A. K.—June 13, 2025✓ Verified purchase
My 2004 Titan started to develop a mis-fire yesterday. The last time I had this problem I took it to the dealer who said it was the plugs. I pulled the old plugs and they still looked new (NGK platinum). I got these delivered overnight and installed these new plugs. The truck fired up easily and with a smooth idle and no mis-fire. These saved me a trip to the dealer and probably a decent bill. The back plugs are a little difficult to get at but doable. All plugs were at the proper gap. Read more
CS—February 2, 2026✓ Verified purchase
Weren’t counterfeit so that was a big plus Read more
cvallenilla—January 29, 2026✓ Verified purchase
I have been using these NGK (4469) LFR5AIX-11 Iridium IX spark plugs (pack of 8) for several months now, and they are still performing excellently. From the moment I installed them, I noticed smooth engine operation, reliable starts, and overall improved performance. Even after months of regular use, they continue to deliver consistent ignition and great efficiency with no issues at all. The build quality is outstanding, as expected from NGK, and they hold up very well over time. I am very satisfied with this purchase and would definitely recommend these spark plugs to anyone looking for long-lasting reliability and excellent performance. Read more
Violett Michelle—June 23, 2025✓ Verified purchase
Installed these yesterday on my 2014 V8 5.7 Dodge Challenger, so far they're working great and doing their job. Running smooth and no misfiring. Reasonable price imo. Read more
Jackie—July 25, 2025✓ Verified purchase
A positive review for spark plugs typically highlights their performance, reliability, and efficiency. Here’s an example of what such a review might include: --- **Positive Review of Spark Plugs** "I recently replaced the spark plugs, and I couldn't be happier with the results! The installation was straightforward, and I noticed an immediate improvement in engine performance. The engine runs smoother, and stopped misfiring Read more
Amazonian—September 29, 2020✓ Verified purchase
They spark, pistons go “boom” and the engine continues to work. My stock plugs I ran to 83K miles. The problem was, to change them on a Hemi, it took about 4 hours to do them all. 16 different plugs. It was tough. With good gas, and smooth acceleration... my truck was rated 17 city 21 highway. Yet... I’m getting 23 highway. 😉 Read more
Big Daddy K—September 5, 2025✓ Verified purchase
Great plugs. Went right in as expected. Truck runs great. Read more
Paul Gardner—January 21, 2026✓ Verified purchase
Better quality than I expected. Read more
