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ACDelco GM Original Equipment R42LTS Conventional Spark Plug

4.6 4.6 out of 5 stars 532 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Spark Plugs by ACDelco

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1 Count (Pack of 1)

Purchase options and add-ons

Brand ACDelco
Core Material Copper
Top Material Type Nickel

About this item

  • Black Onyx coating helps reduce corrosion
  • Copper core provides great heat transfer and helps maximize plug durability
  • Ribbed suppressor seal extends resistance and helps prevent spark 'flash over' and misfires
  • Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
  • Available for use in Marine applications
  • Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
  • ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

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$3.73
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$25.98
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ACDelco GM Original Equipment R42LTS Conventional Spark Plug
ACDelco GM Original Equipment R42LTS Conventional Spark Plug
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Price$3.73$25.23$13.68$3.49$26.07$34.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Value for money
4.3
4.8
3.6
4.4
Easy to install
5.0
4.8
4.6
Mileage
4.3
2.6
4.4
Sold By
Amazon.com
*PAMISPANAS*
KAX-AUTO Direct 2
Amazon.com
G.P.S.
TXN Supply
number of items
1
8
1
core material
Copper
Copper
Nickel
Copper
Copper
Copper
top material
Nickel
Nickel
Nickel
Alloy Steel
Nickel
Nickel

From the manufacturer

ACDelco Spark Plugs
Iridium Spark Plugs

Iridium Spark Plugs

Iridium Spark Plugs are engineered to offer excellent engine idling stability and a smooth performance.

  • Iridium offers excellent engine idle stability and smooth performance
  • One-piece suppressor seal blocks radio frequencies that can affect vehicle electronics
  • Suppressor seal meters spark energy for long electrode life and seal against combustion leakage

Platinum Spark Plugs

Platinum Spark Plugs

Platinum spark plugs are designed to deliver long-lasting performance and maximize durability.

  • One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal
  • Helps reduce radio frequency and engine interference, regulate spark plug energy and seal against compression pressures for long life
  • Double platinum point pad on center and ground electrode offers durability and consistent voltage demands to help reduce wear on ignition system
  • Pure copper core results in cooler electrode temperature for durability and superior fouling resistance

RAPIDFIRE Spark Plugs

RAPIDFIRE Spark Plugs

RAPIDFIRE spark plugs are made with ribless insulators to help optimize plug-to-boot seal.

  • Solid-state suppressor with two-piece glass and brass seal
  • Helps reduce radio frequency interference, regulate spark energy for long electrode life and protect against high combustion pressures
  • Pure copper core provides great heat transfer and helps maximize plug durability
  • Platinum on center electrode enables superior spark characteristics and helps reduce voltage requirements of the ignition system
  • Ribless insulator provides a great plug to boot seal

Conventional Spark Plugs

Conventional Spark Plugs

Designed with a high-quality copper core, these spark plugs help deliver reliable performance.

  • Black onyx coating helps prevent corrosion
  • Copper core provides great heat transfer and helps maximize plug durability
  • Ribbed suppressor seal extends resistance and helps prevent spark “flash over” and misfires
  • Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
  • Available for use in marine applications

ACDelco Spark Plug Infographic
At GM Genuine Parts and ACDelco, we strive to blend quality and expertise to keep you moving forward

Product Description

ACDelco GM Original Equipment Conventional Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional. ? WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

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Warranty & Support

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ACDelco GM Original Equipment R42LTS Conventional Spark Plug


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  • Spark Plug
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    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    532 global ratings

    Customers say

    Customers like the durability, value, quality and fit of the spark plugs. They mention that they work well, are good for the price and that the spacing preset was accurate.

    AI-generated from the text of customer reviews

    18 customers mention15 positive3 negative

    Customers like the durability of the spark plug. They say it works well, has no issues, and is reliable.

    "...in a 2004 PCM (Ford) 351W V8 inboard boat engine from May-Nov. Works beautifully and have not needed the spare I keep on board...." Read more

    "What can one say about spark plugs? They fit and they work great! I've used AC Delco plugs for years and have never been disappointed." Read more

    "No issues and worked as expected." Read more

    "The spark plugs working great in my 2004 Ford Taurus." Read more

    18 customers mention16 positive2 negative

    Customers like the value of the spark plug. They say it's good for the price, great plugs for the money, and saves a pretty penny.

    "These were the right ones for my car and the price was great" Read more

    "...I know I know ac Delhi is Chevy but they where cheap enough. Between the plugs and wire I tuned my daughter truck up for 20 bucks...." Read more

    "...Cannot complain about the price. I did the installation myself. Saved a pretty penny. Thanks for the speedy delivery, also!" Read more

    "Very good price, and fast delivery." Read more

    14 customers mention13 positive1 negative

    Customers are satisfied with the quality of the spark plugs. They mention that they are of good quality, seem like factory plugs, and are of a great brand. Some say that the plugs fire nicely and that the engine runs much better now.

    "Good spark plugs for normal opperations , for performance on fast acceleration response from 1 thru 10 I give them a 7 but good spark plugs no doubt." Read more

    "Very good quality spark plugs for the price.i couldn't believe they were so cheap...I installed these on my 2005 Ford focus and the engine runs much..." Read more

    "Like ac delco price was good quality seem like factory plugs" Read more

    "Fired right up with no problems. Just make sure to set gap. Had one closed gap from shipment." Read more

    6 customers mention6 positive0 negative

    Customers are satisfied with the fit of the spark plug. They mention that the spacing preset was accurate and the sparkplugs fit with the wires without having to be too.

    "The spacing preset was accurate and the spark plugs fit with the wires without having to be too forced." Read more

    "What can one say about spark plugs? They fit and they work great! I've used AC Delco plugs for years and have never been disappointed." Read more

    "Fit as specified, great price fast delivery" Read more

    "Perfect fit." Read more

    Good quality
    5 Stars
    Good quality
    Very good quality spark plugs for the price.i couldn't believe they were so cheap...I installed these on my 2005 Ford focus and the engine runs much better now.
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    Top reviews from the United States

    Reviewed in the United States on November 18, 2023
    Size: 1 Count (Pack of 1)Verified Purchase
    Reviewed in the United States on May 30, 2023
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    Reviewed in the United States on May 19, 2023
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    Reviewed in the United States on March 1, 2018
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    Reviewed in the United States on November 8, 2020
    Size: 1 Count (Pack of 1)Verified Purchase
    One person found this helpful
    Report
    Reviewed in the United States on March 25, 2022
    Size: 1 Count (Pack of 1)Verified Purchase
    2 people found this helpful
    Report
    Reviewed in the United States on September 20, 2019
    Size: 1 Count (Pack of 1)Verified Purchase
    Reviewed in the United States on July 10, 2018
    Size: 1 Count (Pack of 1)Verified Purchase