UMI Performance 64-72 GM A-Body Rear Coilover Brackets Bolt In (175LB Spring Rate)

This is the UMI Performance bolt-in rear coilover bracket kit for 1964-1972 GM A-Body vehicles. If you're looking to fine-tune your classic GM's suspension for better handling, a lower stance, or improved drag strip performance, this kit is a solid option. It allows for complete adjustment of ride height, spring rate, and damping, giving you the control to dial in your car's setup for specific driving conditions. The kit includes a Viking Performance shock with 19-way adjustable compression and rebound, paired with a 12-inch, 175 lb spring, which is ideal for drag racing applications.

The upper mount is designed as a direct bolt-in, though it does require drilling one additional hole for secure mounting. It's built to hold a true 2-1/2 inch racing coilover with a double-shear mount for added strength. The lower brackets are FEA-designed and bolt directly onto the stock rear lower control arm mounts, using the existing shock holes. Depending on your factory setup, you might need to drill an extra hole here too. A notable feature is the 2-hole trailing arm adjustment, which lets you precisely tune the instant center location. This adjustment is key for optimizing your car's launch characteristics at the drag strip or for fine-tuning rear steer response in auto-cross or road racing scenarios. This kit is designed to provide a 2-3 inch drop, giving your classic a more aggressive Pro-Touring stance.

This kit is manufactured in the USA using US materials and is designed for factory GM axle housings only. It's important to note that it may not clear all exhaust tailpipes, and it does not fit aftermarket axle housings from companies like Quick Performance, Currie, or Moser. If you're aiming for a significant upgrade in rear suspension adjustability and performance on your classic GM A-Body, this coilover bracket kit offers a well-built solution.