UMI’s Stage 3.5 kit is designed to transform your GM A-Body from a comfortable cruiser to a capable corner carver with the twist of the wrist. UMI’s lowering springs form the handling foundation and are controlled by UMI’s premium rebound adjustable shocks. Our ultra-premium springs feature carefully tuned rates and high quality construction to eliminate the floating feeling and will tie your A-body directly to the road. The UMI monotube shocks rebound adjustment allows you to fine tune your ride whether you’re doing back road heroics or shaving that last tenth of a second between the cones. UMI a-arms feature tubular construction, Delrin bushings for precise steering and caster corrected uppers. The ½” taller upper ball joints work with the lowering springs to tune up the poor factory A-body camber curve. Out back the UMI trailing arms feature Roto-Joints for smooth articulation combined with poly bushings for a smooth ride. Adjustable uppers allow for pinion angle tuning while the axle mounted pro-tour bar performs on the street, during cornering and even the occasional dragstrip blast. The entire package is designed and manufactured by UMI in Philipsburg, PA – USA of US materials and we’re proud to drive on and race what we build.
- Rear trailing arms feature Poly and Roto-Joints with adjustable uppers for setting pinion angle and rear lateral location
- UMI 1" lowering springs featuring ultra-premium CrSi material with linear rates front and rear
- Increased spindle height by 1/2” via tall upper ball joints for improved camber gain
- Lower a-arms feature UMI-built Delrin bushings, premium ball joints, and bump stops
- Upper a-arms add caster for improved steering feel and straight line stability
- Roto-Joints allow smooth articulation for improved handling and less bind
- 1” diameter rear Pro-Tour sway bar offers tunable rear roll resistance
- 1-1/4” front sway bar for flat cornering, CNC bent from 4140
- Koni off-car rebound adjustable shocks
- Made in USA
