Shop / Suspension & Steering / Kryptonite 4.5"/5.5" Lift Dual Rate Coil Springs for 2005-2026 Ford F-250/F-350
Kryptonite Products
Kryptonite 4.5"/5.5" Lift Dual Rate Coil Springs for 2005-2026 Ford F-250/F-350
MPN: KRFC45SKU: KRFC45
After years of testing, from daily driving to harsh off road terrain, heavy hauling and everything in between, the Kryptonite 4.5"/5.5" Dual Rate Lift Coil Spring set is now available. This is the most durable and premium spring option on the market. Designed with heavy duty truc
$399.99
Ships From Supplier · Ships in 3–10 business days
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Fitment sensitive
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This product is vehicle-specific. Select your year, make, model, engine and transmission to confirm compatibility before adding it to your cart.
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Warranty
Warranty Information Pending
Warranty information has not yet been provided for this product. Contact FullSpecDiesel for help locating the applicable manufacturer or supplier warranty.
View complete warrantyAfter years of testing, from daily driving to harsh off road terrain, heavy hauling and everything in between, the Kryptonite 4.5"/5.5" Dual Rate Lift Coil Spring set is now available. This is the most durable and premium spring option on the market. Designed with heavy duty truck use in mind, this spring provides rugged load handling capabilities while maintaining an extremely comfortable ride. Using top rated materials we can produce a plush ride with minimal spring sag. Our true Dual Rate Spring can truly provide the best of both worlds. Mile after mile our springs will hold up to any truck, and any job. Installing these coils on a gas Super Duty will result in a VERY stiff ride. We DO NOT recommend this whatsoever.
4.5" vs 5.5" Explained
You may notice our springs, and other manufacturers, have Ford springs listed as 4.5"/5.5", depending on the year. The answer is quite simple, the 2020 and later Ford Super Duty trucks sat 1" lower from the factory than its predecessors. This means the same 4.5" lift coil on a 2005-2019 Super Duty will provide 5.5" of lift on the 2020+ Super Duty. No other parts changed, the truck just started out lower than before. The only time this is not true is for the 2020+ Super Duty TREMOR, these come from the factory with a 2" lift/level, and makes them 1" taller than a stock height 2005-2019. Using our 4.5"/5.5" spring will lift the front of a 2020+ TREMOR 3.5".
After years of testing, from daily driving to harsh off road terrain, heavy hauling and everything in between, the Kryptonite 4.5"/5.5" Dual Rate Lift Coil Spring set is now available. This is the most durable and premium spring option on the market. Designed with heavy duty truck use in mind, this spring provides rugged load handling capabilities while maintaining an extremely comfortable ride. Using top rated materials we can produce a plush ride with minimal spring sag. Our true Dual Rate Spring can truly provide the best of both worlds. Mile after mile our springs will hold up to any truck, and any job. Installing these coils on a gas Super Duty will result in a VERY stiff ride. We DO NOT recommend this whatsoever.
4.5" vs 5.5" Explained
You may notice our springs, and other manufacturers, have Ford springs listed as 4.5"/5.5", depending on the year. The answer is quite simple, the 2020 and later Ford Super Duty trucks sat 1" lower from the factory than its predecessors. This means the same 4.5" lift coil on a 2005-2019 Super Duty will provide 5.5" of lift on the 2020+ Super Duty. No other parts changed, the truck just started out lower than before. The only time this is not true is for the 2020+ Super Duty TREMOR, these come from the factory with a 2" lift/level, and makes them 1" taller than a stock height 2005-2019. Using our 4.5"/5.5" spring will lift the front of a 2020+ TREMOR 3.5".
Product conditions
Professional installation is recommended.
- Return eligibility
- Returnable within 30 days of confirmed delivery, in original condition, with an approved RMA
- Return window
- 30 days from confirmed delivery
- Restocking fee
- No restocking fee
- Return shipping
- Customer pays return shipping on voluntary returns
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Cancellation is only possible before the supplier order is submitted
- Warranty provider
- Warranty Information Pending
- Warranty duration
- Pending verification
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- Kryptonite Products
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.