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BMW Chassis Reinforcement Kits & Parts

Made in the USA

As much of an "Ultimate Driving Machine" it is, many BMW models unfortunately suffer from weak points in the chassis. Over the years we have uncovered many weak or failure-prone areas in the chassis and have developed our own reinforcing solutions for them. And we continue to be the leading experts on BMW chassis reinforcing. Failures can come from a number, or combination, of causes: improper maintenance, age and mileage, poor design, environmental factors, poor repair work, and over-stressing modifications. The longer you let your car go without repairing or reinforcing these areas, the closer it gets to crumbling apart. Our chassis reinforcement kits are designed to first identify potential weak points and then strengthen and reinforce the existing design.

Most of our kits are not labor intensive although welding is usually required. If you suspect your chassis may have structural problems we recommend taking it to a well-known bodyshop or restoration shop. (find out who your local BMW dealer uses - we sell many of our kits to dealer-authorized repair shops). Making the preventative fix simple and effective is better than a long and complicated repair after the failure. Our kits are not usually used for fixing existing damage (only your body shop can determine the correct course of action). But our kits have been proven under extreme conditions on racetracks around the world to prevent many of the costly - and dangerous - chassis problems.

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Braces (5)

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BMW F8X M2 M3 M4 Chassis Bracing

T#:4070463

Part#: F-BRACE

Ships in 2 Business Days

$ 99.00

This product was last offered at the strikethrough price on
02-23-2026

$ 94.00 USD

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$ 94.00 USD

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BMW F8X M2 M3 M4 Chassis Bracing

The BMW F8X M2 M3 M4 Chassis Bracing is designed to enhance the rigidity and stability of the chassis, providing improved handling and performance for your BMW. Turner Motorsport offers this high-quality brace to support better driving dynamics and reduced flex during aggressive driving.

Benefits:

Enhanced Rigidity: Significantly increases chassis stiffness, leading to improved handling and reduced body roll.
Improved Stability: Minimizes chassis flex for more precise steering responses and better overall control.
High-Quality Construction: Made from durable materials to ensure long-lasting performance and reliability.
Easy Installation: Designed for straightforward installation with minimal modifications required.
Optimized Performance: Perfect for both street and track use, enhancing the driving experience and vehicle performance.

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Rear Chassis Reinforcement Kit

T#:597378

Part#: E36REARCHASSISRK

Ships in 7 Business Days

$ 84.99 USD

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$ 84.99 USD

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Condor Speed Shop's .125" steel Rear Chassis Reinforcement Kit includes everything you need to reinforce the back half of your chassis. The subframe plates are designed to reinforce the subframe mounting points on the chassis of your e36. This is where cracks usually start to form. You can use these plates to repair a cracked chassis or to prevent cracks from forming and avoid costly repairs. The front mounting point of the rear trailing arm is a known area of failure on track-driven E36s. This is a must-have reinforcement. This 6-piece reinforcement plate kit reinforces the stock pocket bungs to prevent failure. .125 (1/8) inch thick 4 rear subframe reinforcement plates 2 rear trailing arm reinforcement plates *Requires welding, professional installation is recommended.*

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Lemforder Spring perch, upper mount - E70, E71

2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:592315

Part#: 31336788776

In Stock

$ 98.99

This product was last offered at the strikethrough price on
07-06-2026

$ 91.99 USD

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$ 91.99 USD

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Supports the front spring on the strut

Suspension Reinforcement Kit

T#:5416754

Part#: 51717036781TMSKT

In Stock

Sale - Save 16% $ 265.00

This product was last offered at the strikethrough price on
04-03-2026

$ 221.81 USD

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Sale - Save 16%

$ 265.00

This product was last offered at the strikethrough price on
04-03-2026

$ 221.81 USD

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Includes RTAB limiter, rear shock tower reinforcement plates and BMW Strut tower plates. If you already upgraded your suspension but are looking for the finishing touch, this kit is what you need. The BMW front strut mount reinforcement plates reduce the risk of the shock tower mushrooming and cracking. The rear shock mount reinforcement plates reduce the risk of the rear shock mount area tearing and deforming. The Delrin rear trailing arm bushing limiters reduce the movement that the RTAB's can make resulting in a tighter rear suspension and with less moment prolongs the bushing life.

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Eventuri BMW G8X M2 / M3 / M4 CSL Carbon Strut Brace - Gloss Finish ...

T#:39565572

Part#: EVE-S58-CF-STR

Ships in 4 Business Days

$ 2,195.00 USD

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$ 2,195.00 USD

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Upgrade your BMW G8X M2, M3, or M4 CSL today with the Eventuri BMW G8X M2 / M3 / M4 CSL Carbon Strut Brace - Gloss Finish, and experience enhanced performance, improved handling, and a race-inspired aesthetic under the hood.

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Rear Subframe Reinforcement Kit

T#:397247

Part#: 13-005

Ships in 4 Business Days

5% off MSRP $ 149.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 142.00 USD

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5% off MSRP

$ 149.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 142.00 USD

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One of the most common issues with the E46 is that the subframe likes to tear away from the chassis. Fix this by welding in a Rear Subframe reinforcement kit.

Includes all necessary reinfored metal plates
Professional installation is required
Suspension must be realigned after installation

Fits the following BMWs:
1998 - 2006 E46 320i 323i 325i 325xi 328i 330i 323ci 325ci 330ci M3

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MMX F56 Under Body Brace - Middle Section

T#:4224050

Part#: MMR13-1401-M

Ships in 4 Business Days

$ 212.99 USD

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$ 212.99 USD

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MMX F56 Under Body Brace - Front Section

T#:4224047

Part#: MMR13-1401-F

Ships in 4 Business Days

$ 195.99 USD

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$ 195.99 USD

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MMX F56 Under Body Brace - Rear Section

T#:4224078

Part#: MMR13-1401-R

In Stock

$ 212.99 USD

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$ 212.99 USD

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Active Autowerke "G-Brace" - G80 G82 G83 G87 M2 M3 M4 S58

T#:25109039

Part#: AAG8XGBRACE

Ships in 4 Business Days

$ 284.99 USD

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$ 284.99 USD

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Active Autowerke designed this piece to allow for more clearance with aftermarket mid-pipes. Factory clearance is tight and not conducive for larger than factory diameter piping. This piece allows for more clearance without sacrificing any structural rigidity and is made from high-strength 6061 aluminum to match the strength of the OEM brace.

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MMX Underbody Chassis Brace - F80, F82, F83, F87

T#:55713525

Part#: MMR13-1000

In Stock

$ 295.00 USD

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$ 295.00 USD

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The MMX Performance Underbody Chassis Brace is engineered specifically for the F8x platform to eliminate the unwanted flex that plagues the factory mid-section. On the track or your favorite backroad, flex alters your alignment mid-corner, reducing tire contact patch.

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G8X M2 / M3 / M4 CSL Carbon Front Strut Brace

T#:26471475

Part#: G8XSB02-CF-AB

Ships in 4 Business Days

$ 3,115.00 USD

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$ 3,115.00 USD

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M4 CSL brace has been designed to enhance the sportive character of M cars, at the same time as it brings the best rigidity to the chassis. Designed and manufactured in Spain under strict quality requirements according to UNE-EN ISO 9001:2015. This piece is made by hand with the best carbon fiber prepreg. This piece is manufactured by combining craft and technology. On the one hand, with the care and attention to detail that characterizes our company, and on the other, with the use of the most modern equipment in some critical points of the process, such as 3D scanning, autoclave curing, and robotic cutting. The G8X CSL strut brace has been manufactured with monobloc tubular technology, avoiding unnecessary joints that could result in weak points. Lamination has been carefully designed, and we include 3 different fabrics, all best quality, including high-modulus unidirectional carbon. 6061 aluminum machined components complete the piece providing great resistance to wear in the area of joint to the chassis. Not just to save weight, but to achieve the strength and rigidity necessary for a functional part with similar characteristics to the OEM part. The result? A piece with an OEM finish and fitment, but with an awesome appearance and only 1.8 kilos, which is a significant weight reduction compared to the original bar which is 3.5 kilos.

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Active Autowerke Chassis Brace - G2X M340i/M440i

T#:51320825

Part#: 11-129

Ships in 4 Business Days

$ 332.00 USD

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$ 332.00 USD

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Active Autowerke designed this piece to allow for more clearance with aftermarket mid-pipes. Factory clearance is tight and not conducive for larger than factory diameter piping. This piece allows for more clearance without sacrificing any structural rigidity and is made from high-strength 6061 aluminum to match the strength of the OEM brace.

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