Performance Auto Parts for LS Swaps, Muscle Cars & Modern Builds

Shop thousands of in-stock performance parts from trusted brands—engine upgrades, suspension, exhaust, fuel systems, and more. Fast shipping and real-world support from fellow car enthusiasts.

UMI Performance 64-72 GM A-Body Upper & Lower A-Arm Mounting Hardware

$31.99
UMI4004
.ControlArmsPanhardArms .FastenersHardware All Engine Components Hardware Kits - Other UMI Performance
Don't reuse old rusty bolts when installing aftermarket A-Arms when they can easily be replaced with new ones. Our kit includes new high grade...

UMI Performance 64-77 GM A-Body Complete Rear Control Arm Bolt Upgrade Kit

$31.99
UMI4002
.ControlArmsPanhardArms .FastenersHardware All Engine Components Hardware Kits - Other UMI Performance
Don't reuse your old rusty bolts when installing aftermarket control arms when you can replace them with new one. Our kit includes all new...

UMI Performance 64-77 GM A-Body Rear Control Arm Bolt Upgrade Kit

$19.99
UMI4001
.ControlArmsPanhardArms .FastenersHardware All Engine Components Hardware Kits - Other UMI Performance
Don't reuse your old rusty bolts when installing aftermarket control arms when you can replace them with new ones. Our kit includes all new...

UMI Performance 65-70 Chevy B-Body Solid 1in Rear Sway Bar

$219.99
UMI3665-B
.SwayBarsEndLinks All Suspension Sway Bars UMI Performance
This beefy 1” solid rear sway bar is designed to reduce body roll, understeer and increase cornering capabilities resulting in a more balanced suspension....

UMI Performance 78-88 GM G-Body Front 1in 70-81 F-Body 2-1/2in Lowering Spring

$169.99
UMI3050F
All Chassis & Suspension Lowering Springs Suspension UMI Performance
A spring is a spring right? Wrong! When UMI chose to manufacture our own line of springs we went all out. Designed in conjunction...

UMI Performance 82-92 F-Body 78-88 G-Body S10 Tubular Front Lower A-Arms Poly

$729.99
UMI3031-R
.ControlArmsPanhardArms All Chassis & Suspension Control Arms Suspension UMI Performance
UMI lower A-Arms are fabricated from USA DOM tubing with CNC notched tube ends for a precision fit. They are jig built to maintain...

UMI Performance 78-88 GM G-Body Tubular Non-Adjustable Upper Control Arms

$149.99
UMI3016-R
.ControlArmsPanhardArms All Chassis & Suspension Control Arms Suspension UMI Performance
Rear control arms are one of the most important suspension modifications that can be done to your GM vehicle. Stock control arms are on...

UMI Performance 78-88 GM G-Body Tubular Upper & Lower Control Arms Kit

$369.99
UMI301516-R
.ControlArmsPanhardArms All Chassis & Suspension Control Arms Suspension UMI Performance
Rear control arms are one of the most important suspension modifications that can be done to your GM vehicle. Stock control arms are on...

UMI Performance 78-88 GM G-Body Upper & Lower A-Arm Mounting Hardware

$27.99
UMI3013
.ControlArmsPanhardArms .FastenersHardware All Engine Components Hardware Kits - Other UMI Performance
Don't reuse old rusty bolts when installing aftermarket control arms when you can replace them with new ones. Our kit includes new high grade...

UMI Performance 78-92 GM G-Body & F-Body Front A-Arm Hardware Kit

$16.99
UMI3011
.ControlArmsPanhardArms .FastenersHardware All Engine Components Hardware Kits - Other UMI Performance
UMI Performance 78-92 GM G-Body & F-Body Front A-Arm Hardware KitThis Part Fits: Year Make Model Submodel 1978-1987 Buick Regal Base 1988 Buick Regal...

UMI Performance Replacement torque arm bushing for UMI-style mount on 82-02 GM F-Body.

$21.99
UMI3006
.BushingsMounts .Differentials All Chassis & Suspension Differential Bushings Drivetrain UMI Performance
UMI Performance Replacement torque arm bushing for UMI-style mount on 82-02 GM F-Body.Installation InstructionsThis Part Fits: Year Make Model Submodel 1988,1993-2002 Chevrolet Camaro Base...

UMI Performance 82-02 GM F-Body Factory Torque Arm Replacement Bushing

$21.99
UMI3004
.BushingsMounts .Differentials All Chassis & Suspension Differential Bushings Drivetrain UMI Performance
Replacement torque arm bushing for factory style mount on 1982-2002 GM F-Body.Installation InstructionsThis Part Fits: Year Make Model Submodel 1988,1993-2002 Chevrolet Camaro Base 1982-1986...

UMI Performance 78-02 GM Rear Control Arm Bolt Upgrade Kit

$16.99
UMI3001
.ControlArmsPanhardArms .FastenersHardware All Engine Components Hardware Kits - Other UMI Performance
Don't reuse your old rusty bolts when installing aftermarket control arms when you can replace them with new ones. Our kit includes all new...

UMI Performance 70-81 Polyurethane Leaf Spring Shackle Kit

$109.99
UMI2625
All Chassis & Suspension Leaf Springs & Accessories Suspension UMI Performance
UMI's polyurethane shackle kit works with UMI P/N 2620 rear leaf springs as well as other stock location leaf springs. The kit is a...

UMI Performance 93-02 GM F-Body Front A-Arm Kit Non-Adjustable Street

$999.99
UMI230511-B
.ControlArmsPanhardArms All Chassis & Suspension Control Arms Suspension UMI Performance
UMI’s fabricated tubular a-arms provide a rock solid foundation for your 4th Gen’s front suspension. Our a-arm kit is built to offer increased rigidity,...

UMI Performance 82-02 GM F-Body Rubber Bump Stops Pair Rear

$29.99
UMI2056
All Bump Stops Suspension UMI Performance
Replacement rubber bump stops bolt in place of damaged or worn factory bump stops using existing mounting holes. Minor trimming of mounting flange on...

UMI Performance 79-04 Ford Mustang Rear End Housing Bushings

$34.99
UMI1008-R
.BushingsMounts .Differentials All Chassis & Suspension Differential Bushings Drivetrain UMI Performance
Replace the rubber factory rear end housing bushings with a polyurethane setup from UMI. Over time, rubber bushings dry rot, crack and harden, decreasing...
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