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UMI Performance Suspension Parts
Give your classic musclecar modern handling with UMI Performance! Built using the very latest design and machining technology, UMI Performance also installs and tests...
Give your classic musclecar modern handling with UMI Performance! Built using the very latest design and machining technology, UMI Performance also installs and tests every chassis and suspension component it makes to ensure that they perform as designed. UMI focuses on musclecars from the 1960s to today—A-bodies, F-bodies, B-bodies, G-bodies, and Mustangs. Choose from components like crossmembers, panhard bars, control arms, K-members, subframe connectors, and more. Many components fit like stock replacements, so they’re easy to install, but you’ll immediately notice tighter handling that’s easy to tune to your needs.
Give your classic musclecar modern handling with UMI Performance! Built using the very latest design and machining technology, UMI Performance also installs and tests every chassis and suspension component it makes to ensure that they perform as designed. UMI focuses on musclecars from the 1960s to today—A-bodies, F-bodies, B-bodies, G-bodies, and Mustangs. Choose from components like crossmembers, panhard bars, control arms, K-members, subframe connectors, and more. Many components fit like stock replacements, so they’re easy to install, but you’ll immediately notice tighter handling that’s easy to tune to your needs.
Showing In Stock Items. Show All 102 Items.
UMI Performance Adjustable Sway Bar End Links
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.
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$39.99
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$199.99
UMI Performance Complete Front End Kit
UMI Performance complete front-end kits offer improved handling and great value. These non-adjustable upper and lower A-arm kits not only save you dollars, but weight on your front-end, while adding strength, better ride quality, and reduced bushing deflection. Built from strong DOM tubing, the fully assembled and ready-to-install A-arms have CNC-machined upper and lower ball joint holders and 4140 chromoly cross shafts. UMI upper A-arms feature greaseable Delrin® bushings, and the lower A-arms are supplied with new lower ball joints installed, polyurethane bushings, and sway bar mounting provisions. These UMI kits are designed to work with factory springs and lowering springs mounted in the factory location. The A-arms are given a durable and brilliant powdercoat finish. Order the complete front-end kit designed to fit your vehicle.
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$1,283.83
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$1,489.99
UMI Performance Competition Front End Kits
Tremendous front grip and a host of features can be yours with UMI Performance Competition front-end kits. The included A-arm kit enables 10 degrees caster while maintaining standard track width and wheelbase. Lower A-arms are assembled with tall lower ball joints to optimize roll center, camber gain, and center of gravity. Lower A-arms feature Delrin bushings for smooth travel and bind-free performance. The new lower A-arm works in conjunction with the included adjustable upper arm—which features minimum shim adjustability, Pro Forged ball joints, and super-smooth PTFE lined rod ends. The front sway bar attaches using UMI's swivel-style end link design and double shear mounting system. The included Viking Crusader coilover shocks mount to the lower A-arm in double shear quick-change brackets. The lower shock mount is removable to allow spring and shock changes at the track. UMI's kit features Viking Crusader shocks with AT pro-touring valving (high rebound tie-down for road race and autocross) and a true 2.5 in. racing coilover. The upper stud mount fits in the factory location, while the lower is optimized to fit UMI's 3057-1 coilover lower A-arm. Some grinding is required for installation in the upper frame spring bucket. Other spring rates and valve codes are available. The Competition kits have been battle-tested on the iconic UMI Green Machine. Kits are available in red or black powdercoat; and are 100 percent designed, manufactured, and raced with pride in the USA.
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$2,289.99
UMI Performance 1998-2002 F-Body LS1 Front End Kits (Drag, Stage 1)
UMI Performance 1998-2002 F-Body LS1 Stage 1 front-end kits are the ideal starting point for reducing front-end weight and enhancing weight transfer in your 4th Gen vehicle. The dual tube K-member is renowned for its strength and durability, capable of withstanding wheel stand landings and street abuse while also decreasing weight and protecting the oil pan. The rod end lower A-arms minimize friction, allowing the car to respond quickly off the line, and reduce weight by 8 lbs. UMI's K-member and A-arms are made from robust DOM tubing, precision-bent, CNC-notched, and welded in a jig for a solid foundation. The included K-member is compatible with factory motor mounts, polyurethane motor mounts, or UMI's solid billet aluminum motor mounts (P/N 2323). Whether you want to decrease front-end weight, improve engine clearance, or enhance your street/strip car, the Stage 1 package is a great starting point. UMI's Stage 1 kit includes the following: * Tubular dual tube K-member * Tubular lower A-arms with race quality rod ends * Grade 10.9 hardware with Ny-lock nuts Product features: * Heavy-duty K-member with dual tube construction * Tubular lower A-arms with race quality rod ends * Premium ball joints installed * 33 lbs. of front-end weight savings * Chromoly A-arms save an additional 1 1/2 lbs. * Works with factory steering rack * Direct bolt in replacement, no welding * Includes new grade 10.9 A-arm mounting hardware
Not Yet Reviewed
$1,449.99
UMI Performance Panhard Bar Adjustable Bushing Ends
UMI Performance panhard bar adjustable bushing ends are designed to replace spherical rod ends on UMI panhard bars for the 1982-2002 Camaro/Firebird and 2005-09 Ford Mustang. They will also work on many other brand panhard bars that utilize a 3/4 in.-16 threaded right-hand rod end. These bushing ends replace 3/4 in.-16 threaded right-hand rod ends by simply removing the rod end and screwing in the polyurethane bushing assembly. The replacements are ideal for swapping out worn rod ends or rod ends making unbearable noise. The bushing holders are an easy replacement and are supplied fully assembled with Energy Suspension fluted bushings, grease fitting, new jam nut, and durable powdercoat. Bushing width is 1.875 in. with 3/4 in.-16 right-hand thread, 0.560 hole diameter and 1.750 in. of thread adjustment. UMI Performance bushing ends feature threads fabricated from 4140 chromoly steel, DOM tubing and TIG-welded for superior strength and thread durability. They're available in black or red.
Not Yet Reviewed
$39.99
UMI Performance Control Arm Adjustable Bushing Ends
UMI Performance control arm adjustable bushing ends are designed to replace spherical rod ends on UMI control arms for the 1964-72 GM A-Body, 1978-88 GM G-Body, and the 1982-2002 Camaro/Firebird. They will also work on many other brand control arms for the above listed vehicles that utilize a 3/4 in.-16 right-hand threaded rod end. These bushing end replacements install simply by removing the rod end and screwing in the polyurethane bushing assembly. The new bushing ends are an ideal upgrade for worn-out rod ends or rod ends making unbearable noise. Bushing holders come supplied fully assembled with Energy Suspension fluted bushings, grease fitting, new jam nut, and durable powdercoat. Bushing width is 2.400 in. with 3/4 in.-16 right-hand thread, 0.500 in. bolt hole diameter, and 1.750 in. of thread adjustment. UMI Performance bushing ends feature threads fabricated from 4140 chromoly steel, DOM tubing and TIG-welded for superior strength and thread durability. They're available in black or red.
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$39.99
UMI Performance 1993-1997 F-Body LT1 Front End Kits (Drag, Stage 3)
UMI Performance 1993-97 F-Body LT1 Stage 3 front-end kits are designed for serious performance enthusiasts. The rod end upper and lower A-arms reduce friction and unsprung weight, enabling quick weight transfer. The dual tube K-member is the strongest in its class, able to withstand wheel stand landings and street abuse while also protecting the oil pan. Made from high-quality DOM tubing, the K-member and A-arms are precision-bent, CNC-notched, and welded in a jig for a solid base. PTFE-lined, race-quality rod ends and premium ball joints ensure durability and performance. The adjustable A-arms offer strength, weight reduction, reduced friction, and alignment adjustments. These bolt-in systems allow for easy caster adjustments for straight-line stability. The Stage 3 kit is the perfect starting point for achieving top performance in drag F-Body cars, often used in single-digit vehicles. UMI's Stage 3 Includes: * Tubular dual tube K-member * Tubular adjustable race lower A-arms with rod ends * Tubular adjustable race upper A-arms with rod ends * Grade 10.9 hardware with Ny-lock nuts Product features: * Heavy-duty K-member with dual tube construction * Tubular upper and lower A-arms with race-quality rod ends * Wide flanged aluminum step bushings assembled in A-arms * Premium upper and lower ball joints installed * 33 lbs. of front-end weight savings * Chromoly A-arms save an additional 1 1/2 lbs. * Works with factory steering rack * Direct bolt-in replacement, no welding
Not Yet Reviewed
$1,929.99
UMI Performance 1998-2002 F-Body LS1 Front End Kits (Street, Stage 2)
UMI Performance 1998-2002 F-Body LS1 Stage 2 front-end kits provide a solid foundation for your street car, making it ideal for drag strip use. They effectively combine weight reduction and strength with performance and comfort. The dual tube K-member is known for its durability, handling rough landings and street abuse while also protecting the oil pan. The lower arms feature poly bushings to absorb road noise, and the non-adjustable uppers guide the suspension on greaseable poly bushings. The A-arms are equipped with premium ball joints and help save an additional 8 lbs. of weight. UMI's K-member and A-arms are constructed from strong DOM tubing, precision-bent, CNC-notched, and welded in a jig for a robust base. Each kit is designed to work with factory motor mounts, polyurethane motor mounts, or UMI's solid billet aluminum motor mounts. They offer a direct bolt-in replacement, reducing front-end weight while maintaining street comfort and enhancing performance. UMI's Stage 2 kit includes: * Tubular dual tube K-member * Tubular street lower A-arms * Tubular street upper A-arms with polyurethane bushings * Grade 10.9 hardware with Ny-lock nuts Product features: * Heavy-duty dual tube construction K-member * Tubular upper and lower A-arms with greaseable polyurethane bushings * Premium upper and lower ball joints installed * 33 lbs. of front-end weight savings * Chromoly A-arms save an additional 1 1/2 lbs. * Compatible with factory steering rack * Includes new grade 10.9 A-arm mounting hardware * Direct bolt-in replacement, no welding required
Not Yet Reviewed
$1,789.99
UMI Performance 1993-1997 F-Body LT1 Front End Kits (Street, Stage 2)
UMI Performance 1993-97 F-Body LT1 Stage 2 front-end kits provide a strong foundation for your street car designed for drag strip use. They offer a balanced combination of weight reduction, strength, performance, and comfort. Known as the strongest in their class, the dual tube K-member can handle wheel stand landings and street abuse while minimizing weight and protecting the oil pan. The lower arms feature poly bushings in the straight strut portion to absorb road noise, while the non-adjustable uppers guide the suspension using greaseable poly bushings. Both upper and lower A-arms are assembled with premium ball joints, saving an additional 8 lbs. UMI's K-member and A-arms are constructed from durable DOM tubing, which is precisely bent, CNC-notched, and welded in a jig to create a solid base. The included K-member is compatible with factory motor mounts, polyurethane motor mounts, or UMI's popular solid billet aluminum motor mounts. Stage 2 kits are a direct bolt-in replacement that removes front-end weight while maintaining street comfort and enhancing performance. UMI's Stage 2 includes: * Tubular dual tube K-member * Tubular street lower A-arms * Tubular street upper A-arms with polyurethane bushings * Grade 10.9 hardware with Ny-lock nuts Product features: * Heavy-duty K-member with dual tube construction * Tubular upper and lower A-arms with greaseable polyurethane bushings * Premium upper and lower ball joints installed * 33 lbs. of front-end weight savings * Chromoly A-arms save an additional 1 1/2 lbs. * Works with factory steering rack * Includes new grade 10.9 A-arm mounting hardware * Direct bolt-in replacement, no welding
Not Yet Reviewed
$1,789.99
UMI Performance Rear-End Housing Replacement Bushings
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.
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$34.99
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$59.99
UMI Performance Roto-Joint Rear-End Housing Bushings
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.
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$169.99
UMI Performance Rear-End Sway Bar Installation Kits
Do you have an aftermarket rear-end and no way to install a rear sway? You can solve the problem by using a rear-end sway bar installation kit from UMI Performance. These kits include bolt-on CNC-machined bushing mounts, heavy-duty zinc plated chromoly U-bolts, and longer polyurethane end links. These kits place the sway bar below the larger center section on aftermarket rear-ends and provide proper clearance. The supplied longer end links provide the proper geometry of the rear sway in its new mounting location. And, believe it or not, these kits will also work to adapt a rear sway bar to vehicles that were not supplied with a sway bar from the factory.
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$129.99
UMI Performance Front Bump Steer Adjuster Kits
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.
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$169.99
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$299.99
UMI Performance Extended Length Lower/Adjustable Upper Control Arm Kits
UMI Performance extended length lower/adjustable upper control arm kits tackles the factory wheelbase problem. The extended-length (5/8 in.) lowers reposition the wheel properly in the wheelhouse, while the extended length rod end-adjustable uppers control pinion angle and lateral location. The kits are available with a durable red or black powdercoat finish. Choose a set designed for your vehicle in the color you prefer.
Not Yet Reviewed
$619.99
UMI Performance Rear Toe Rods
These UMI Performance rear toe rods play a crucial role in controlling the camber alignment of the rear end, preventing the tire from moving inward or outward during suspension load. Factory toe rods are often made from flimsy stamped steel with soft rubber bushings that can cause deflection, leading to erratic handling, poor traction, and possible rear tire wear. Replacing these factory arms with heavy-duty toe rods can significantly improve the stability of the suspension, traction, and braking performance. UMI Performance rear toe rods are manufactured from 1" x 2" rectangular tubing and fully TIG welded for maximum strength. They are equipped with fluted, greaseable, and low deflection polyurethane bushings from . Installation is a breeze, with these toe rods being a direct bolt-on using OEM hardware. With a durable powder coat finish and made in the USA, these toe rods are sure to enhance the performance of your vehicle.
Not Yet Reviewed
$119.99
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$399.99
UMI Performance Adjustable Trailing Arms
UMI's adjustable trailing arms with Roto-Joints are a valuable addition to enhancing the handling of your application. The UMI Roto-Joint provides articulation similar to a rod end while also offering the comfort of a cushioned bushing. Constructed with strong 1-1/2 in. heavy wall tubing and a laser cut bracket, these trailing arms feature on-car adjustability with an easy and secure adjustment process. They are designed for street, road race, auto-x, and light drag race applications, making them versatile and performance-oriented. Features: * Heavy duty 1/4 in. CNC laser cut mounting brackets * UMI built chromoly on-car adjuster * Exclusive Roto-Joint for awesome performance * Race proven and track tested * 100% Made in Philipsburg, PA-USA
Not Yet Reviewed
$279.99
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$309.99
UMI Performance Rear Adjustable Upper Control Arms
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
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$149.99
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$319.99
UMI Performance Rear Adjustable Trailing Links
UMI Performance rear adjustable trailing links offer a high performance way to stiffen the flimsy factory rear suspension on your vehicle. These arms will be equipped with UMI's exclusive Roto-Joint or race quality rod ends, a chromoly on-car adjuster, heavy-duty tubing, and precision, laser-cut brackets. They are available with a durable gloss black or UMI red powdercoat finish for lasting good looks. Improve suspension stiffness and handling; select the rear adjustable trailing links with your preferred color designed for your vehicle.
Not Yet Reviewed
$239.99
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$289.99
UMI Performance Rear Upper Control Arm Mounts
These UMI Performance rear upper control arm mounts replace the stock control arm mount that attaches the rear upper control arm to the vehicle chassis. UMI Performance rear upper control arm mounts work great when the factory mount is too rusted to reuse or when you're installing a 12-bolt, 4-link setup into a 3-link equipped vehicle. These replacement brackets are CNC-machined from a 0.188 in. thick steel plate and are precision-bent.
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$79.99
UMI Performance Front Non-Adjustable Lower A-Arms
A lightweight setup capable of handling everyday street abuse! UMI Performance front non-adjustable lower A-arms remove 5 1/2 lbs. from of the front of your vehicle, while adding increased ride quality and reducing bushing deflection. These suspension control arms are supplied with new greaseable ball joints installed, polyurethane or Delrin® bushings, and sway bar mounting provisions. The A-arm replacements are fabricated using 1.250 in. drawn-over-mandrel tubing and CNC-machined ball joint holders. They feature both MIG and TIG welding for the utmost in product strength. Order the pair recommended for your vehicle. Additional features: * 1.250 in. x 0.120 in. mild steel tubing * Shock mounts are CNC-machined from 0.188 in. steel plate * Supplied fully assembled and ready to install * Durable black or red powdercoat finish * Use OEM hardware
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$669.99
UMI Performance Rear Control Arms and Panhard Bar Kits
UMI Performance Rear control arms and panhard bars are direct bolt-on replacements designed to minimize wheel hop and improve cornering and track consistency, while lowering ETs. The control arms are constructed from a DOM mild steel tubing 1.375 in. o.d. x 0.095 in. wall and are completely CNC-machined and fully TIG-welded for outstanding strength. The adjustable models feature spherical rod ends that allow for "bind-free" operation, making them great upgrades for both your track and autocross-driven vehicles. The Roto-Joint equipped models are designed to work like a spherical rod end while maintaining the qualities of a softer bushing. Roto-Joints feature a 4140 chromoly ball that rotates in a Delrin race. Additional features include: * Control arms are 1.375 in. x 0.095 in. mild steel tubing * 4130 chromoly threaded tube adapter (adjustable models only) * 3/4 in. hard chrome plated PTFE/KEVLAR® self-lubricating race rod end * TIG-welded construction * CNC-machined 6061 aluminum step bushings with zinc plated steel sleeves (where applicable) * Polyurethane greasable bushings * On car grease fittings (except rod ends) * Use OEM hardware
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$189.99
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$699.99
UMI Performance Front Sway Bars
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.
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$233.99
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$329.99
UMI Performance Rear Adjustable Upper and Lower Control Arm Kits
UMI Performance adjustable upper and lower control arms include tubular single adjustable lower and on-car adjustable upper control arms. These control arms are direct replacements for the OEM setup. They add strength, ride improvement, and most importantly, rear-end adjustment. Additional features include: * 1.500 in. x 0.120 in. mild steel tubing * TIG-welded 4140 chromoly tube adapters * Complete arm features TIG-welded construction * Polyurethane greasable bushings * Durable, long-lasting powdercoated finish * 3/4 in. hard chrome plated PTFE/KEVLAR® self-lubricating race rod end
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$429.99
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$869.99
UMI Performance 1993-2002 GM F-Body Front Upper and Lower A-Arm Kits
Eliminate the flex found in your stock A-arms and add front-end rigidity with increased strength by installing UMI Performance 1993-2002 GM F-body front upper and lower A-arm kits. Designed to outperform your stock setup, these front upper and lower A-arm kits are made from strong DOM steel tubing, 3/16 in. thick CNC-machined ball joint mounts, and they are supplied with greasable polyurethane bushings. These rod ends feature a PTFE-lined, self-lubricating race design for quiet operation and allow free movement and travel to prevent bushing bind. The lower A-arms feature new ball joints and an adjustment if needed. UMI Performance 1993-2002 GM F-body front upper and lower A-arm kits will enhance your daily driver or race car.
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$999.99
