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21-23 Ford F-150 Superlift 84123 Lift Kit Rear Shock Box SL Shadow 6in. Lift

Upgrade your F-150's ride and handling with Superlift's Shadow Series shocks. Engineered for lifted setups, these rear shocks deliver smoother control, improved stability, and durable performance both on and off-road.

Top Features

  • Designed for 6” lifted 2021–2023 Ford F‑150

  • 10-stage velocity-sensitive valving for controlled ride

  • Durable twin-tube design with steel body

  • Chrome-plated shaft for corrosion resistance

  • Bolt-on installation using factory mounts

  • Assembled in Louisiana

  • Backed by a 1-year warranty

Vehicle Fitment

  • Fits 2021–2023 Ford F‑150

  • Compatible with 4WD models

  • Fits multiple trims: XL, XLT, Lariat, King Ranch, Platinum, Limited, Tremor, Raptor

  • Works with engines: 2.7L, 3.3L, 3.5L (Gas/Hybrid), 5.0L V8, 3.0L Diesel

Vendor: Superlift
SKU: SLF84123
Availability: 73 In Stock
$ 139.99 USD
On-Sale $ 139.99 USD
Normally
Better hurry, only 73 left in stock.

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UPC: 804260106317
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21‑23 Ford F‑150 Superlift 84123 Lift Kit Rear Shock Box SL Shadow 6 in. Lift

A high‑performance rear shock solution designed specifically for lifted or stock 2021–2023 Ford F‑150 trucks, the Superlift 84123 rear Shock Box from the Shadow Series delivers a perfectly balanced ride that's both smooth and controlled. Built with precision and durability in mind, this shock box restores confidence behind the wheel—whether cruising the highway or handling rugged off‑road terrain. Its advanced valving and corrosion‑resistant construction make it the go‑to choice for Ford enthusiasts seeking lasting comfort and stability.

Key Features

  • Designed for stock or lifted Ford F‑150 pickups

  • Durable chrome‑plated steel shaft for smooth, long-lasting performance

  • 10‑stage velocity‑sensitive valving for optimal control over bumps and road variations

  • Reinforced steel body with corrosion-resistant coating

  • Ensures proper suspension travel at 6 in. lift height

  • Twin‑tube Shadow Series design engineered for both on‑road comfort and off‑road capability

  • Proudly assembled in Louisiana

  • Backed by a one‑year manufacturer warranty

Benefits

  • Significantly improves handling, stability, and overall ride quality

  • Provides a smooth, responsive driving experience in varied conditions

  • Maintains proper suspension geometry even when lifted, reducing wear on other components

  • Built to resist corrosion, ensuring reliable performance over time

  • Straightforward bolt‑on installation saves time and effort

  • One‑year warranty offers peace of mind and protection against defects

Product Specs

  • Lift Height: 6 in.

  • Finish: Corrosion‑resistant grey coating on steel body

  • Shaft Material: Chrome‑plated steel

  • Body Style: Twin‑tube Shadow Series shock box

  • Weight (pack): Approximately 26 lbs 

  • UPC: 804260106317 

  • Sold as a rear shock pack (set of two) suitable for driver or passenger side 

Install Difficulty Level

Installation is straightforward and achievable by most DIYers: expect to complete the job in 1–3 hours, as per installation time estimates from authorized dealers. All mounting hardware fits directly into existing factory locations, delivering a fast, hassle‑free setup.

Vehicle Fitment

Compatible with the following vehicles without drive‑train or engine restrictions:

  • Year Range: 2021–2023 Ford F‑150

  • Models: XL, XLT, SSV, Raptor, Police Responder, Platinum, Limited, Lariat, King Ranch, Tremor

  • Drive Configuration: 4‑Wheel Drive

  • Suitable for a variety of engine types, including 2.7 L V6 (gas), 3.3 L V6 FLEX, 3.5 L V6 (gas), 3.5 L V6 full hybrid (FHEV), 5.0 L V8 FLEX, and 3.0 L V6 diesel on certain trims

For any inquiries or corrections regarding this description, customers are encouraged to reach out to the MPT Performance experts at (407) 636‑7077 or by email.

Shipping Policy

MPT is proud to offer free shipping on most orders over $149.

  • Free shipping applies only to the contiguous United States. Shipping and handling charges will apply to orders outside the contiguous US, and the buyer is responsible for any duty fees or taxes their home country may charge to import goods.
  • With free shipping, we will choose the best shipping method for your order. We use all major carriers, including USPS, FedEx, UPS, and DHL.

Turnaround Times:

  • MPT Tunes have a standard turnaround time of 2-3 business days, beginning once we receive your MPT Tune Form.
  • We do not process orders on weekends or observed holidays, which do not count as business days.
  • Physical items that are in stock at MPT and ordered by 4PM EST will be shipped the same day. Orders placed after 4PM EST will be processed on the following business day.

Special Considerations:

  • Items not stocked at our location will follow the same processing times but may experience lead-time delays and could incur additional charges. Shipping methods may vary for these items based on what was paid and the requested delivery speed. If you need an item by a specific deadline, please contact an MPT Expert.
  • SCT Tuner Orders with the Prioritized Order option must have their tune forms submitted by 3PM EST to be completed the same day. Forms submitted after this time will be processed the next business day.
  • Orders will ship to the billing address listed on your order. If paying by credit or debit card, we can only ship to the billing address. Contact an MPT Expert for assistance if you need a different shipping address.

MPT Performance Returns and Refund Policy

A Return Authorization Number is required for all returns. Please contact an MPT Expert to obtain an RA # before sending anything back to us for any reason.

MPT tuning charges and license fees are Non-Refundable. The sale is final when MPT has sent the tune file over email. This includes both new tune purchases and tune updates.

Products other than MPT tunes, digital products, and MPT decals may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed it is non-refundable. We reserve the right to deny the return, should the product be received and it display signs of installation or unmentioned damage.

For vehicle programmers/tuners, the vehicle must be returned to stock if a program was installed. If a tuning device is returned and has not been returned to stock, a refund will not be issued, and your tuner will not be sent back without a shipping and handling fee.

The customer is responsible for all shipping charges incurred during the return process.

Amount Refunded:
•Returns post marked before 30 days from the date the item was received will be refunded the purchase price, minus a 25% restocking fee and the cost of shipping.
After 30 days, all sales are Final.
•Shipping charges along with any package insurance are non-refundable. If your purchase was shipped with our Free Shipping option, the cost of the shipping will be subtracted from the total refund amount.

HP Tuners Credits are assigned to the HP Tuners product with the submitted serial number and cannot be transferred. Once you load a tune to your vehicle with the RTD, these credits are Non-Refundable.

Digital products and files that have no ability to be taken back physically, such as an SCT Tuner Unlock, are Non-Refundable.

nGauge Tune License Fee is included in your initial purchase of MPT tunes for the nGauge. This fee is factored into the price of the tunes and becomes Non-Refundable when the stock file has been emailed to MPT.

MPT Decals are Non-Refundable, once they have been received by the customer.

Year Make Model Submodel
2021-2024 Ford F-150 King Ranch
2021-2024 Ford F-150 Lariat
2021-2023 Ford F-150 Limited
2021-2024 Ford F-150 Platinum
2021-2024 Ford F-150 Police Responder
2021-2023 Ford F-150 Raptor
2021-2024 Ford F-150 SSV
2024 Ford F-150 STX
2021-2024 Ford F-150 Tremor
2021-2024 Ford F-150 XL
2021-2024 Ford F-150 XLT

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