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Primary Billet Spring Cup
Primary Billet Spring Cup
Primary Billet Spring Cup
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Primary Billet Spring Cup

Marsoni M251S
Sale price$99.99
Pay 4 payments of $25.00 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Primary Billet Spring CupThis product is for those using higher engagement springs and want their spring cap to hold up. Made from a solid billet aluminum piece with a high quality bushing for smoother shifting this is the product that you want. There are 2 types of sheaves. One clutch which is the updated movable sheave has stainless steel sliders. The older one does not. Most if not all 120hp x3 cars come with the non stainless steel sliders. Most if not all Turbo RR models
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Your Primary Billet Spring Cup orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • 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.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 231 reviews
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Product Reviews
J
Verified Purchase
Judy Fletcher
San Leandro, US
★★★★★ 5
No slip low socks
Number of Items: 3, Color: Black/White (3-pairs), Size: Medium
Perfect! ❤️ these!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
S
Verified Purchase
Susan
West Palm Beach, US
★★★★★ 4
Stay put!
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
Nice and thin, soft, and stay put. I wear an 8 shoe and don’t like a thick sock taking up room. These socks are a bit tight on big toe. Wish they came in large.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 10, 2023
S
Verified Purchase
Stephanie Robnett
Bozeman, US
★★★★★ 5
The best
Number of Items: 3, Color: White/Neutral (3-pairs), Size: Medium
The best no show socks I have found. Stay in place very well and hold up wash after wash. I have tossed all the other brands I’ve bought over the years and stocked up on these as I was tired of digging through the drawer hoping to find a clean pair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2024
G
Verified Purchase
Ginni
Waukegan, US
★★★★★ 5
Love these.
Number of Items: 3, Color: White (3-pairs), Size: Medium
I have them in black and white. I use them everyday in all shoes. These are very versatile and a great quality material. They take a looong time to wear and they stay in place. Very washable and good material. They are not too thick and they do not shrink. I do air dry mine. They do not hold smells even in the summer heat.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 7, 2024
M
Verified Purchase
Maria White
Chelsea, US
★★★★★ 5
Perfect!
Number of Items: 3, Color: Pink Quartz Assorted (3-pairs), Size: Medium
My new favorite socks! True to size, fit perfectly, and the best part is they do not slide off your foot! 10/10 recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 10, 2025

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