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Spark Plug Indexing Washers

Marsoni M251S
Sale price$15.99
Pay 4 payments of $4.00 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Spark Plug Indexing WashersIndexed Spark Plugs align the open end of the electrode towards the intake port. The hottest flame meets the new fuel charge for a performance gain, increases h. p, fuel mileage, & plug life. This is a speed secret car racers have used for years. You simply mark the electrode side of the plug with a magic marker on the porcelain. You then shim the plug with washers to align the electrode towards the intake port. Fits 14mm plugs. 4 washers in each kit.
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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.
  • To process your return/exchange, please contact us at [email protected]
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4.6 ★★★★★
Based on 1659 reviews
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Verified Purchase
Desirae
Birmingham, US
★★★★★ 4
Small but cute
Color: A1 - Pink 1 Pack
smaller than I thought but perfect for travel. Seems durable
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 7, 2026
A
Verified Purchase
Amanda Gross
Pawtucket, US
★★★★★ 5
Adorable, functional, and great for travel
Color: A1 - Pink 1 Pack
Adorable, good quality, small but fits enough for travel. I’ve had no problems with the zipper or any of the inside functions. I like that you can remove one of the pieces to fit something larger in it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
S
Verified Purchase
Samantha Emanuel
Lowell, US
★★★★★ 5
Perfect size and quality
Color: Velvet 1 Pack - Navy Blue, Color: Velvet 1 Pack - Navy Blue
This was a gift for my teen daughter she’s collecting jewelry now and this was perfect for her. This is also great for traveling! It holds lots of little pieces and feels soft. This is a great gift idea. Months later and it’s still in great condition. Easy to use and take along anywhere.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
J
Verified Purchase
Jarrod Shupe
Alexandria, US
★★★★★ 5
Great value for the $
Color: A1 - Pink 1 Pack
My wife loves it for home and travel! We built, easy to open, sturdy, and fits her jewelry when needed.
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Reviewed in the United States on May 12, 2026
B
Verified Purchase
Brenda Marrero
Natrona Heights, US
★★★★★ 5
Pretty and perfect size
Color: A1 - Pink 1 Pack
Love this box is very pretty, perfect to have my everyday jewelry and perfect for travel.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026

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