Chassis Stiffeners

Whether it has body-on-frame or unibody construction, your vehicle came from the factory with a chassis designed to flex. Engineers made it this way so that it could...

Whether it has body-on-frame or unibody construction, your vehicle came from the factory with a chassis designed to flex. Engineers made it this way so that it could absorb all the bumps of daily driving while keeping the driver and passengers safe and comfortable.

However, when you’re converting a street vehicle into a racing vehicle, that flexibility becomes a liability. The massive torque of drag racing engines can twist the frame so much that one of the front wheels can lift off the ground, causing a dangerous loss of control, and chassis flex also loosens your handling on road courses and autocross tracks.

Chassis...

Chassis stiffening kits and components reinforce your chassis to make it more rigid. On a unibody vehicle, they usually include connectors to tie the front and rear subframes together. For body-on-frame vehicles, they include braces to tie the sides together, and/or boxing components to close up the channels in the frame rails. Additional components vary by application, manufacturer, and degree of stiffness required.

Top Brands

Summit Racing Equipment has been helping racers and hot rodders meet their performance goals since 1968, so we know all of the ins and outs of a chassis stiffening project. When you’re ready to hit the track, choose parts from brands you can trust, like Hotchkis Sport Suspension, RideTech, Heidts, UMI Performance, BMR Suspension, Stifflers Suspension, and more.

Individual Parts

Part Groups

Results 1 - 25 of 127

Summit Racing™ Frame Brace Kits SUM-770800

Summit Racing™ Frame Brace Kits SUM-770800

Frame Brace, Chassis Stiffening, Steel, Natural, 68-72 Chevelle, GM A-body, Buick, Chevy, Oldsmobile, Pontiac, Kit

Part Number: SUM-770800

4.73 out of 5 stars ( 15 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Summit Racing™ Frame Brace Kits SUM-770801

Frame Brace, Mid Frame, Chassis Stiffening, Steel, Natural, 68-72 GM A-body, Buick, Chevy, Oldsmobile, Pontiac, Kit

Part Number: SUM-770801

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Speedtech Performance USA Frame Brace Kits 30710

Chassis Stiffeners, Frame Brace Kits, Frame Position, Steel, Natural, Designed for A 2-door A-body, Buick, Chevrolet, Oldsmobile, Pontiac, Kit

Part Number: SDP-30710

3.0 out of 5 stars ( 7 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Speedtech Performance USA Frame Brace Kits for 1971-1976 CAPRICE, IMPALA - 60710

FRAME BRACE KIT

Part Number: SDP-60710

Not Yet Reviewed

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Hotchkis Sport Suspension Convertible X Brace Supports 1404

Chassis Stiffener, Chassis Max X-Brace, Rear, Lower, with Hardware, Steel, Black Powdercoated, For Convertible Camaro/Firebird, Kit

Part Number: HSS-1404

4.94 out of 5 stars ( 16 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Stifflers Suspension Web Braces for 1979-2004 MUSTANG - WEB-M01

Chassis Stiffeners, Web Braces, Frame Position, Steel, Black Powdercoated, Ford, Set of 4

Part Number: IVP-WEB-M01

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Steeda S550 Ford Mustang Rear IRS Subframe Support Braces for 2015-2022 MUSTANG - 555-5754

Subframe Braces, Rear IRS, Mustang, S550 Coupe Models, Chromoly, Silver Powdercoat, Chassis Stiffeners, Pair

Part Number: SDA-555-5754

5.0 out of 5 stars ( 11 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

UMI Performance Tubular Front Steering Braces for 1982-1992 CAMARO, FIREBIRD - 2030-R

Chassis Steering Brace, Front Lower, Steel, Black Powdercoated, Chevy, Pontiac, Each

Part Number: UPI-2030-R

4.85 out of 5 stars ( 26 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Heidts Chassis Stiffeners for 1967-1972 C10 PICKUP - BT-661

Chassis Stiffeners, Frame Position, Steel, Natural, 2-door, Chevrolet, Each

Part Number: HDT-BT-661

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

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 ( 7 )

Estimated Ship Date: Tomorrow if ordered today

...Loading

Estimated Ship Date: Tomorrow if ordered today

Need It Sooner? We recommend these similar substitute parts:

UMI Performance Front Reinforcement Braces 3053-R

5 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

...Loading

UMI Performance Tubular Front Steering Braces for 1982-1992 CAMARO, FIREBIRD - 2030-B

Chassis Steering Brace, Front Lower, Steel, Black Powdercoated, Chevy, Pontiac, Each

Part Number: UPI-2030-B

4.92 out of 5 stars ( 12 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

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: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Kentrol Strut Rod Kits 30517

Strut Rod, Radiator Core Support Brace, Front Upper, Stainless Steel, Natural, Jeep CJ, Sold as Pair

Part Number: KTL-30517

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

BMR Cradle Chassis Braces for 2016-2021 CAMARO - CB008R

Chassis Stiffeners, Cradle Chassis Braces, Rear Cradle Position, Steel, Red Powdercoat, Attaches To Front Section of the Cradle and Frame, Chevy, Pair

Part Number: BMR-CB008R

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

BMR Suspension Chassis Stiffeners CB410H

Chassis brace, front reinforcement brace

Part Number: BMR-CB410H

Not Yet Reviewed

Estimated Ship Date: Sep 8, 2025 if ordered today

...Loading

Estimated Ship Date: Sep 8, 2025 if ordered today

Heidts Chassis Stiffeners for 1964-1970 MUSTANG - RM-023

Chassis Stiffeners, Track Bar To Frame, Steel, Natural, for Use with 4-link Rear Ends, Will Not Work with Stock Leaf Spring Applications, Ford, Each

Part Number: HDT-RM-023

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Aug 18, 2025 if ordered today

...Loading

Estimated Ship Date: Aug 18, 2025 if ordered today

Steeda Ford Mustang Rear Chassis X-Braces for 2005-2014 MUSTANG - 555-5093

Chassis X-Brace, Rear, Chromoly, Black Powdercoated, Does NOT Require Rear Seat Delete, Ford Mustang, Each

Part Number: SDA-555-5093

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Aug 25, 2025 if ordered today

...Loading

Estimated Ship Date: Aug 25, 2025 if ordered today

RideTech Frame Braces 11369550

Frame Rail Brace, Steel, Black Powdercoated, Chevy, GMC, Pair

Part Number: ART-11369550

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

Whiteline Chassis Braces for 2005-2014 MUSTANG - KSB729

Chassis Brace, Rear Sway Bar Supports, Steel, Silver Powdercoated, Ford, Each

Part Number: WHL-KSB729

Not Yet Reviewed

Estimated Ship Date: Aug 21, 2025 if ordered today

...Loading

Estimated Ship Date: Aug 21, 2025 if ordered today

Stifflers Suspension Mustang FIT Systems for 2005-2014 MUSTANG - FIT-M03

Chassis Stiffeners, Mustang FIT System, Frame Position, Steel, Black Powdercoated, Ford, Kit

Part Number: IVP-FIT-M03

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

...Loading

Estimated Ship Date: Aug 22, 2025 if ordered today

Hotchkis Sport Suspension Chassis Max Handle Bars for 1970-1981 CAMARO - 20103

Chassis Stiffener, Chassis Max Handle Bars, Front Upper, Steel, Gray Powdercoated, Chevy, Kit

Part Number: HSS-20103

4.5 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

...Loading

Estimated Ship Date: Tomorrow

BMR Suspension Chassis Stiffeners CB400H

CHASSIS BRACE

Part Number: BMR-CB400H

Not Yet Reviewed

Estimated Ship Date: Sep 8, 2025 if ordered today

...Loading

Estimated Ship Date: Sep 8, 2025 if ordered today

Stifflers Suspension F-150 Chassis Stiffening Systems for 2002-2003 F-150 - LCB-HD01

Chassis Stiffener, Frame Brace, Steel, Black Powdercoated, Ford, F-150, Kit

Part Number: IVP-LCB-HD01

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

...Loading

Estimated Ship Date: Aug 22, 2025 if ordered today

Stifflers Suspension Lower Chassis Braces for 1979-2004 MUSTANG - LCB-M03

Chassis Stiffener, Frame Brace, Steel, Black Powdercoated, Ford, Mustang, Kit

Part Number: IVP-LCB-M03

Not Yet Reviewed

Estimated Ship Date: Aug 22, 2025 if ordered today

...Loading

Estimated Ship Date: Aug 22, 2025 if ordered today

BMR Chassis Steering Braces for 1985-1992 CAMARO, FIREBIRD - CB002R

Steering Brace, Steel, Red Powdercoated, Chevy, Pontiac, Each

Part Number: BMR-CB002R

Not Yet Reviewed

Estimated Ship Date: Sep 10, 2025 if ordered today

...Loading

Estimated Ship Date: Sep 10, 2025 if ordered today

Page 1 of 6
Next