Availability
UMI Performance front sway bars are designed to reduce body roll and under-steer and increase corning capabilities, resulting in a more balanced suspension. These front sway bars are more rigid than the factory originals and will bolt directly in place with no modifications. Each kit includes new Energy Suspension end links and greaseable sway bar bushings with new zinc plated clamshells. Nearly two dozen models are available for vehicles from 1963 and up; order the sway bar recommended for your application.
( 97 )
$259.99
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$299.99
UMI Performance solid rear sway bars are designed to reduce body roll and under-steer and increase corning capabilities, resulting in a more balanced suspension. UMI Performance solid rear sway bars also are excellent at keeping your vehicle level and straight during those hard launches. These sway bars are manufactured from 1 in. solid high-carbon steel that's heat-treated and formed as one piece to ensure maximum strength and performance.
( 113 )
$169.99
UMI Performance sway bars are designed to reduce body roll and understeer and increase cornering capabilities, resulting in a more balanced suspension. The front sway bar is more rigid than the factory model and comes complete with new polyurethane end links and greaseable sway bar bushings. The rear sway bar is supplied with new Grade 8 mounting hardware and locknuts. UMI Performance sway bars are manufactured from 4140 chromoly steel—and formed as one piece to ensure maximum strength and performance. Each rear sway bar is heat-treated and heat-formed to maintain longer memory than a cold bent bar, while the front sway bar is CNC-bent for a precise and accurate fit every time. Order the kit recommended for your vehicle.
( 70 )
$396.47
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$419.99
Swapping an LS engine into a classic GM A-body is nothing new. UMI Performance LSX engine mounts allow the installation of an LS engine directly into your A-body. By retaining the proper angle of the engine, you keep your pinion angles/drivetrain operating smoothly. This is a good reason to get pre-engineered mounts for the swap instead of trying to make something work. These mounts place the engine in the factory location, but also give you the ability to relocate the engine rearward up to 3/4 in. or forward 1/4 in. UMI's LS engine mounts will bolt directly to your car's frame and the LS block without modifications. Their brackets have greasable polyurethane mounts to dampen vibration, but still provide a solid feel and eliminate the need for additional modification when using the LS1 oil pan. New premium mounting hardware is also included. Getting a quality set of mounts designed for your application will definitely make the swap a lot easier
( 17 )
$189.99
UMI Performance bolt-in Viking rear coilover kits allow full ride height, spring rate, and damping adjustability. The double shear upper mount is a direct bolt-in and holds a true 2.5 in. diameter coilover spring. The FEA designed lower bracket bolts in using the standard shock mounting hole as well as an additional reinforcement hole. Drilling one 3/8 in. hole per side is required to complete installation. The coilover kits utilize Viking shocks that are 19-way adjustable in both compression and rebound to ensure the perfect setting for every application. Viking shocks are fully rebuildable. The 2.5 in. diameter coilover springs are available in 14 in. long, 110 lb. spring rate for drag use; 14 in. long, 125 lb. spring rate for street use; and 12 in. long, 150 lb. spring rate for autocross and road race applications. The coilover kits have been tested with 1.5 in. diameter UMI trailing arms, as well as UMI's 22mm sway bar and 32mm drag anti-roll bar. Fitment with other brand sway bars and larger diameter control arms is not guaranteed. Please contact UMI for additional information regarding fitment. Key features: * Brackets manufactured entirely from 3/16 in. mild steel * Laser-cut brackets for consistency and a precise fit * TIG-welded for superior strength and clean looks * Powdercoated brackets for a long lasting finish * Viking double-adjustable shocks offer 19 compression and 19 rebound adjustments * 3 spring rate options, depending upon application * Bolt-in design * No welding required * Spacers included for use with control arm relocation brackets
( 9 )
$1,069.99
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$1,805.99
Lower your car properly with UMI Performance lowering springs. The front springs are wound from 5160 chrome silicon wire, while the rear springs are made from 9254 chrome silicon. The linear spring rates of each provide a firm but comfortable ride with exceptional handling. Suitable for Pro-Tour, Autocross, and general cruising, these lowering springs are finished with a tough black powdercoat and are available for the front, rear, or in kits with both. Order the parts designed for fitment with your vehicle's suspension. Not all springs are alike—the proof is UMI Performance lowering springs.
( 134 )
$149.99
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$319.99
The suspension's job is to ensure that your vehicle stays as level and smooth as possible. UMI Performance front bump steer adjuster kits are designed to improve handling and straight line stability by decreasing or eliminating toe change during suspension travel. These simple bolt-on kits allow you to relocate the outer tie rod end, with no spindle drilling required. The 6061 T-6 aluminum hex is hard black anodized for corrosion protection and lightweight strength. Included in the kits are race-quality rod ends, jam nuts, spacers, and locking hardware.
( 12 )
$169.99
UMI Performance Stage 2.5 handling kits bring you the best of both worlds—combining UMI's Stage 2 handling kit with four-corner Viking coilover ride height adjustability. These Stage 2.5 handling kits feature UMI's most popular combination of front and rear springs, along with all the necessary components and hardware needed to transform your GM vehicle for improved handling, ride quality, and an impressive stance. Ride height is adjustable from stock to 2 in. below stock ride height, and the Viking shocks feature 19 settings in both compression and rebound. More than a dozen kits are available, with numerous options. Select the model recommended for your vehicle. Stage 2.5 handling kits include: * Tubular lower front A-arms with polyurethane bushings * Upper front A-arms with Delrin© bushings * Viking coilover kit * Heavy-duty front sway bar with new bushings and end-links * Front upper and lower race-quality hardware kit * Solid heat-treated rear sway bar * Tubular rear lower control arms with polyurethane bushings * Tubular rear upper control arms with polyurethane bushings * Tubular frame braces with hardware * Replacement rear-end housing bushings * Rear control arm race-quality hardware kit * UMI bolt-on rear coilover kit * Thrust bearing kit (x 2) * Spanner wrench kit Note: Rear coilover kit fits GM axle housing only. Aftermarket axle housing fitment is not guaranteed.
Not Yet Reviewed
$4,369.99
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$4,649.99
UMI Performance adjustable upper control arms feature CNC-machined 0.250 in. mild steel, 4140 chromoly threaded tube adapters, and a high-strength, 4140 chromoly, heat-treated, 1.000 in. solid adjuster. With UMI Performance adjustable upper control arms, you can easily make pinion angle adjustments in the garage or at the track--it's as simple as loosening two nuts! Simply turn UMI's unique chromoly on-car adjuster with the control arms on the car to quickly lengthen or shorten the control arms. Pinion angle adjustments are a must when wanting to lower your track 60 ft. times, increase traction, and reduce unwanted wheel hop. Their PTFE-lined spherical rod end design allows for "bind-free" operation, making them great upgrades for both your track and autocross-driven vehicle. Additional features include: * On-car adjustability * 3/4 in. hard chrome plated PTFE/KEVLAR® self-lubricating race rod ends * Precision CNC-machined and fully welded * CNC-machined 6061 aluminum step bushings * Durable powdercoated finish
( 67 )
$249.99
UMI Performance double adjustable lower control arms feature 100 percent TIG-welded fabrication using drawn-over mandrel tubing. UMI Performance double adjustable lower control arms also have spherical bearing rod ends, which offer "bind-free" operation by letting the suspension articulate correctly when high handling is a concern. These control arms also work great as solid bushing drag race control arms with easy, built-in adjustment. Quick and easy on-car adjustments can be made, if needed, with a simple turn of the wrench. When you are looking for maximum performance from your vehicle, you can't go wrong with this setup. Additional features include: * 1.250 in. x 0.120 in. steel or chromoly tubing * 4140 chromoly threaded tube adapters * 3/4 in. hard chrome plated, PTFE/KEVLAR® self-lubricating race rod ends * CNC-machined 6061 aluminum step bushings * On-car adjustability using right and left hand threads * Durable powdercoated finish
( 13 )
$399.99
UMI Performance bolt-in Viking front coilover kits offer a true 2 1/2 in. racing coilover setup for your ride. UMI's Viking Worrier shocks are double adjustable and easily change from street use to high rebound force for race use. By increasing the rebound force, you can eliminate pitch and roll while making the car stay flat during transitions. Viking Worrier shocks offer a wide range of compression dampening and can be dialed in from a comfortable cruise setting all the way up to full race settings. The kits are available with different spring rates; order the kit designed to fit your vehicle. Additional details: * Viking shocks use upper/lower bearings, eliminating polyurethane and rubber, for crisp response and great reliability * Adjustable compression * Adjustable high rebound Worrier AT valving * CNC laser-cut brackets with black powdercoat finish offer precision fit * Direct bolt-in with no welding, minor trimming required
( 6 )
$764.99
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$789.99
The GM 4-link suspension has many things going for it, but modern ingenuity and materials have made for some exceptional replacement parts—such as UMI Performance Roto-Joint rear-end housing bushings. These bushings allow full articulation of GM's rear 4-link suspension when they're used in conjunction with rod ends or Roto-Joints in the other six locations. A gentle press fit is all that's needed for installation, and a spiral retaining ring keeps them in place. Pre-greased 6061 T-6 aluminum housings use Synco Super Lube to deliver smooth action for many years. Whether you use your vehicle for road racing, corner hugging, or Sunday driving, you'll feel safe in knowing your rear suspension will fully articulate with UMI Performance Roto-Joint rear-end housing bushings.
( 7 )
$169.99
Decrease engine movement by replacing your factory rubber motor mounts with a set of these heavy-duty engine mounts from UMI Performance. These solid motor mounts bolt to the frame of various GM F-Body, GM G-Body and several 1974 and up GM V8 vehicles. Each steel plate mount is CNC laser cut for exact tolerances, then is fully MIG-welded and given a black powdercoat finish for long-lasting service. These mounts include Grade 8 mounting hardware.
( 15 )
$49.99
UMI Performance rear axle flip kits provide a cost effective way to drop the rear of your square-body truck 6 in. by relocating axle above the leaf springs. Designed for trucks equipped with 8.5 in 10-bolt axles, they include everything needed to do the job, including polyurethane bump stops. Constructed from steel and black powdercoated, the saddle brackets move the axle towards the back to keep the wheel centered in the wheel well, and the lower leaf plates feature laser-cut 1/4 in. steel clamped by heavy-duty U-bolts. Kit components include: * Two axle flip brackets * Two lower leaf mounting plates * Four 5/8 in. zinc plated U-bolts * Eight 5/8 in. hardened washers * Eight 5/8 in.-18 in. tall hex nuts * Two pancake bump stops * Two 3/8 in.-16 in. hex nuts * Two 3/8 in. lock washers
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$149.99
UMI Performance rear-end housing bushings will allow for the replacement of your rubber OEM bushings. UMI Performance rear-end housing polyurethane bushings replace the two upper control arm rear-end differential bushings (the bushings that stay attached to the rear-end). This will eliminate the dry rot and cracked and hardened bushings that will decrease your ride quality and performance. They are excellent upgrades for your street or track-driven vehicle.
( 64 )
$49.99
UMI Performance lightweight, 1 in. diameter tubular rear sway bars are CNC-bent and feature a UMI tried and true CNC-machined clamping system that allows for differential housing mounting on different diameter housings. Their chassis and differential housing mounts reduce the bind normally associated with factory-style bars. They are bolt-on but may be welded for added security. Plus, the house-made hex adjuster allows for preloading of the bar when used for drag racing, so that you launch straight. Whether you're into street, auto-x, road racing, or drag racing, UMI Performance tubular rear sway bars offer the craftsmanship and performance you want for your vehicle. Features include: * Designed to clear all rear-ends--10-bolt, 12-bolt, 9 in., M9, S60, and others * Heavy-duty, race-style chromoly spherical rod ends with PTFE race * High-strength 4140 chromoly zinc plated U-bolts * CNC-machined sway bar mounts with grip teeth and reinforcement gussets * 1 in. billet steel hex adjuster for extreme strength * Premium greasable polyurethane bushings * Durable, long-lasting powdercoat
( 9 )
$519.99
UMI Performance tie rod adjusting sleeves have heavy-duty tie rod adjusters to eliminate the factory clamp-style design, making adjustments easy and hassle-free, while enhancing steering. UMI Performance tie rod adjusting sleeves are CNC-machined from 6061 aluminum hex, feature left and right hand threads for easy on-car adjustments, and are finished in a durable black anodized coating. These tie rod adjusters work with the factory tie rod ends with no modifications.
( 25 )
$59.99
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$74.99
UMI Performance suspension lowering kits are designed to give your ride a lowered stance, with improved handling and control. Packaged with shocks and/or struts and springs, UMI utilizes premium CrSi wire wound into different spring rates to fit various applications for daily driving, street cruising, carving corners, and even light racing use. You can provide your vehicle with a different attitude and performance using a UMI suspension lowering kit.
( 1 )
$665.99
UMI Performance lift bars replace your stock rear control arms, adding tremendous track gains, while not affecting ride height and keeping ride quality at its best. These lift bars are designed to work with axle torque to load the chassis of the car, forcing the rear wheels downward, while pushing the tires into the ground for harder launches and improved 60 ft. times. These bars are designed to greatly improve traction and reduce unwanted wheel hop. Constructed from boxed mild steel tubing, they feature a 0.120 in. wall and 0.188 in. thick mounting plates and are completely CNC-machined for exact tolerances and a superb fit. These lift bars feature greasable Energy Suspension bushings that reduce bushing deflection but still make these arms 100 percent streetable. Each lift bar features the correct provisions for adding a stock or aftermarket sway bar. Sway bar holes are placed in the correct pattern to maintain the sway bar level with the rear-end. All sway bar holes are reinforced with a 0.120 in. thick steel sleeve wall, TIG-welded, and then sanded into place. The rear mounting brackets feature two settings that allow the lift bar to be lowered 2 in. or 3 in., depending upon user preference and the vehicle's suspension setup. These lift bars also correct lost geometry and instant center on a lowered vehicle. Add a set of our adjustable upper control arms for maximum rear suspension setup!
( 3 )
$479.99
Wondering how to retain factory shock absorbers on the lowered rear-end of your square-body truck? UMI Performance shock relocation kits provide the optimal solution. They include all the necessary hardware and feature a gloss black powdercoat finish. Go with a proven mounting solution for stock-length absorbers with the UMI shock relocation kit designed for your flip kit-lowered vehicle.
( 2 )
$79.99
Good vehicle handling starts with proper shock absorber installation. UMI Performance shock installation hardware kits include all the parts you need for correct fitting of your Viking or AFCO shocks. Order the UMI Performance shock installation hardware kit designed to fit your vehicle.
( 5 )
$11.99
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$15.99
UMI Performance rear adjustable upper and non-adjustable lower control arms are direct replacements for the OEM setup. They add strength, ride improvement, and most importantly, rear-end adjustment. UMI Performance rear adjustable upper control arms are constructed from aircraft-quality 4140 chromoly steel and feature TIG-welded construction. The upper control arm mounting points feature CNC-machined 0.250 in. mild steel, 4140 chromoly tube adapters, and a high-strength, 4140 chromoly, heat-treated, 1.000 in. solid adjuster. UMI Performance rear lower control arms feature CNC-machined 0.120 in. wall thickness mild steel tubing, fully TIG-welded construction, greasable polyurethane bushings, and Zerk grease fittings. Additional features include: * On-car adjustability * 4140 chromoly threaded tube adapters * 3/4 in. hard chrome plated PTFE/KEVLAR® self-lubricating race rod ends * CNC-machined 6061 aluminum step bushings * Durable powdercoated finish
( 17 )
$869.99
UMI Performance replacement control arm bolt kits include all-new hardware for installing upper or lower rear control arms on your vehicle. UMI Performance replacement control arm bolts are Grade 8 bolts and are zinc plated.
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$15.99
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$27.99
UMI Performance adjustable front-end links directly replace the factory non-adjustable front sway bar end links. Adjustable end links allow you to adjust front sway bar preload and tune the front suspension. The sway bar end links are CNC-machined from 6061 T-6 aluminum for the utmost in strength and anodized black for long-lasting corrosion protection. Adjustments are made using the QA1 XM Series spherical rod end bearings, which prevent bind and allow the suspension to articulate correctly. The QA1 rod ends feature oil-impregnated PTFE lining which keeps the ball bearing lubricated at all times—allowing for quiet longevity. The adjustment of the sway bar end links are easily made on the car using right and left hand threads, and using the hex body as a turnbuckle.
( 3 )
$39.99
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