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Dorman 42109 Extended Spark Plug Non-Fouler - Universal Fit, 2 Pack

Free shipping on orders over $29.99

$12.99

$ 5 .99 $5.99

In Stock
  • Direct replacement - this spark plug non fouler is designed for easy installation to protect spark plugs from fouling and damage on specified vehicles
  • Ideal solution - this non-fouler preserves spark plug life and is a reliable replacement for an original non-fouler that has failed due to corrosion
  • Durable construction - made from quality components to ensure reliable performance and a long service life
  • Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
  • Support available - every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team


This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. It is engineered for durability and reliable performance.


Arnob
Reviewed in the United States on February 4, 2025
I bought these Dorman 42109 Extended Spark Plug Non-Foulers to help keep my spark plugs cleaner, and they worked perfectly! The quality is solid, with durable metal construction that holds up well under heat and pressure. They fit universally as described and were easy to install.If you’re looking for a reliable solution to extend spark plug life and reduce fouling, these are a great choice. Highly recommend!
Mike
Reviewed in the United States on February 27, 2025
Was told to get these to make my daughter's poc Buick Encore to pass emissions. No bueno, prob not this tool's fault I was dumb enough to buy a garbage Buick. Still, cheaper than anyone else and fit well.
Princess G
Reviewed in the United States on February 25, 2025
Worked perfectly for application. Vehicle kept kicking codes cats were bad. Vehicle is driven long enough for cats to be efficient. Vehicle runs great, gets better fuel mileage now, and engine light is off. Passed inspection.
Sky S.
Reviewed in the United States on February 25, 2025
Just as describes. Functioned perfectly for what I was trying to do.
Ron Boogaard
Reviewed in the United States on February 22, 2025
Good product.
Grp Cpt Mandrake
Reviewed in the United States on February 19, 2025
Excellent product for the P430/P420 codes.Easy to install, nice crush washers to mount to exhaust.No drilling required, perfect product length.Use a little anti-seize when threading into exhaust.A very simple fix for what can be diagnosed as a major expense.
Mark P Foley
Reviewed in the United States on February 13, 2025
Used these for O2 sensors that kept alarming in our Honda Element. Drilled out bases to 1/2 inch. They work but now get occasional slow -to -read alarm. Perfect fit.
jon
Reviewed in the United States on December 31, 2024
No P0420 code after install and passed inspection. Extra depth gives the sensor plenty of room. Highly recommended
Ron
Reviewed in Canada on November 20, 2024
To be honest, I discovered it is illegal to use these devices, as I intended.Parts are excellent
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