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- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
For Your Every Summer RSVP, with Code: SUMMER15
Description
UMI Performance 64-72 GM A-Body 1in Lowering Spring Front - SetA spring is a spring right? Wrong! When UMI chose to manufacture our own line of springs we went all out. Designed in conjunction with a leading Sprint Cup chassis engineer, these springs are the best in the business. Our springs are wound from 5160 CrSi premium wire and feature a linear 530 lb in rate. The 4050Fs are stiffer than stock to provide increased performance with decreased body roll and a lower center of gravity. These springs are suitable
A spring is a spring right? Wrong! When UMI chose to manufacture our own line of springs we went all out. Designed in conjunction with a leading Sprint Cup chassis engineer, these springs are the best in the business. Our springs are wound from 5160 CrSi premium wire and feature a linear 530 lb/in rate. The 4050F’s are stiffer than stock to provide increased performance with decreased body roll and a lower center of gravity. These springs are suitable for Auto-x and Pro-Tour applications as well as corner carving/cruising. The ride height is engineered for a 1” lowering with standard SBC, aluminum head and intake Big Block and Pontiac 400 as well as LS power (lightened cars may require spring trimming). The 4050F’s are also suitable for full weight Big Block applications when nose down rake is desired. They have a tough black powder coat finish and UMI proudly manufactures these premium quality springs in the USA.Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.3 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Does the job
Size: 300A
Fuses seem good quality. Did what they need to do. Would buy again.
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Reviewed in the United States on October 31, 2025
★★★★★ 5
Simply
Size: 300A
Nice quality
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Reviewed in the United States on October 3, 2025
★★★★★ 5
Great price and nice quality
Size: 300A
Great price and nice quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 26, 2024
★★★★★ 4
Great price, but don't stack multiple wires
Size: 300A
I used this as a junction point on a 1 gauge wire. I added an 8 gauge wire to one side, and the cover would not seat. I had to bend and maneuver the ring terminals to make the cover catch. For the price of the items, if used without any secondary wires attached and interior use only, this is an unbeatable deal.
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Reviewed in the United States on January 30, 2026
★★★★★ 5
Great Quality
Size: 300A
Exactly what I needed. Good quality and worked perfectly.
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Reviewed in the United States on May 21, 2025
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