Engineered Performance
Suspension Systems
Laser cut & precision welded Brackets
For optimal performance, our design maintains the vehicle’s caster throughout wheel-travel. Paired with our tuned Radflo coil-overs, it ensures steady handling across all terrains.
Custom Tuned Radflo coilovers
The result is a smooth high-speed ride with great bump control and agile street handling. If you think coil-overs are always sloppy, you haven’t experienced them tuned right.
Summit Machine Joints
The Summit Machine Large Flex Joint is our top-selling joint. Designed for builders seeking quality, it’s a rebuildable spherical joint that consistently delivers on performance and longevity, with some lasting up to 100,000 miles.
Sharp Steering
For optimal performance, our design maintains the vehicle’s caster throughout wheel-travel. Paired with our tuned Radflo coil-overs, it ensures steady handling across all terrains.
Tough Subframe
High quality materials mixed with top tier fabrication and years of real world experience equal best in class subframe armor and components.
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Cant decide on just one category? Just browse the whole catalog.
Quality Designed & Built
“A quality designed and built suspension system should do more than just flex over rocks. It should provide the user with great performance both on and off-road. We believe that with enough research and testing, the correct components will equal predictable handling in all situations providing the user with the satisfaction one expects from a performance suspension system.”
Brian Osborne, founder of 4WU
Latest PRODUCTS
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New
Phase-4 Rear 3Link Raw DOM Tubing Bundle$235.96 -
New
4Runner 95-02 Chassis Reinforcement and Steering box mounting plates$299.99 -
Product on sale
Cantilever Rear SuspensionFrom: $3,601.91 -
Boxed Skid Plate System 117From: $499.99