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  See more parts for Ford F-250
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Kryptonite 4.5" Lift Dual Rate Coil Springs Ford F-250 | F-350 | F-450 | F-550 2005+ - KRFC45
Kryptonite 4.5" Lift Dual Rate Coil Springs Ford F-250 | F-350 | F-450 | F-550 2005+ - KRFC45 - Image 4 Kryptonite 4.5" Lift Dual Rate Coil Springs Ford F-250 | F-350 | F-450 | F-550 2005+ - KRFC45 - Image 2 Kryptonite 4.5" Lift Dual Rate Coil Springs Ford F-250 | F-350 | F-450 | F-550 2005+ - KRFC45 - Image 3 Kryptonite 4.5" Lift Dual Rate Coil Springs Ford F-250 | F-350 | F-450 | F-550 2005+ - KRFC45 - Image 4

Kryptonite KRFC45 Dual Rate Lift Coil Springs

Experience the perfect blend of durability and comfort with the Kryptonite KRFC45 Dual Rate Lift Coil Springs. After extensive testing in various conditions—from everyday driving to challenging off-road adventures—these springs have proven themselves as a top-tier choice for heavy-duty truck enthusiasts. Designed specifically for rugged use, the KRFC45 springs offer impressive load handling capabilities while ensuring a smooth ride.

Customer Feedback

“I installed the KRFC45 springs on my F-350, and I can’t believe the difference! They handle heavy loads like a champ, and the ride is surprisingly comfortable. Highly recommend!” - Mike R.

“These springs are a game changer! My truck feels more stable, even when loaded. Just be aware, the ride is a bit stiffer than I expected, but it’s worth it for the support.” - Jessica T.

Key Features

  • Provides 4.5" lift for 2005-2019 models and 5.5" lift for 2020+ models
  • True Dual Rate design for optimal performance
  • Durable powder-coated black finish
  • Shot peened for enhanced durability
  • Improved strength and rigidity compared to OEM springs
  • Direct fit installation for easy setup
  • Made in the USA with top-quality materials

Technical Specifications

The KRFC45 springs are engineered for the 6.7L Powerstroke, ensuring that they meet the demands of heavy-duty applications. With a focus on maintaining ride comfort while improving load capacity, these springs are ideal for those who utilize their trucks for both work and play.

Fitment

  • Ford F-250 2005-2009
  • Ford F-250 Super Duty 2010-2024
  • Ford F-350 2005-2016
  • Ford F-350 Super Duty 2017-2024
  • Ford F-450 2017-2024
  • Ford F-550 2017-2024

With the Kryptonite KRFC45 Dual Rate Lift Coil Springs, you can trust that your truck will not only look great but also perform exceptionally well under any condition. Upgrade your ride today!

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2005-2009
 Ford F-250
2010-2024
 Ford F-250 Super Duty
2005-2016
 Ford F-350
2017-2024
 Ford F-350 Super Duty
2017-2024
 Ford F-450
2017-2024
 Ford F-550

Kryptonite Logo

Kryptonite Steering and Suspension

Kryptonite Steering and Suspension Products is based in northern California. It takes advantage of the nearby rugged terrain of the Sierra Nevada foothills to push the durability of its products both on and off road. Whether you are looking for replacement parts that you can trust for your daily driver or need something to stand up to the demands of competition driving, Kryptonite has you covered. The brand takes pride in making “the most hardcore parts on the market” backed by the best warranty out there.

For several years, Kryptonite has used the heavy-duty full-sized Duramax Diesel truck platform as the proving grounds for its product lineup. Its impressive lineup of steering and suspension parts has grown to become the best and most reliable around. This is all thanks to the extensive research and development that the brand has undergone, in addition to the countless miles of rigorous testing.

Kryptonite Parts and Warranty

Kryptonite Steering and Suspension Products is known for its high quality, durability, strength, and longevity. Kryptonite offers upgraded steering and suspension products (as the name implies), as well as leveling kits for improved ride quality. Its upper control arms are a seemingly popular upgrade for 2011+ General Motors HD trucks.

The brand stands firmly behind its products and guarantees they will last for as long as you own your truck or side-by-side. Kryptonite boasts a “no fine print lifetime warranty.” In other words, Kryptonite Steering and Suspension components are warrantied for life to their original purchaser. This warranty protects against any manufacturer defects, premature wear, or breakage. “Race it, jump it, off road it, sled pull it, wreck it, lift it, level it, lower it.” If you can break it, the company guarantees it will replace it, so long as you have purchased from an authorized dealer like Vivid Racing.

Upgrade to Kryptonite at Vivid Racing

Whether for work, play, or competition, you can trust Kryptonite Steering and Suspension Products for your vehicle. Vivid Racing is proud to carry an extensive lineup of Kryptonite parts, which includes handling arms, hand tools, ball joints, tie rods, steering rack conversion kits, and complete suspension packages. If you have any questions regarding Kryptonite or need help locating an item, please call our sales team at (480) 966-3040. 

Your product(s) must be purchased either directly, or through one of our authorized dealers.

Your product(s) must be registered within 90 days of purchase. Registration will take place at kryptoniteproduct.com Click the warranty tab on the home page and follow to Warranty Registration link. Proof of purchase will be required. Without this information and warranty claims will be void. Without proper registration of you part(s) you will NOT be covered.

Warranty covers product replacement only. Warranty will never be a parts cost refund. warranty will never cover any collateral damage costs.

If you believe you have a part that failed and may be covered under warranty, you must first make a warranty claim. Once you have submitted your claim information you will be contacted within 2 business days with further instructions.

All parts to be considered for warranty replacement must first be physically inspected by a representative of KRYPTONITE PRODUCTS. If the part(s) in question are deemed to have failed in a way other than installation/user error. The customer will be provided with a replacement part(s) of equal or improved quality.

No replacement parts will ever be provided to a customer before a physical inspection of the failed part(s) by a KRYPTONITE PRODUCTS representative.

(Kryptonite No Fine Print Lifetime warranty)-Kryptonite steering and suspension components are warrantied for life to their original purchaser. This warranty is against any manufacturer defects, premature wear or breakage. Race it, jump it, off road it, wreck it, lift it, lower it, sled pull it, I think you get it? We don't care. If you can break it we will replace it.
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Wholesale price $235.99
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Product Added At Thursday 28 July, 2022
Product Modified At Tuesday 29 July, 2025
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Kryptonite Products $200.00 $399.99 ? $379.99 ? 2025-07-29 20:37:14


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