★★★★★ 5
A reliable set of spark plugs.
They’re made in Germany, what else can you say
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
STAHLWILLE 54KK INHEX Innensechskant Einsatz 10mm Antrieb 12,5mm (1/2") - 03280010
Marsoni
M251S
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Friday, May 29
STAHLWILLE 54KK INHEX Innensechskant Einsatz 10mm Antrieb 12,5mm (1/2") - 03280010STAHLWILLE 54KK INHEX Innensechskant Einsatz 10mm Antrieb 12,5mm (1 2") Stahlwille Code 03280010 Beschreibung: mit Kugelkopf zum Bettigen von Innensechskantschrauben Schwenkwinkel bis 25 nach jeder Seite Chrome Alloy Steel verchromt Lnge: 103mm Technische Daten: Code 03280010 Schlsselweite fr Innensechskantschrauben in mm 10 L1 mm 100 L2 mm 62 d mm 22,7 Gewicht g 120
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4.0 ★★★★★
Based on 1552 reviews
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Product Reviews
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them.
The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine.
Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Upgrade from OEM
After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is.
These were an upgrade from OEM parts. They were gapped perfectly for the car.
They took 20mins to fit and work fine.
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Reviewed in the United States on February 11, 2026
★★★★★ 5
Very good
The best quality. Runs like new again.
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Reviewed in the United States on March 12, 2026
