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.

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UMI Performance 1978-88 GM G-Body Brake Conversion Brackets 3046

UMI Performance 1978-88 GM G-Body Brake Conversion Brackets 3046

Disc Brake Kit Components, 1978-1988 GM G-Body, C5/C6 Front Brake Conversion Brackets, Pair

Part Number: UPI-3046

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

UMI Performance GM G-Body LSX Engine Mounts 2406-B

Motor Mounts, Plate, Bolt-In, Steel, Black Powdercoated, Buick, Chevy, GMC, Oldsmobile, Pontiac, V8, LSX, Kit

Part Number: UPI-2406-B

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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UMI Performance 1978-88 GM G-Body Brake Conversion Kits 304647

Brake hub, Aluminum, C5/C6 Brake Conversion Hubs, Bearings, Brackets, Kit

Part Number: UPI-304647

Not Yet Reviewed

Estimated Ship Date: Today

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UMI Performance GM G-Body LSX Engine Mounts 2406-R

Motor Mounts, Plate, Bolt-In, Steel, Red Powdercoated, Buick, Chevy, GMC, Oldsmobile, Pontiac, V8, LSX, Kit

Part Number: UPI-2406-R

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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UMI Performance SBC Poly Engine Mount Kits 90071

Motor Mounts, G-Body, Poly, Complete, Black, Polyurethane, Black Powdercoated Brackets, Chevrolet, Pontiac, Buick, Kit

Part Number: UPI-90071

4.89 out of 5 stars ( 9 )

Estimated Ship Date: Today

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UMI Performance Bolt-In Viking Front Coilover Kits 3058-650

Coilover Kit, 1978-88 GM G-Body, 1982-2003 S-10/S-15, Front, Bolt-In, Viking Double Adjustable Shocks, 650 lbs. Springs, Street, Kit

Part Number: UPI-3058-650

4.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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UMI Performance Front Sway Bars 3035-B

Sway Bar, Black, Steel, Front, 1.25 in. Diameter, GM, G-Body, Kit

Part Number: UPI-3035-B

4.56 out of 5 stars ( 9 )

Estimated Ship Date: Today

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UMI Performance Solid Motor Mounts 90059

Motor Mounts, Frame Pad, Bolt-In, Steel, Black Powdercoated, Buick, Chevy, Oldsmobile, G-Body, Small Block, Pair

Part Number: UPI-90059

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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UMI Performance Rear Frame Notch Kits 3061

Frame Rails, Rear Frame Notches, GM G-Body, 1/8 in., Laser Cut, Sold as a Kit

Part Number: UPI-3061

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Today

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UMI Performance Bolt-In Viking Rear Coilover Kits 3065-150

Coilover Kit, 1978-88 GM G-Body, Rear, Bolt-In, Control Arm Relocation, Viking Double Adjustable Shocks, 150 lbs. Springs, Street, Kit

Part Number: UPI-3065-150

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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UMI Performance Front Sway Bars 3035-R

Sway Bar, Red, Steel, Front, 1.25 in. Diameter, GM, G-Body, Each

Part Number: UPI-3035-R

4.5 out of 5 stars ( 8 )

Estimated Ship Date: Today

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UMI Performance Rear Adjustable Upper Control Arms 3037-B

Control Arms, Adjustable, Rear Upper, Steel, Black Powdercoated, GM G-Body, Pair

Part Number: UPI-3037-B

Not Yet Reviewed

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UMI Performance Coilover Kits A204-450R

Viking Coil Over Kit, Front Double Adjustable, Poly, '73-'77 GM A-Body, '78-'88 GM G-Body, '82-'03 S10/S15, 450lb Spring

Part Number: UPI-A204-450R

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

UMI Performance Coilover Kits A224-550S

Viking Coil Over Kit, Front Double Adjustable, Bearing, '73-'77 GM A-Body, '78-'88 GM G-Body, '82-'03 S10/S15, 550lb Spring

Part Number: UPI-A224-550S

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

UMI Performance Coilover Kits A204-250R

Viking Coil Over Kit, Front Double Adjustable, Poly, '73-'77 GM A-Body, '78-'88 GM G-Body, '82-'03 S10/S15, 250lb Springs

Part Number: UPI-A204-250R

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

UMI Performance Front Non-Adjustable Lower A-Arms 3057-1-B

G-Body/S10-S15 Front Lower A-arm, Coilover Only

Part Number: UPI-3057-1-B

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

UMI Performance Ball Joints 101-10020

78-'88 GM G-Body Upper Ball Joint, +1/2? Tall, Proforged

Part Number: UPI-101-10020

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

RideTech Ball Joints 90000913

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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UMI Performance Competition Front End Kits 3059-4-R

Front End Kit, Competition, 1978-88 GM G-Body, 1982-2003 S10/S15, Red Control Arms, Coilovers, 850 lbs. Springs, Race, Kit

Part Number: UPI-3059-4-R

Not Yet Reviewed

Estimated Ship Date: Today

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UMI Performance Disc Brake Kit Components 3047

1978-1988 GM G-Body C5/C6 Brake Conversion Hubs & Bearing Kit

Part Number: UPI-3047

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

UMI Performance Ball Joints 101-10019

78-'88 GM G-Body Upper Ball Joint, Proforged

Part Number: UPI-101-10019

Not Yet Reviewed

Estimated Ship Date: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Moog Ball Joints K5208

4.75 out of 5 stars ( 36 )

Estimated Ship Date: Today

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UMI Performance Front Reinforcement Braces 3053-B

Chassis Stiffeners, Front Reinforcement Braces, Front Lower Position, Steel, Black Powdercoated, Buick, Chevrolet, Oldsmobile, Pontiac, Each

Part Number: UPI-3053-B

5.0 out of 5 stars ( 8 )

Estimated Ship Date: Today

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UMI Performance Heavy-Duty Engine Mounts 90058

Engine Mounts, Heavy Duty, Block Mount, Bolt-In, Steel, Black Powdercoated, Chevy, Pontiac, Small Block, Kit

Part Number: UPI-90058

5.0 out of 5 stars ( 16 )

Estimated Ship Date: Today

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UMI Performance Solid Motor Mounts 90051

Motor Mounts, Frame Pads, Bolt-In, Black Powdercoated, Chevy, Small Block, Pair

Part Number: UPI-90051

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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UMI Performance Front Reinforcement Braces 3053-R

Chassis Stiffeners, Front Reinforcement Braces, Front Lower Position, Steel, Red Powdercoated, Buick, Chevrolet, Oldsmobile, Pontiac, Each

Part Number: UPI-3053-R

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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UMI Performance Coilover Bracket Kits 3054

Coilover Mounts, Rear, Steel, Black, Buick, Chevy, Oldsmobile, Pontiac, Kit

Part Number: UPI-3054

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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