longer durability.
  • Made in the USA.

Ideal for engines that require consistent spark timing and dependable operation between services.

: RH8C
In Stock

Data sheet

Type
Resistor
Units
Each
Style
Copper Plus
Brand
CHAMPION
Thread Size
14 mm
Center Electrode Type
Standard
Electrode Tip Material
Nickel Alloy
Ground Electrode Shape
Standard
Ground Electrode Configuration
Single
Heat Range
8
Terminal Configuration
Removable Nut
Center Electrode Projection
Non-Projected
Hex Size
17.5 mm (11/16")
Thread Reach
11.1 mm (7/16")

Shipping Policy

Shipping Areas:

We ship to:

  • Spain (Peninsula and Balearic Islands)
  • European Union countries

We do not ship to the Canary Islands, Ceuta, or Melilla.

Shipping Times:

  • Spain (Peninsula): 2–4 business days
  • Balearic Islands: 3–5 business days
  • EU countries: 3–7 business days depending on destination

Shipping Costs:

Shipping costs are calculated automatically at checkout based on destination and weight.

Free shipping may be offered for qualifying orders, as specified on our website.

Order Processing:

Orders are processed within 1–2 business days after payment confirmation. Orders placed on weekends or public holidays are processed the next business day.

Delivery Issues:

If your order is delayed or arrives damaged, you must notify us within 14 calendar days. We will investigate the issue and offer a resolution in accordance with applicable consumer protection laws.

Return & Withdrawal Policy

Right of Withdrawal:

In accordance with Royal Legislative Decree 1/2007 (Ley de Defensa de los Consumidores y Usuarios), you have the right to withdraw from your purchase within 14 calendar days from the date of receipt, without giving any reason.

To exercise this right, contact us via email or through our website, providing your order number and contact details.

Return Conditions:

  • Products must be unused, in original condition and packaging.
  • Return shipping costs are the responsibility of the customer, unless the product is defective or sent in error.
  • Refunds will be issued within 14 days of receiving the returned goods.

Items Excluded from Return:

  • Custom or personalized products
  • Sealed items that were unsealed after delivery and are unsuitable for return due to hygiene (e.g. cosmetics, personal care)
  • Digital content delivered electronically once download or streaming has begun

If you want to return an item, please contact us first to give you detailed instructions.

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Sportster Sportster 1972
Harley Davidson Sportster Sportster 1973
Harley Davidson Sportster Sportster 1974
Harley Davidson Sportster Sportster 1975
Harley Davidson Sportster Sportster 1976
Harley Davidson Sportster Sportster 1977
Harley Davidson Sportster Sportster 1978
Harley Davidson Sportster Sportster 1958
Harley Davidson Sportster Sportster 1959
Harley Davidson Sportster Sportster 1960
Harley Davidson Sportster Sportster 1961
Harley Davidson Sportster Sportster 1962
Harley Davidson Sportster Sportster 1963
Harley Davidson Sportster Sportster 1964
Harley Davidson Sportster Sportster 1965
Harley Davidson Sportster Sportster 1966
Harley Davidson Sportster Sportster 1967
Harley Davidson Sportster Sportster 1968
Harley Davidson Sportster Sportster 1969
Harley Davidson Sportster Sportster 1970
Harley Davidson Sportster Sportster 1971
Harley Davidson Sportster Sportster 1972
Harley Davidson Cafe Racer Sportster 1977
Harley Davidson Cafe Racer Sportster 1978
Harley Davidson Sportster Sportster 1972
Harley Davidson Sportster Sportster 1973
Harley Davidson Sportster Sportster 1974
Harley Davidson Sportster Sportster 1975
Harley Davidson Sportster Sportster 1976
Harley Davidson Sportster Sportster 1977
Harley Davidson Sportster Sportster 1978
Harley Davidson Sportster Sportster 1958
Harley Davidson Sportster Sportster 1959
Harley Davidson Sportster Sportster 1960
Harley Davidson Sportster Sportster 1961
Harley Davidson Sportster Sportster 1962
Harley Davidson Sportster Sportster 1963
Harley Davidson Sportster Sportster 1964
Harley Davidson Sportster Sportster 1965
Harley Davidson Sportster Sportster 1966
Harley Davidson Sportster Sportster 1967
Harley Davidson Sportster Sportster 1968
Harley Davidson Sportster Sportster 1969
Harley Davidson Sportster Sportster 1970
Harley Davidson Sportster Sportster 1971
Harley Davidson Sportster Sportster 1977
Harley Davidson Sportster Sportster 1978