Fits: 1968-972 Chevelle, Malibu, Skylark, Monte Carlo, Lemans, F85, Buick Special, Sport Wagon, Vista Cruiser, Tempest, ElCamino, Lemans, Grand Prix, GTO, Olds 442, Buick GS, and Cutlass
 
 
Description:
UMI Performance brings the best of both worlds together by combining our Stage 2 handling kit with four corner 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 1″-3″ below stock and the Viking shocks feature 19 settings in both compression and rebound. 100% Made In USA.
 
***This kit is for lowering your car 1-3″ below factory. Contact support@umiperformance.com if planning stock or raised ride height. No refunds if you choose the base kit with lowered ride height then want your car to be tall”
 
***UMI 4057 IS DIRECT BOLT-ON ONLY WHEN USED WITH A GM AXLE HOUSING AND STOCK GM BRACKETS. AFTERMARKET HOUSINGS VARY WIDELY IN DESIGN AND LAYOUT, WHICH MEANS THE 4057 BRACKET WILL NOT BOLT ON. EMAIL SUPPORT@UMIPERFORMANCE.COM BEFORE ORDERING FOR AN AFTERMARKET AXLE***
 
Front Spring Rates: Choose 450lb spring rate for SBC and LS cruise or 550lb spring rate for SBC/LS handling and all big blocks
 
Rear Spring Rates:
The 175 lbs spring rate is great for the street and light track use. It will give you a more comfortable ride on the street, but will allow more body roll than the 225 lbs spring rate. The 225 lbs spring rate will create a stiffer ride with less body roll and is intended for track inspired cars. 
 
Includes:
4031 Tubular lower front a-arms with polyurethane bushings
4033-1 Upper front a-arms with Delrin bushings, tall ball joints
4035 Heavy duty 1-1/4” front sway bar with new bushings & endlinks
4004 Front upper & lower Grade 8 hardware kit
A204-450S/550S Coilover kit
7917-101 Thrust Bearing Kit x 2
7995-102 Spanner wrench kit
4034 Solid 1” heat treated rear sway bar
4015 Tubular rear lower control arms with polyurethane bushings
4016 Tubular rear upper control arms with polyurethane bushings
4028 Tubular frame braces with hardware
3000 Replacement rear end housing bushings
4001 Rear control arm Grade 8 hardware kit
4057 Rear coilover kit
 
Installation Notes: Rear shocks may not clear all exhaust tail pipes. UMI is not responsible for exhaust clearance issues. Brackets are designed to fit factory GM axle housings only. The brackets are not guaranteed to fit aftermarket housings due to the variety of trailing arm mounts available.