Collection: UMI Performance

Muscle Car Suspension
UMI Performance
UMI Performance makes chassis and suspension parts for GM muscle car and classic platforms — A-Body, B-Body, F-Body (Camaro and Firebird), G-Body, H-Body, X-Body, W-Body, C10 trucks and S10/S15 — plus the 1979-2014 Ford Mustang, the 2015-and-newer Ford F-150, the Pontiac G8, the fifth- and sixth-generation Camaro and the Cadillac CTS-V. Most arms, bars and brackets are offered in a red or a black powder-coat finish.
Control ArmsK-MembersSway Bars
What We Carry from UMI Performance
Upper and lower control arms, A-arms, trailing arms and torque arms — boxed, tubular and adjustable
Panhard bars, traction bars, tie rod adjusters and bump steer kits
Tubular K-members, transmission crossmembers and subframe connectors
Front and rear sway bars, sway bar brackets and end links
Lowering springs, coilover conversion brackets, shocks and spring kits
Engine mounts, differential bushings, ball joints and driveshaft safety loops
Confirm your vehicle's body platform, engine and transmission before ordering. Each listing names the UMI part number and finish, and the Fits These Vehicles list on the product page gives the exact years and models.
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Vendor:UMI Performance
UMI Performance 90064 Spring Spacer Kit
✕ Out of StockRegular price $ 41.08Regular price$ 45.19Sale price $ 41.08Sold out -
Vendor:UMI Performance
UMI Performance 90063 Spring Spacer 3/16in
✓ In Stock • Ships from manufacturerRegular price $ 13.51Regular price$ 14.87Sale price $ 13.51Sale -
Vendor:UMI Performance
UMI Performance 4049R Factory Height Springs Rear for 1967-1972 GM A-Body
✕ Out of StockRegular price $ 189.99Regular price$ 208.99Sale price $ 189.99Sold out -
Vendor:UMI Performance
UMI Performance 2661 Extended Coilover Mount Front for 1970-1981 GM F-Body
✓ In Stock • Ships from manufacturerRegular price $ 229.99Regular price$ 252.99Sale price $ 229.99Sale -
Vendor:UMI Performance
UMI Performance 2060-1 Bump Steer Adjuster Kit Race for 1993-2002 GM F-Body
✓ In Stock • Ships from manufacturerRegular price $ 299.99Regular price$ 329.99Sale price $ 299.99Sale -
Vendor:UMI Performance
UMI Performance 3060-1 Bump Steer Adjuster Kit Heavy Duty for 1978-1988 G-Body
✓ In Stock • Ships from manufacturerRegular price $ 171.33Regular price$ 188.47Sale price $ 171.33Sale -
Vendor:UMI Performance
UMI Performance 4061 Bump Steer Adjuster Kit for 1964-1970 GM A-Body
✓ In Stock • Ships from manufacturerRegular price $ 171.33Regular price$ 188.47Sale price $ 171.33Sale -
Vendor:UMI Performance
UMI Performance 4060-1 Bump Steer Adjuster Kit for 1971-1972 GM A-Body
✓ In Stock • Ships from manufacturerRegular price $ 171.33Regular price$ 188.47Sale price $ 171.33Sale -
Vendor:UMI Performance
UMI Performance 4060 Bump Steer Adjuster Kit for 1971-1972 GM A-Body
✓ In Stock • Ships from manufacturerRegular price $ 171.33Regular price$ 188.47Sale price $ 171.33Sale -
Vendor:UMI Performance
UMI Performance 3060 Bump Steer Adjuster Kit for 1978-1988 G-Body
✕ Out of StockRegular price $ 171.33Regular price$ 188.47Sale price $ 171.33Sold out -
Vendor:UMI Performance
UMI Performance 2660-1 Bump Steer Adjuster Kit Race for 1972-1981 GM F-Body
✓ In Stock • Ships from manufacturerRegular price $ 171.33Regular price$ 188.47Sale price $ 171.33Sale -
Vendor:UMI Performance
UMI Performance 2060 Bump Steer Adjuster Kit for 1993-2002 GM F-Body
✓ In Stock • Ships from manufacturerRegular price $ 299.99Regular price$ 329.99Sale price $ 299.99Sale -
Vendor:UMI Performance
UMI Performance 101-10016 1/2in Taller Premium Ball Joint for 1964-1972 A-Body
✓ In Stock • Ships from manufacturerRegular price $ 86.48Regular price$ 95.13Sale price $ 86.48Sale -
Vendor:UMI Performance
UMI Performance 101-10015 Standard Premium Ball Joint for 1964-1972 GM A-Body
✓ In Stock • Ships from manufacturerRegular price $ 48.97Regular price$ 53.87Sale price $ 48.97Sale -
Vendor:UMI Performance
UMI Performance 101-10065 Premium Front Upper Ball Joint for 1993-2002 GM F-Body
✓ In Stock • Ships from manufacturerRegular price $ 75.54Regular price$ 83.10Sale price $ 75.54Sale -
Vendor:UMI Performance
UMI Performance 101-10020 1/2in Taller Premium Ball Joint for 1978-1988 G-Body
✓ In Stock • Ships from manufacturerRegular price $ 102.89Regular price$ 113.18Sale price $ 102.89Sale