UMI 64-72 GM A-Body Coil Over Conversion Brackets Kit -1in to +1in Ride Height - 175lb Spring Rate

Starting with a design honed through FEA analysis, these UMI rear coilover conversion brackets are built to bolt directly onto your existing Quick Performance rear lower control arm mounts. This kit is designed for a range of classic GM A-Body vehicles, including popular models like the Chevrolet Chevelle, Buick Skylark, and Pontiac GTO, allowing you to upgrade your suspension for improved handling and adjustability. The reinforced upper mount is specifically made to accept a 2-1/2” racing coilover, setting the stage for a significant suspension overhaul.

What really sets this kit apart is the comprehensive adjustability it offers. You get full control over ride height, with a range from -1 inch to +1 inch, and the spring rate can be tuned with the included 175lb springs. Beyond that, the brackets feature a 2-hole trailing arm adjustment system. This allows you to precisely calibrate the instant center location, which is crucial for tuning how the rear suspension reacts under acceleration and braking. The lower brackets are reinforced to handle the stresses of performance driving, and the entire kit is manufactured and tested in Philipsburg, Pennsylvania, using materials sourced from the United States.

While the kit is designed as a bolt-in for the lower control arm mounts, the manufacturer notes that welding is required for drag racing applications. It's recommended to install the brackets first and then take center-to-center measurements at your desired ride height to ensure you select the correct shock part numbers for your setup. This kit is intended for use with Quick Performance rear components, so keep that in mind during your build.