Skip to content

SPA TURBO 10-100 PSI Billet adjustable FMU - Red

Marsoni M251S
Sale price$94.40
Pay 4 payments of $23.60 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
SPA TURBO 10-100 PSI Billet adjustable FMU - RedEthanol and Methanol compatible and SAFE Easy installation FMU (Fuel Management Unit) has an adjustable, boost referenced 1: 14 raising rate Fine tune the fuel pressure your engine will need while under boost. 2x 6AN (9 16" 18tpi) inlet and 6AN (9 16" 18tpi)outlet fuel ports 1 4" boost reference port Includes accessories: O. D. 8 mm, O. D. and 6AN (for return only) Adjustable from 10 psi to 100 psi fuel pressure All SPA Turbo FMUs can also be used as
Easy Shipping

Quick Dispatch:

Your SPA TURBO 10-100 PSI Billet adjustable FMU - Red orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your SPA TURBO 10-100 PSI Billet adjustable FMU - Red ships.

Need Help?
Questions about SPA TURBO 10-100 PSI Billet adjustable FMU - Red, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for SPA TURBO 10-100 PSI Billet adjustable FMU - Red in your area.

Get Shipping Estimates

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
4.7 ★★★★★
Based on 1243 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
Mar Gee
Dallas, US
★★★★★ 5
Style and comfort
Size: Medium, Color: Black
Exactly what I was looking for. Style and sock thickness and comfort.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 14, 2025
A
Verified Purchase
Amazon Customer
Lexington, US
★★★★★ 5
Comfortable
Size: Medium, Color: Blue
So comfortable! They stay up perfectly love love love
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 7, 2025
L
Verified Purchase
LC
Draper, US
★★★★★ 5
LOVE THEM!!
Size: Small, Color: (001) Black / Black / Castlerock
LOVE! These socks are so comfortable! I wear a 5 in women's and a 3 in big kid shoes. The small fit me perfectly. I see where some say they run small but I can't say that was an issue for me. They are "snug" but thats what you want with a no show sock. I feel they have support vs the ones i used to buy at Walmart. They are very soft! I am actually buying more today and throwing my other ones in the trash!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
L
Verified Purchase
Lucy Mejia
Lake Worth, US
★★★★★ 5
So will not write down your foot
Size: Medium, Color: (001) Black / Black / Castlerock
I love these socks. They have a little bit of gel on the top of the heel for support in your tennis shoes and so your socks don’t write down. Very good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
T
Verified Purchase
Twins9
Lake Worth, US
★★★★★ 5
Comfy and Stay Put
Size: Medium, Color: (002) Black / Black / Halo Gray
These socks are honestly great. They’re super thin and light, so once you have them on, you kind of forget they’re even there. No bulky feeling in your shoes at all. The best part is they actually stay on. I hate no-show socks that slide down after five minutes, and these don’t do that. The little grip on the heel really works, so you’re not constantly adjusting them all day. They’re breathable too, which is nice if your feet run warm. They dry fast and don’t get that gross sweaty feeling. And there’s no annoying seam on the toe, so nothing rubs or feels uncomfortable. Basically, they’re just comfy, stay put, and don’t cause problems — which is all I want from socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 16, 2026

recommand products