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UMI Performance
Do you know when you purchase an item manufactured by UMI you are supporting the United States of America? UMI Performance Inc. proudly designs and manufactures its entire line of products within its facility located in the small town of Philipsburg, Pennsylvania.

UMI Performance Categories

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Items 1-25 of 49
Angle Finder
Antenna
Pit Stop USA is The Online High Performance Superstore! We feature Antennas and Accessories at low everyday prices.
Axle Tube Panhard Bar Mounts
Clamp-on axle tube panhard bar brackets fit 3" diameter axle tubes. Available for left side or right side mount and connects Panhard bar. Clamp-on design allows changing roll center height by...More Details »
Body Mount Repair Kits
Pit Stop USA offers Body Mount Repair Kits at low everyday prices.
Body Mounts
Body Mount Bushings are made of rugged polyurethane material and replace distorted and worn-out original rubber mounts to maintain car body alignment. Polyurethane body mounts are rugged enough for...More Details »
Bump Steer Kits and Components
Bump Steer is caused when the swing arc of the suspension is not matched to the swing arc of the tie rod. Different swing arcs of the tie rod and suspension are what causes Bump Steer. Use...More Details »
Chassis Braces
Pit Stop USA offers Chassis Braces at low everyday prices.
Chevrolet Motor Mounts and Inserts
Pit Stop USA is The Online Motorsports Superstore! We feature Chevrolet Motor Mounts and Inserts at low everyday prices.
Coil-Over Thrust Bearings
Thrust Bearing Kits from PitStopUSA.com install between the spring and the coil-over nut to enable easier turning of the nut under pressure. A must with coil bind, soft spring setups.
Control Arm Brace
Trailing arm mount braces are designed to reinforce the rear upper and lower front control arm mounts on your 78-88 G-Body vehicle. The more power your ride makes the better chance of bending or...More Details »
Control Arm Bracket
Heavy-duty steel control arm brackets add strength and adjustability, eliminating wheel hop, increasing traction, and providing “instant center” corrections. Pit Stop USA has...More Details »
Control Arm Components
Mounts and Shims to get your control arms lined up correctly
Control Arm Fastener Kits
Check out the Recently Listed Control Arm Fastener Kits.
Drive Shaft Safety Loops
Driveshaft safety loops are prevent the driveshaft from whipping in case of u-joint or driveshaft failure and are required by many tracks and sanctions. Whether you need universal or application...More Details »
Driveshaft Tunnel Braces
Pit Stop USA offers Driveshaft Tunnel Braces at low everyday prices.
End Link
Sway bar links (end links) connect the ends of the sway bar to the driver and passenger side suspension. Sway bar bushings are the fulcrum of the sway bar and attach it to the frame of the vehicle.
Frame Notching Plates
Pit Stop USA offers Frame Notching Plates at low everyday prices.
Frame Repair Kits
Pit Stop USA offers Frame Repair Kits at low everyday prices.
Front Control Arms
Stock OEM control arms just wont cut it on race cars and high performance street machines. Hard cornering forces are just too much. Pit Stop USA has a great selection of high performance control arms for your race car.
GM LS-Series Motor Mounts and Inserts
Pit Stop USA offers GM LS-Series Motor Mounts and Inserts at low everyday prices.
K-Members
Pit Stop USA offers K-Members and Components at low everyday prices.
Leaf Spring Fastener Kits
Check out the Recently Listed Leaf Spring Fastener Kits.
Leaf Spring Mounts and Brackets
Leaf spring mounting angles are one of the most important factors in a leaf spring system. In fact, it is more important to get the mounting angles correct than selecting the proper spring rate....More Details »
Levels & Angle Finders
Magnetic Angle Finders feature easy-to-read large diameter faces and a magnetic base. These tools are perfect for setting up machinery, suspensions, checking pinion angles, spoiler angles, etc....More Details »
Lowering Kits and Components
Whether you want to give your vehicle a subtle height adjustment or slam it all the way down to the pavement, Pit Stop USA has a great selection of suspension lowering kits at low everyday prices....More Details »
Items 1-25 of 49

UMI Performance Products

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Items 1-25 of 143
Description: Suspension Spring Kit, 1 in Lowering, 2 Coil Springs, Black Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI4050R
Condition: New
Limited Supply: Only 2 Left!
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Price: $201.99
Sale: $199.50
Save: 1%
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Description: Rear Suspension Kit, Tubular, Panhard Bar / Lower Trailing Arms, Steel, Black Powder Coat, GM F-Body 1982-2002, Kit
Item #: UMI201520-B
Condition: New
Limited Supply: Only 3 Left!
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Price: $200.99
Sale: $198.59
Save: 1%
Save: $2.40
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Description: Rear Suspension Kit, Tubular, Panhard Bar / Lower Trailing Arms, Steel, Red Powder Coat, GM F-Body 1982-2002, Kit
Item #: UMI201520-R
Condition: New
Limited Supply: Only 0 Left!
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Price: $191.99
Sale: $189.99
Save: 1%
Save: $2.00
Description: Suspension Spring Kit, 2 in Lowering, 4 Coil Springs, Black Powder Coat, GM G-Body 1978-88, Kit
Item #: UMI3051
Condition: New
Limited Supply: Only 2 Left!
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Price: $344.99
Sale: $341.32
Save: 1%
Save: $3.67

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Description: Control Arm Bolt, 5/8 in Hex Head, Bolts / Lock Nuts Included, Steel, Natural, GM B-Body 1959-70, Kit
Item #: UMI3606
Condition: New
Limited Supply: Only 2 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $15.99
Sale: $14.99
Save: 6%
Save: $1.00
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Description: Tie Rod Sleeve, 11/16-18 in Female Thread, Hex Tube, Steel, Black Powder Coat, GM F-Body 1970-81, Pair
Item #: UMI2104
Condition: New
Limited Supply: Only 1 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $67.49
Sale: $59.99
Save: 11%
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Description: Sway Bar, Front, 1-3/8 in Diameter, Steel, Black Powder Coat, GM Fullsize Truck 1967-87, Kit
Item #: UMI6440-B
Condition: New
Limited Supply: Only 1 Left!
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Price: $292.99
Sale: $289.99
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Description: Frame Repair Kit, 14 Pieces, Steel, Natural, GM A-Body 1964-72, Kit
Item #: UMI4055
Condition: New
Limited Supply: Only 2 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $33.99
Sale: $32.99
Save: 3%
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Description: Control Arm, Tubular, Lower / Upper, Polyurethane Bushings, Steel, Red Powder Coat, GM A-Body 1964-67, Kit
Item #: UMI401518-B
Condition: New
Limited Supply: Only 1 Left!
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Price: $454.99
Sale: $449.99
Save: 1%
Save: $5.00

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Description: Tie Rod Sleeve, 5/8-18 in Female Thread, Hex Tube, Steel, Black Powder Coat, GM A-Body / F-Body / G-Body, Pair
Item #: UMI2103
Condition: New
Limited Supply: Only 3 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $67.49
Sale: $59.99
Save: 11%
Save: $7.50
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Description: Suspension Spring Kit, 1 in Lowering, 2 Coil Springs, Black Powder Coat, Front Only, GM A-Body 1964-72, Pair
Item #: UMI4050F
Condition: New
Limited Supply: Only 0 Left!
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Price: $191.99
Sale: $189.58
Save: 1%
Save: $2.41
Description: Sway Bar, Rear, 1 in Diameter, Chromoly, Black Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI4034-B
Condition: New
Limited Supply: Only 5 Left!
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Price: $171.99
Sale: $169.99
Save: 1%
Save: $2.00
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Description: Sway Bar, Rear, 1 in Diameter, Chromoly, Red Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI4034-R
Condition: New
Limited Supply: Only 1 Left!
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Price: $171.99
Sale: $169.99
Save: 1%
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Description: Sway Bar, Front, 1-1/4 in Diameter, Chromoly, Black Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI4035-B
Condition: New
Limited Supply: Only 1 Left!
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Price: $259.99
Sale: $257.05
Save: 1%
Save: $2.94

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Description: Sway Bar, Front, 1-1/4 in Diameter, Chromoly, Red Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI4035-R
Condition: New
Limited Supply: Only 1 Left!
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Price: $259.99
Sale: $257.05
Save: 1%
Save: $2.94

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Description: Suspension Spring Kit, 2 in Lowering, 2 Coil Springs, Black Powder Coat, Front Only, GM A-Body 1964-72, Pair
Item #: UMI4051F
Condition: New
Limited Supply: Only 3 Left!
Same Day Shipping!
FREE SHIPPING!
Free Ground Shipping
Price: $191.99
Sale: $189.58
Save: 1%
Save: $2.41
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Description: Drive Shaft Loop, Bolt-On, Steel, Black Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI4500-B
Condition: New
Limited Supply: Only 2 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $80.99
Sale: $79.99
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Description: Trailing Arm, Tubular, Lower, Polyurethane Bushings, Boxed, Steel, Black Powder Coat, GM A-Body 1964-72, Pair
Item #: UMI4024-B
Condition: New
Limited Supply: Only 1 Left!
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Price: $303.99
Sale: $299.99
Save: 1%
Save: $4.00

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Description: Sway Bar, Front / Rear, 1-1/4 in Diameter Front, 1 in Diameter Rear, Chromoly, Black Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI403534-B
Condition: New
Limited Supply: Only 3 Left!
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Price: $409.99
Sale: $405.75
Save: 1%
Save: $4.24

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Description: Sway Bar, Front / Rear, 1-1/4 in Diameter Front, 1 in Diameter Rear, Chromoly, Red Powder Coat, GM A-Body 1964-72, Kit
Item #: UMI403534-R
Condition: New
Limited Supply: Only 0 Left!
Same Day Shipping!
FREE SHIPPING!
Free Ground Shipping
Price: $409.99
Sale: $405.75
Save: 1%
Save: $4.24

Description: Trailing Arm, Tubular, Lower, Polyurethane Bushings, Steel, Black Powder Coat, GM A-Body 1964-72, Pair
Item #: UMI4015-B
Condition: New
Limited Supply: Only 1 Left!
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Price: $212.99
Sale: $209.99
Save: 1%
Save: $3.00
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Description: Control Arm Bolt, 1/2 in Hex Head, Bolts / Lock Nuts / Washers Included, Steel, Natural, GM A-Body 1964-72, Kit
Item #: UMI4002
Condition: New
Limited Supply: Only 0 Left!
Same Day Shipping!
Orders over $149 ship free. Oversize items are excluded.
Price: $28.99
Sale: $27.99
Save: 3%
Save: $1.00
Description: Trailing Arm Bushing, Rear, Polyurethane, Black, GM A-Body / G-Body 1965-88, Kit
Item #: UMI3000-B
Condition: New
Limited Supply: Only 1 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $50.99
Sale: $49.99
Save: 2%
Save: $1.00
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Description: Trailing Arm Bushing, Rear, Polyurethane, Red, GM A-Body / G-Body 1965-88, Kit
Item #: UMI3000-R
Condition: New
Limited Supply: Only 7 Left!
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Orders over $149 ship free. Oversize items are excluded.
Price: $50.99
Sale: $49.99
Save: 2%
Save: $1.00
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Description: Suspension Spring Kit, 1 in Lowering, 4 Coil Springs, Black Powder Coat, GM A-Body 1967-72, Kit
Item #: UMI4050
Condition: New
Limited Supply: Only 2 Left!
Same Day Shipping!
FREE SHIPPING!
Free Ground Shipping
Price: $348.99
Sale: $344.94
Save: 1%
Save: $4.05

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Items 1-25 of 143

More About UMI Performance

Do you know when you purchase an item manufactured by UMI you are supporting the United States of America? UMI Performance Inc. proudly designs and manufactures its entire line of products within its facility located in the small town of Philipsburg, Pennsylvania. The facility features CNC machining, CNC laser cutting, band sawing, press brake operation, MIG and TIG welding, engineering, sand blasting and powder coating.

UMI began in late 2002 under the leadership of Ryan Kirkwood and the guidance of his father Denny. Together this father and son team developed a large variety of products for many makes and models of GM vehicles as well as the Ford Mustang. Ryan saw a large demand for suspension and chassis products, and felt the market was lacking of options. On May 31st 2003, UMI began its official journey in the aftermarket suspension industry with their first test car, a 1994 Ford Mustang GT. This car was used as a test bed for the beginning stages of UMIâ??s Fox and SN95 platform products. The products began to move very quickly, becoming almost impossible to keep in stock. The faster they manufactured them the quicker they sold. In late 2003, UMI purchased a 2000 Pontiac Firebird which was used as their F-Body platform design vehicle. Slowly, products began to arise on the market for the GM F-Body, and quickly UMI became a well-respected company, becoming one of the largest suspension manufactures in todayâ??s market.

Today, UMI operates out of a 35,000 square foot facility staffed with over 30 employees - this new facility located in Philipsburg, PA was recently acquired by UMI in March, 2011. UMI manufactures 99% of their products within their facility from start to finish - from raw 24 foot bars of tubing to a finished product on your door step. UMI is very proud of their success over the past 12 years, and would like to take the time to thank each and every customer for their support. UMIâ??s 30+ hardworking employees are proud to offer you an American made product, hand crafted and fabricated with blood, sweat and pride.