Introducing the CNC Fab 99-10 Super Duty Rear 4-Link Suspension Kit
When you’re pushing big horsepower out of a 7.3L, 6.0L, or 6.4L Powerstroke at the drag strip, every millisecond counts. You can build all the torque in the world, but if your suspension can't put the power to the pavement, you’re just wasting diesel and rubber.
Factory leaf springs have served their purpose, but for serious performance builds, they’re an issue. Violent axle wrap, unpredictable wheel hop, and heavy sprung weight stand between you and a win.
That’s why we engineered the CNC Fabrication Super Duty Rear 4-Link Suspension Kit. It’s a complete, near bolt-on replacement for your stock rear suspension that turns massive torque into pure forward traction.
Why Ditch the Factory Leaf Springs?
Heavy leaf springs create slop in your rear end. When you build boost on the line and launch, the torque twisting your rear axle forces the leaf springs to bend. This causes severe axle wrap.
Not only does axle wrap kill your 60-foot times, but it also creates severe shock loads that can snap driveshafts, ring and pinion gears, and axle shafts.
By ditching the leaves and installing a true 4-link system, you convert your rear suspension into a controlled, rigid yet adjustable geometry setup.
Race Proven Precision Engineering
We didn't cut corners on materials or design. Every part of this kit is fabricated with race proven components engineered to handle brutal launches at the drag strip:
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4130 Chromoly Construction: Lightens your rear unsprung weight significantly while providing incredible structural rigidity.
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Adjustable Instant Center: Fine tune your anti squat and weight transfer dynamics so your rear tires bite hard the moment you drop the hammer.
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XM Series PTFE & Kevlar Lined Heim Joints: Eliminates rubber and polyurethane bushing deflection, offering bind free movement and maximum durability.
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Precision Laser Cut Brackets: Engineered for exact fitment and strength under load.
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Complete System Integration: Replaces factory springs with upper and lower control arms, a Panhard bar, shock mounts, and an anti-roll bar assembly.
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Coilover Ready: Fully compatible with AFCO, QA1, Penske, and other popular coilovers featuring 1/2" or larger eyelets.
Tailored to Your Build: DIY or Ready-to-Install
Every build is different, which is why we offer this kit in two configurations:
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DIY Non-Welded Kit (SKU 428020): Perfect for fabricators and builders who want to weld out the kit themselves in their own shop.
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Fully TIG-Welded Kit (SKU 428021): Hand-welded in-house by our team in Bryan, Ohio. Delivered uncoated so you can powdercoat or paint it to match your truck's color scheme.
Local to Ohio? We also offer complete installation services directly at our Bryan, OH shop.
Stop Wasting Torque. Start Winning Rounds.
If you’re tired of axle wrap ruining your launches and want consistent, repeatable ETs round after round, it’s time to upgrade with the 1999-2010 CNC Fab Super Duty Rear 4 Link Suspension Kit!
