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Description:
The ACDelco Gold 41-629 Copper Spark Plug is designed to deliver dependable ignition performance and efficient engine operation. Built with a copper core center electrode, this spark plug promotes excellent heat transfer while helping maintain durability and consistent combustion across a wide range of driving conditions.
A ribbed suppressor seal helps extend resistance and prevent spark flashover and misfires, while nickel-chrome alloy sheathing protects the center electrode from corrosion. The plug also features a Black Onyx coating to help reduce corrosion and extend service life in demanding environments.
Designed to meet expectations for fit, form, and function, the ACDelco Gold 41-629 spark plug is a high-quality replacement option suitable for many automotive and marine applications.
Features:
Copper core center electrode for excellent heat transfer and durability
Black Onyx coating helps reduce corrosion
Ribbed suppressor seal helps prevent spark flashover and misfires
Nickel-chrome alloy sheathing protects center electrode from corrosion
Designed for reliable ignition performance and efficient engine operation
Suitable for automotive and marine applications
Product Specifications:
Part number: 41-629
Product line: ACDelco Gold
Center electrode core material: Copper
Center electrode tip material: Nickel alloy
Ground electrode tip material: Nickel
Ground electrode quantity: 1
Ground electrode design: Standard
Center electrode design: Standard
Thread diameter: 14 mm
Reach: 0.75 in
Seat type: Flat
Washer type: Crush washer
Washer included: Yes
Hex size: 15.88 mm (16 mm nominal)
Resistor type: Yes
Pre-gap size: 0.89 mm
Manufacturer heat range: 4
Insulator material: ES703
Insulator height: 2.01 in
Electrical terminal type: Non-removable nut
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.
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).
