Stage 4 handling and lowering kit features 4.5″/6″ lowering combined with UMI’s #cornermax A-arms. The Stage 4 kit transforms your squarebody into a corner carving machine. •  UMI #cornermax upper and lower a-arms increase...

Stage 3.5 handling and lowering kit features 4.5″/6″ lowering combined with UMI’s street performance A-arms. Viking double adjustable shocks make this a very capable corner carving setup. •  UMI lowering springs and CP4S4...

Stage 3 handling and lowering kit features 4.5″/6″ lowering combined with UMI’s street performance A-arms. Part of the #umitrucks line of products. •  UMI upper and lower a-arms increase caster and improve straight line...

UMI’s bolt-in upper a-arm mount is a key component in the #cornermax system for squarebody trucks. This mount features strong gusseted construction and a race inspired double shear shock mount. Durable black powder coat. •  High quality...

Street performance tubular upper a-arms add caster to improve stability and steering feel. Race Proven construction ensures crisp, precise handling. •  Power Tour and daily driver proven•  1-1/4″ heavy-duty tubular construction...

UMI’s Race Proven lower a-arms bring race car handling to your truck. Double shear coilover-only lower mounts hold all popular coilover assemblies. •  Race Proven #cornermax geometry.•  Increased caster improves steering...

UMI’s adjustable upper a-arms feature race quality, adjustable rod ends. Camber and caster can be adjusted, often without the need for shims. Race Proven #cornermax adjustable a-arms. Adjust camber and caster, often with no shims required...

Street performance tubular lower A-Arm feature heavy duty cross shafts, Delrin bushings and a host of other features. Power Tour and daily driver proven. Accepts UMI lowering spring, factory springs and most other aftermarket springs. Heavy-duty...

If you have a factory parking brake cable on a 63-72 C10, attach this bracket around the QA1 truck arms to hold the cable in place.  

These Heavy Duty Tie Rod Sleeves are manufactured from solid steel hex stock then zinc plated for durable good looks and corrosion resistance. These are stronger than stock OE split sleeves and easier to adjust. Thread 5/8 LH - 11/16 RH Length...

QA1 rear suspension conversion systems provide easy, bolt-in options to replace your coil springs on factory truck arms—without any cutting, welding, or other fabricating. Each kit contains frame brackets, axle brackets, linkage assemblies, a...

QA1’s C10 bolt-on rear suspension system is designed to convert trucks originally equipped with a coil-spring rear suspension to coil-overs. Made in the USA, this system relocates the coil-overs to the outside of the frame rail, closer to the...