UMI’s Stage 1 handling kit is perfect for the G-Body owner who wants a simple and effective suspension upgrade with real handling improvement. This kit includes our classic 1.250” front sway bar and 1” rear sway bar combined with UMI high performance lowering springs and Bilstein shocks. The sway bars reduce body roll and provide a nice balance when handling at the limit. Our lowering springs feature medium stiffness to control body movement and reduce floating while still providing a comfortable ride. Bilstein gas charged shocks control the springs and sway bars effectively for a crisp yet comfortable ride. Choose UMI’s Stage 1 as a 1st step to transforming your G-Body into a capable daily driver or corner carver. Made In USA.
UMI’s Stage 1 Handling Kit Includes:
- 3035 – Heavy duty 1-1/4” CrMo front sway bar with new bushings & endlinks.
- 3034 – Solid 1” heat treated CrMo rear sway bar.
- Choice of 3050 – 1″ lowering springs, 600lb/in linear front, 130lb/in linear rear OR 3051 – 2″ lowering springs, 600lb/in linear front, 130lb/in linear rear.
- Bilstein gas charged shocks.
UMI’s Stage 1.5 kit is the simple way to dramatically improve the handling and performance of your muscle car. We start with our original Stage 1 kit and take it to the next level by adding Koni off-car rebound adjustable shocks. The Stage 1.5 kit also tunes up the camber curve by including ½” taller than stock upper ball joints that easily bolt to factory and most aftermarket a-arms. High performance lowering springs feature medium stiffness to control body movement and reduce floating while still providing a comfortable, sporty ride. Stage 1.5 balances out with our tried and true 1.250” front sway bar and 1” rear sway bars reducing body roll and providing excellent chassis balance when handling at the limit. Every component in this kit, as with all UMI products, is Made in USA.
Spring notes: Springs are intended for the Chevrolet small block engine. Lightweight LS may require trimming. An additional 1/4″ front end drop may occur with a full weight big block. Springs are designed to sit level, however due to varying weights and preferences, occasional trimming may be required.
Features:
- Suitable for corner carving, auto-x and road racing while still being street friendly.
- 1-1/4” CrMo front and 1” heat treated rear sway bars help control body roll.
- 600lb/in linear front, 130lb/in linear rear lowering springs ensure crisp handling and a sporty ride
- ½” taller than stock upper ball joint to improve camber curve.
- Koni off-car rebound adjustable shocks.
- Stage 1.5 can be upgraded to Stage 2 or 3 without duplicating parts.
UMI’s Stage 2 handling kit includes everything to upgrade and rebuild the suspension on your classic 1978-1988 GM G-Body. The Stage 2 kit includes upper and lower A-Arms with 1/2″ taller upper ball joints, heavy duty UMI sway bars with new end links and greaseable bushings, Bilstein shocks, premium lowering springs, rear tubular upper and lower control arms, replacement rear end housing bushings and heavy duty tubular frame braces. We also include all new Grade 10.9 hardware with locking nuts to complete the installation. This kit will make any classic cruiser feel like a modern day muscle car! UMI’s Stage 2 may be our entry level complete kit but it isn’t entry level performance or entry level quality. Perfect for the weekend warrior looking to go for a back road cruise, perhaps hit the drag strip or even an auto-x. As with all UMI Performance products, this kit is 100% Made In USA. Available in red or black powder coat. Bilstein shocks are yellow/blue.
Spring notes: Springs are intended for the Chevrolet small block engine. Lightweight LS may require trimming. An additional 1/4″ front end drop may occur with a full weight big block. Springs are designed to sit level, however due to varying weights and preferences, occasional trimming may be required.
UMI’s Stage 2 Handling Kit Includes:
- 3031 – Tubular lower a-arms with polyurethane bushings.
- 3033-1 – Upper a-arms with Delrin bushings, +1/2″ tall ball joints.
- 3035 – Heavy duty 1-1/4” front sway bar with new bushings & endlinks.
- 3034 – Solid 1” heat treated rear sway bar.
- 3015 – Tubular rear lower control arms with polyurethane bushings.
- 3016 – Tubular rear upper control arms with polyurethane bushings.
- 3028 – Tubular frame braces with hardware.
- 3000 – Replacement rear end housing bushings.
- 3013 – Front upper & lower Grade 8 hardware kit.
- 3001 – Rear control arm Grade 8 hardware kit.
- 3050 or 3051 – 1″ or 2″ lowering springs, 600lb/in front, 130lb/in rear
- Bilstein shocks.
UMI Performance brings the best of both worlds together by combining our Stage 2 handling kit with four corner Viking coilover ride height adjustability. The kit includes caster corrected upper and lower a-arms loaded with 1/2″ taller upper ball joints, heavy duty UMI sway bars with new end links and greaseable bushings, rear tubular upper and lower control arms, replacement rear end housing bushings, heavy duty tubular frame braces, plus all necessary hardware. Ride height is adjustable from stock to 2″ below stock ride height. The Viking shocks feature 19 settings in both compression and rebound. Kit features our most popular combination of 450lb/in front and 125 lb/in rear springs. 100% Made In USA.
UMI’s Stage 2 Handling Kit Includes:
- 3031 – Tubular lower front a-arms with polyurethane bushings.
- 3033-1 – Upper front a-arms with Delrin bushings, tall ball joints.
- A204-450R – Viking coilover kit.
- 3035 – Heavy duty 1-1/4” front sway bar with new bushings & endlinks.
- 3013 – Front upper & lower race quality hardware kit.
- 3034 – Solid 1” heat treated rear sway bar.
- 3015 – Tubular rear lower control arms with polyurethane bushings.
- 3016 – Tubular rear upper control arms with polyurethane bushings.
- 3028 – Tubular frame braces with hardware.
- 3000 – Replacement rear end housing bushings.
- 3001 – Rear control arm race quality hardware kit.
- 3049-125 – UMI bolt-on rear coilover kit.
- 7917-101 Thrust Bearing Kit x 2
- 7995-101 Spanner wrench kit
Note: Rear coilover kit fits GM axle housing only. Aftermarket axle housing fitment is not guaranteed. If you are running a Quick Performance 9″ rearend you can call in to our sales department to have the brackets switched out to our new 3054 part number.
UMI’s Stage 3 kit is designed to achieve great street manners combined with Pro-Touring handling capability. Up front you’ll find Delrin lower a-arm bushings for precise steering along with ½” taller upper ball joints to plant that tires contact patch. Out back we include our popular Roto-Joints and an adjustable length upper control arm so the axle can articulate nicely after you’ve perfected the driveline angle. Sway bars are UMI’s tried and true 1-1/4” front and 1” rear for a great front to rear handling balance. The Bilstein B6 Performance gas-charged shocks complete the package. The Stage 3 kit is available in beautiful red or black powder coat and is 100% designed, tested, manufactured and raced out of our shop in Philipsburg, PA – USA.
Spring notes: Springs are intended for the Chevrolet small block engine. Lightweight LS may require trimming. An additional 1/4″ front end drop may occur with a full weight big block. Springs are designed to sit level, however due to varying weights and preferences, occasional trimming may be required.
Features and benefits:
- Increased spindle height by 1/2” via tall upper ball joints for improved camber gain and a better contact patch. Works nicely in conjunction with lowering springs.
- Upper a-arms add caster for improved steering feel and straight line stability.
- Lower a-arms feature UMI-built Delrin bushings and accept standard springs or coilovers.
- 1.250” front sway bar for flat cornering, CNC bent from 4140 balanced with 1” solid heat formed rear sway bar.
- UMI springs feature ultra premium CrSi material with linear rates front and rear for consistent handling. (600 lb/in front, 130 lb/in rear)..
- Rear trailing arms feature Poly and Roto-Joints as well as adjustable uppers for setting pinion angle and rear lateral location.
- Roto-Joints allow smooth articulation for improved handling and less bind.
- Bilstein B6 Performance shocks tuned, and tested to provide superior control, precise handling, increased traction, and enhanced stability—without sacrificing comfort
UMI’s Stage 3 Handling Kit Includes:
- 3032 – Tubular lower a-arms with Delrin bushings.
- 3033-1 – Tubular upper a-arms with Delrin bushings & ½” taller ball joints.
- 3035 – Heavy duty 1-1/4” front sway bar with new bushings & endlinks.
- 3034 – Solid 1” heat treated rear sway bar.
- 3038 – Tubular rear lower control arms with Roto-Joint.
- 3037 – Adjustable rear upper control arms with Roto-Joints.
- 3028 – Tubular frame braces with hardware.
- 3000 – Replacement rear end housing bushings.
- 3013 – Front upper & lower Grade 8 hardware kit.
- 3001 – Rear control arm Grade 8 hardware kit.
- Front & Rear Bilstein gas-charged shocks
- Choice of 3050 – 1″ lowering springs, 600lb/in front and 130lb/in rear OR 3051 – 2″ lowering springs, 600lb/in front and 130lb/in rear.
UMI’s Stage 3.5 kit is designed to transform your GM G-Body from a grandma cruiser to a capable corner carver. UMI’s lowe
