Gift CardContactAbout
0 My Cart

Your cart is currently empty.

Continue shopping
Total: $0.00
View cart
Toggle menu
0
  • Home
  • Autolite Copper Spark Plug – 403
-16%
Autolite Copper Spark Plug – 403
Autolite Copper Spark Plug – 403
Load image into Gallery viewer, Autolite Copper Spark Plug – 403
Load image into Gallery viewer, Autolite Copper Spark Plug – 403

Have Questions?

(425) 295-1665 Ask an Experts

  • Trusted by Racers

    Professional-grade parts used trackside.

  • Real Support, Real People

    Expert help during business hours.

  • Secure Shopping

    Encrypted checkout & trusted payments.

  • Fast U.S. Shipping

    Orders ship quickly from regional warehouses.

Autolite Copper Spark Plug – 403

AUTOLITE
ELE1888
In stock
$5.95 $4.99
Description:The Autolite 403 Copper Spark Plug is designed to deliver reliable ignition performance, quick starts, and...
$4.99
Autolite Copper Spark Plug – 403
Description

Description:
The Autolite 403 Copper Spark Plug is designed to deliver reliable ignition performance, quick starts, and consistent engine power. Its copper core center electrode provides excellent heat transfer, helping maintain proper operating temperatures and improving resistance to fouling.

High nickel alloy center and ground electrodes provide extended durability and stable spark delivery. The multi-rib high alumina ceramic insulator enhances electrical insulation and heat dissipation, helping ensure dependable performance under demanding engine conditions. A nickel-plated shell helps resist corrosion and protects the spark plug from rust and wear over time.

Autolite copper spark plugs are engineered as dependable replacements for many gasoline engines, helping maintain smooth engine operation and efficient combustion.

Features:

  • Copper core center electrode improves heat transfer and fouling resistance

  • High nickel alloy center and ground electrodes extend spark plug life

  • Multi-rib ceramic insulator improves electrical insulation and durability

  • Nickel-plated shell helps resist corrosion and improve longevity

  • Designed for quick starts and consistent ignition performance

Product Specifications:

  • Part number: 403

  • Brand: Autolite

  • Product type: Copper spark plug

  • Center electrode core material: Copper

  • Center electrode tip material: Nickel

  • Ground electrode core material: Nickel

  • Ground electrode tip material: Nickel

  • Ground electrode configuration: Single

  • Ground electrode quantity: 1

  • Thread diameter: 14 mm

  • Thread size: M14 × 1.25

  • Seat type: Flat

  • Washer type: Flat washer

  • Washer included: Yes

  • Reach: 0.75 in

  • Hex size: 13/16 in

  • Resistor type: Yes

  • Resistance: 5000 ohms

  • Pre-gap size: 0.9 mm

  • Manufacturer heat range: 11

  • Insulator material: Ceramic

  • Center electrode design: Standard

  • Center electrode projection: Short projection

  • Center electrode insulator tip projection: 0.039 in

  • Electrical terminal type: Removable nut

  • Skirt: Yes

Read More
Read Less

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).

Your cart

×