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Champion Copper Plus Spark Plug 404
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Champion Copper Plus Spark Plug 404

CHAMPION
ELE1972
In stock
$5.34 $4.99
Description The Champion Copper Plus Spark Plug 404 is engineered to deliver dependable ignition performance and...
$4.99
Champion Copper Plus Spark Plug 404
Description

Description

The Champion Copper Plus Spark Plug 404 is engineered to deliver dependable ignition performance and long service life in a wide range of automotive applications. Featuring a copper core center electrode, this spark plug provides increased conductivity and precise heat control to support consistent combustion and good overall wear.

As part of the Champion Copper Plus line, the RN12YC is built for reliable replacement performance with superior corrosion resistance and construction designed to meet ISO and SAE standards. The copper core center electrode helps maintain accurate heat range control for longer plug life and dependable engine operation.

With a flat seat, crush washer, resistor design, and factory pre-gap of 0.035 in (0.89 mm), this spark plug is a durable replacement option for classic, vintage, and standard engine applications across a wide range of makes and models.

Features

  • Copper core center electrode improves conductivity and heat control

  • Built to ISO and SAE standards for proven performance

  • Champion Copper Plus design for dependable performance and durability

  • Superior corrosion resistance for extended service life

  • Accurate heat range control supports longer plug life

  • Resistor design helps maintain reliable ignition performance

Specifications

  • Brand: Champion

  • Part Number: 404

  • Plug Type: RN12YC

  • Classification: Champion Copper Plus

  • Grade Type: Standard Replacement

  • Part Description: Spark Plug

  • Center Electrode Tip Material: Copper

  • Center Electrode Design: Standard

  • Center Electrode Diameter: 0.10 in

  • Ground Electrode Quantity: 1

  • Ground Electrode Core Material: Nickel

  • Ground Electrode Tip Material: Nickel

  • Ground Electrode Material: Nickel Copper Alloy

  • Pre-Gap Size: 0.035 in / 0.89 mm

  • Hex Size: 0.813 in / 20.650 mm

  • Insulator Height: 0.12 in

  • Manufacturer Heat Range: 12

  • Seat Type: Flat

  • Reach: 0.75 in

  • Thread Diameter: 0.551 in / 14.000 mm

  • Resistor Type: Yes

  • Washer Included: Yes

  • Washer Type: Crush

  • Electrical Terminal Type: Non-Removable Nut

  • Hex Type: Hex

  • Indexed: No

  • Installed Height: 2.24 in

  • Insulator Projection: 0.12 in

  • Taper Diameter: 0.25 in

  • Subject to Prop 65: No

Fitment

  • Fits a wide range of AC, American Motors, Aston Martin, Audi, Austin, Austin Healey, BMW, Bentley, Buick, Chevrolet, Chrysler, Dodge, Fargo, Ford, GMC, Geo, Isuzu, Jaguar, Jeep, Land Rover, Mazda, Mercedes-Benz, MG, Morgan, Nissan, Plymouth, Pontiac, Porsche, Renault, Rolls-Royce, Saab, Studebaker, Suzuki, Toyota, Triumph, Utilimaster, and Volkswagen applications.

  • Common uses include select classic cars, vintage trucks, inline 6 engines, V8 applications, and standard replacement automotive engines.

  • Preserve the full application table from the original source for exact year, make, model, engine, and quantity requirements.

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Shipping

Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.

Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.

Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.

Returns

Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.

Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.

Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.

Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).

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