★★★★★ 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
![49.5mm Dog Bone Universal Shaft GRK [Shibata] R31W274](https://cdn.shopify.com/s/files/1/0683/9825/2271/files/R31W274.webp?v=1777306055)
49.5mm Dog Bone Universal Shaft GRK [Shibata] R31W274
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
49.5mm Dog Bone Universal Shaft GRK [Shibata] R31W274Applicable parts [R31W205] Can be used as a universal shaft for rear universal set. [R31W308] Can be used for GRK3 AWD front universal set Product description 1. [R31W205] +4mm extension to GRK3 genuine universal shaft (45. 5mm). 2. [R31W308] 1. 5mm shorter than the GRK3 AWD genuine front universal shaft (51mm). It is useful when the genuine shaft bottoms out in the drive cup or the universal shaft is not long enough depending on the tread width of
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Your 49.5mm Dog Bone Universal Shaft GRK [Shibata] R31W274 orders ship within 1-2 business days.
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- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.5 ★★★★★
Based on 1786 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.
WAS THIS REVIEW HELPFUL?YesReportShare
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.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 11, 2026
★★★★★ 5
Very good
The best quality. Runs like new again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
