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Description
2017-2022 Superduty SRW Rear Air Spring Kit (ALF57409)Enhance the towing performance of your lifted 2017 2022 Ford F 250 or F 350 SRW 4WD with the specialized Air Lift LoadLifter 5000 air spring kit. This side mounted solution is specifically engineered to accommodate trucks with block spacer style lifts, providing up to 5,000 lbs. of load leveling capacity without the need for additional spacers. By restoring a level ride height, these adjustable air springs eliminate the squat and trailer sway common
Enhance the towing performance of your lifted 2017-2022 Ford F-250 or F-350 SRW 4WD with the specialized Air Lift LoadLifter 5000 air spring kit. This side-mounted solution is specifically engineered to accommodate trucks with block-spacer style lifts, providing up to 5,000 lbs. of load-leveling capacity without the need for additional spacers. By restoring a level ride height, these adjustable air springs eliminate the squat and trailer sway common in lifted applications, ensuring your Super Duty maintains optimal steering geometry and braking control. Built with tire-like durability and corrosion-proof components, this kit allows you to maintain the aggressive look of your lift while gaining professional-grade hauling stability.
Features
- Up to 5,000 lbs. of load-leveling capacity to eliminate squat and body roll on lifted trucks.
- Fully adjustable air pressure from 5 to 100 PSI for custom support based on load weight.
- Unique side-mounted design specifically compatible with leaf spring block spacer lifts.
- 2-ply fabric-reinforced air springs provide maximum strength and tire-like durability.
- Ultra-high-strength nylon composite end caps are as strong as steel but completely corrosion-proof.
- Exclusive upper and lower roll plates protect the air springs from sharp edges.
- Simple bolt-on installation requires only common hand tools and no frame drilling.
- Under-frame design ensures compatibility with most in-bed (gooseneck/fifth-wheel) hitches.
Compatibility Notes
- Specifically designed for 2017-2022 Ford F-250 and F-350 SRW (Single Rear Wheel) 4WD models.
- Lift Compatibility: Works with block spacer-style lifts; will NOT fit lifts that replace factory leaf springs or alter frame-to-leaf distance.
- Torture-tested to 1 million cycles for guaranteed longevity in heavy-duty and off-road environments.
Notes
- Do not exceed the vehicle's Gross Vehicle Weight Rating (GVWR).
- This product is backed by Air Lift’s limited lifetime warranty.
- Includes Air Lift's 60-day, no-questions-asked, money-back guarantee.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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- 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
4.2 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Great Place to Start
Format: Paperback
Clear and entertaining
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Reviewed in the United States on February 17, 2026
★★★★★ 5
Engaging Read for Beginners and Techies Alike
Format: Paperback
An engaging and accessible exploration of how computers really work. The author breaks down complex concepts into simple, relatable explanations, making topics like binary, logic gates, and basic circuits far less intimidating. For newcomers, it’s a great way to build a foundational understanding of computer theory with just a touch of electrical engineering.
As someone with a technical background, I still found it entertaining; the examples and analogies added fresh ways to frame ideas I already knew. It’s the kind of book that can bridge the gap between “I use computers” and “I understand what’s happening under the hood.”
Highly recommended for anyone curious about what makes hardware and software tick, whether you’re starting from scratch or just want a new perspective.
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Reviewed in the United States on August 19, 2025
★★★★★ 5
CODE is the book you should get.
Format: Paperback
The best book to enter the field. Grateful that Charles Petzold decided to write it, even happier this was one of the first books I picked up.
Recommend to everyone wanting to become a programmer, or just interested in computers.
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Reviewed in the United States on January 12, 2026
★★★★★ 5
If you only buy one technical computer book, this is it
Format: Paperback
Disclaimer: I owned the first edition for years and read it a dozen times, mainly for pleasure since it’s not only informative but also just enjoyable to read. I’m a professional software architect and have dozens of textbooks on computer science and engineering so I’ve been around the block.
This is the kind of book I would buy all for all my friends (if I had more than a couple) and family members (if they were even slightly into computers, which they aren’t sadly). Petzold does an exceptional job at describing digital logic and guides you through building a conceptual CPU from very first principles.
I think his bottom up approach is the way to go and has helped me understand complex topics in an extremely simple way. When I’m not reading fiction, this is my go to bedtime reading.
The second edition has about 100 more pages than the first and some content has been completely reworked and it’s great.
If you ever had even a passing interest in knowing how computers work at a very fundamental level, get this book!
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Reviewed in the United States on January 31, 2023
★★★★★ 4
First programmer?
Format: Paperback
As an ardent reader of the past 1st edition, I was fairly excited to get the latest version. That is, until I encountered the history chapter of the new edition.
For one thing, what I do NOT understand in this second edition is the newly added description of August Ada Byron (countless of Lovelace). The author claims it was Babbage who was the first programmer to design the engines, not Ada. I am not trying to start a futile argument here about who has more or fewer contributions, etc.
What I am trying to assert here is that it is undisputed that Ada (unless the new evidence arises) left *the very first demonstration* of what this seemingly imaginary machine, which didn't even physically exist, was capable of through her program. Because Babbage designed the engine itself, that doesn't automatically put him in the position of a programmer (despite Babbage being a brilliant engineer/scientist and may have had a simple or detailed program in his mind). However, it was Ada who gave a definite touch to programming concepts that ultimately led to modern-day programming. Ada deserves more recognition than a mere "tutorial writer," and she is certainly entitled to the title she deserves.
Other than that, like the previous edition, this book is a must-read for people who are from related/unrelated fields. I always loved the 1st edition, and I would do too with the 2nd. Still, I think history should always be approached with more care, particularly if matters have potential controversies.
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Reviewed in the United States on January 6, 2023