NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW | Replaces SP526 CYFS12YP 4714 4719 5339 ITV20 IT20TT ITV20TT IVT20TT 6728 9617 HR7MPP30X 3017 XP5263 XP5363 XP5863.

Half price of same item at AutoZone/Advanced Auto/Napa, Napa said they would price match, but showed up and they were closed early due to computer issues. Saw a lot of reviews about cracked porcelain, I inspected mine, and we're fine. They do send you a 4 pack and 2 individuals taped to 4 pack. I am suspect of all those porcelain breaks and thinking more operator error than product defect. I installed in 2017 GMC Acadia Limited with 127k on OG plugs, runs great! Little more challenging than most other plug swaps, but got it done!

The spark plugs came as a 4 pack plus 2 in separate boxes. All genuine. They were used in my Ford Flex with the naturally aspirated 3.5L V6. Keep in mind that the naturally aspirated and twin turbo versions of this Ford engine have different spark plug gap requirements. The naturally aspirated engine has a larger gap than the turbo version. Unfortunately I do not remember if the gap brand new out of the box was set for naturally aspirated or turbo equipped engines.

Great fit

Well worth the money !! I have 2017 Ford Mustang and I've other brands of spark plugs in the past that have performed well but no where near as good as NGK. They came in pre-gapped which just makes life easier. I read other reviews about NGK sparks and based upon the responses I gave them a shot and glad I did. I noticed almost instantly the pick up in horsepower and performance. They're legit and I'm highly satisfied with their performance so far. I've had them in for the past 2 months and no changes in performance so far.

Easy to install,fit my 3.6L perfectly,!

Great plugs, had to reset the gap on these,they were set for .032 and I needed .049-.052. No big deal I always check plug gap. Will say the who ever owned my vehicle before went cheap and installed Platinum plugs. I checked them when I pulled them out and they had burnt away to around .065 gap or more my gauge only goes to .065

These plugs were exact fitment with gap accuracy on the money! My vehicle takes off now. The engine runs much smoother than it was running! I believe I'm now getting the accurate gas mileage now... No Misfires at all. I hand wrench them all the way in, the grooves were exact! I didn't even have to torque wrench them. But I made sure they were at the accurate torque. I recommend these plugs besides the OEM plugs.

These spark plugs are definitely functional and their performance is marvelous. Did not have any issues

Excellente qualité, fais très bien le travail, je recommande

Works great with my car

Great quality spark plugs. Just fitted them to my 2014 3.7 V6 Mustang. Runs fine with no issues. No need to gap them as they're per gaped. Bought via a US seller and arrived in the UK very quickly.

Funcionaron muy bien.

Solo le faltó la huacita , rondana o aro en la rosca de la bujía, ahora estoy en duda de que acople bien ala hora de darle el torque ala bujía