UMI Performance

The Story Behind UMI Performance

Few brands in the performance aftermarket can claim as authentic an origin story as UMI Performance. Founded in 2002 by Ryan Kirkwood — a racer who started fabricating parts for his own car in his father Denny's machine shop — the company grew organically from a single enthusiast's need into one of the most respected names in muscle car suspension. Ryan paid tribute to his father's original business, Utmost Machine, by naming the new venture UMI. That hands-on, car-guy spirit has never left the brand.

Based in Philipsburg, PA, UMI Performance designs, machines, and assembles its products entirely in-house inside a dedicated facility. Every step of the process — from CNC machining and laser cutting to MIG and TIG welding and powder coating — is performed under one roof. This top-to-bottom control over manufacturing is a key reason enthusiasts trust UMI parts to perform exactly as advertised, whether on the street or at the track.

Built for the Muscle Car Enthusiast

UMI's catalog is laser-focused on the vehicles that matter most to performance fans: GM A-bodies, F-bodies, B-bodies, G-bodies, and Ford Mustangs, spanning the 1960s through the early 2000s. Rather than trying to be everything to everyone, UMI has channeled decades of development into a deep, highly refined lineup of chassis and suspension components for these specific platforms.

At the heart of the lineup are suspension control arm spacers — one of UMI's most popular product families. These precisely engineered spacers let builders fine-tune ride height and stance without cutting or welding, making them an ideal first step for any suspension build. Complementing them is UMI's extensive range of suspension control arms, which are constructed from USA-made DOM steel tubing and available with polyurethane or Delrin bushings for a range of street-to-strip applications. UMI's tubular A-arms are engineered to increase caster, sharpen steering feel, and improve high-speed stability — all while bolting directly into stock locations.

For builders looking to transform their car's handling and stance in a single purchase, UMI offers comprehensive coil spring, tie rod sleeve, and sway bar kits that bundle critical front-end components together. Those chasing a lower, more aggressive look will find UMI's coil spring lowering kits to be thoughtfully engineered for specific platforms, preserving geometry while dropping ride height by one or two inches. Rounding out the structural side of the catalog, UMI's shock tower braces tie the front chassis together to reduce flex and sharpen response — a particularly meaningful upgrade on older unibody muscle cars.

Why Enthusiasts Choose UMI

UMI's reputation is built as much on customer service as on product quality. The team is known in the community for going above and beyond — answering installation questions over the phone and supporting customers regardless of where they purchased their parts. Combined with the fact that every component is designed, tested, and raced by people who genuinely love these cars, it's easy to understand why UMI has earned loyal fans from drag strips to car shows across the country.

• All products designed, manufactured, and tested in the USA
• CNC machined components for precise, repeatable fitment
• Durable powder coat finishes standard across the lineup
• Covers GM A-body, B-body, F-body, G-body, and Ford Mustang platforms
• Direct bolt-in designs for straightforward installation