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BMW Chassis Reinforcement Kits & Parts

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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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4mm Heavy Duty Rear Shock Mount Reinforcement Plate Set

T#:376177

Part#: 002478ECS01KT

In Stock

Sale - Save 25% $ 85.99

This product was last offered at the strikethrough price on
06-13-2026

$ 64.48 USD

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Sale - Save 25%

$ 85.99

This product was last offered at the strikethrough price on
06-13-2026

$ 64.48 USD

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A very common weak point on the 3 series BMW is the sheetmetal of the rear shock tower. The sheetmetal here is relatively thin and very susceptible to stress and fatigue. A worn out shock will bottom-out more often and this energy is transferred through the bump stop and into the metal chassis. Stiffer shocks and shock mounts also put more stress on the sheetmetal. Factor in age, mileage, and environmental conditions and it's not a surprise that we see shock tower failures often. BMW addressed this issue with reinforcements of their own but our's are thicker for additional strength. This kit mounts on top of the shock tower and can either be bolted or welded in place. Because of the shape of the rear shock tower, these do not fit cabrio/convertible cars.

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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 6 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

Heavy Duty Convertible Rear Shock Mount Reinforcement Plate Set ...

T#:376176

Part#: 002478ECS02KT

In Stock

Sale - Save 25% $ 95.98

This product was last offered at the strikethrough price on
06-13-2026

$ 71.98 USD

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Sale - Save 25%

$ 95.98

This product was last offered at the strikethrough price on
06-13-2026

$ 71.98 USD

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The upper rear shock bolts to the sheetmetal in the folding top well on convertible models. As the mileage goes up more and more stress is put on this sheetmetal and it can actually tear away from the rest of the chassis. Look for lttle cracks originating from the mouning holes. This reinforcement plate helps spread the shock loads around the sheetmetal and reduce stress in localized areas. Price is for the pair.

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Heavy Duty Rear Sway Bar Bracket Upgrade - E30

T#:9222692

Part#: 016965LA

In Stock

Sale - Save 25% $ 118.99

This product was last offered at the strikethrough price on
06-14-2026

Starting at $ 89.24 USD

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Sale - Save 25%

$ 118.99

This product was last offered at the strikethrough price on
06-14-2026

Starting at $ 89.24 USD

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A major upgrade over the weak stamped steel factory sway bar brackets. These are critical for those running larger, aftermarket sway bars. Includes polyurethane bushings.

ECS Strut Tower Plate Kit - Black

T#:593980

Part#: 001717ECS01

In Stock

$ 193.99 USD

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$ 193.99 USD

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Condor Speed Shop Rear Trailing Arm Pocket Reinforcement Plates - E36...

T#:577570

Part#: REIPLTRTAB36

Ships in 4 Business Days

$ 49.00 USD

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$ 49.00 USD

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Condor's Rear Trailing Arm Pocket Reinforcement Kit is one of the few kits in which the plate is not cut in the shape of a "C". A lot of companies cut them with an opening in order to have less waste when cutting. Their plates are fully connected all the way around making them stronger. This is a must-have reinforcement. The front mounting point of the rear trailing arm is a known area of failure on track driven E36s. Condor's 2-piece reinforcement plate kit reinforces the stock pocket bungs to prevent failure. Welding is required, includes rosette holes. *Does not fit 318ti.

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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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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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Rogue Engineering V-Brace Chassis Support - E46 M3

T#:12643107

Part#: RE.899

Ships in 10 Business Days

$ 595.00 USD

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$ 595.00 USD

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An integral part on E46 M3 is the rear chassis "V-Brace" (BMW # 33312229899) found on all 2001-06 Convertibles and Coupe (including the CSL). This brace attaches to the outward points of the rear chassis and to the area near the rear subframe carrier. Since some of these vehicles are now over 20 years old, we have been seeing more and more of these start to rust away. We began studying the OEM part, curious as to why they were starting to rust away. We found that the two arms of the "V" are made from 38mm x 12mm (1.5" x 0.5") hollow square steel tubing, pressed ends and welded to a junction plate joining them with welds holding the arms at a specific angle. Since the arms are hollow, it helps keep the overall weight down, but does little to prevent corrosion since it is difficult to paint/coat a hollow tube. A Google search turned up very little other than used ones on eBay and new ones that turned out to be in short supply from the BMW dealer (not surprising since the car is over 20 years old). Determined to make something better, we began our engineering and R&D process. Goals of our Design; Modular design, since packaging and shipping something this large would probably be too expensive Costs would dictate material and manufacturing methods Lighter weight would be a secondary (or tertiary) goal, but also keeping in mind costs Corrosion resistant, so it would not rust from the inside out, like the OEM version After weighing the material, manufacturing and cost options, we decided to go with a fully CNC'd ACQ 6061-T6 aluminum assembly. The concept is to machine two identical arms (one part number) and have them joined with a "junction plate". The arms would be secured to the plate with Grade 8.8 grade hardware and the entire assembly would include replacement Grade 10.9 hardware to replace the original OEM hardware (which is probably original). Details of our Design; CNC'd 6061-T6 construction, secured with Grade 8.8 socket head cap screws. Included are replacement Grade 10.9 hardware to fit in the factory locations. About 4 lbs. fully assembled weight (vs. 6.25 lbs for OEM), about a 35% weight savings Anodized gray finish Modular design allows for one arm to be removed in case of exhaust removal requirement. Included in the Kit Two (2) arms of the brace assembly (they are idential) One (1) junction plate One (1) red spacer (this goes BETWEEN the brace and the chassis!) Two (2) blue spacers (these goes BETWEEN the brace and the chassis!) Four (4), M10 socket head cap screws Three (3), M10 flanged hex head bolts It is recommended that the holes used to mount the V-brace onto the car be cleaned before installation by running an M10x1.5 tap to clean each of the holes.

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MINI R56 ECS Strut Tower Plate Kit - Black

T#:588743

Part#: 001718ECS01

In Stock

Sale - Save 3% $ 152.99

This product was last offered at the strikethrough price on
06-14-2026

$ 148.40 USD

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Sale - Save 3%

$ 152.99

This product was last offered at the strikethrough price on
06-14-2026

$ 148.40 USD

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Rogue Engineering F97 X3M / F98 X4M Billet Aluminum Engine Support Br...

T#:26438195

Part#: RE.345

Ships in 4 Business Days

$ 329.00 USD

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$ 329.00 USD

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The Rogue Engineering billet aluminum engine support braces are CNC'd from lightweight ACQ aluminum, specifically designed in Solidworks 3D. The sides of each brace are milled to reduce weight while look aesthetically pleasing. While each OEM steel brace weighs 688g, each of the Rogue Engineering support braces weigh only 380g. The total savings of 1.35 lbs! Sold as a pair, available in anodized black with RE logo laser engraved into the front part of the brace.

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Vargas Billet Ride Height Bracket - Toyota GR Supra (A90/A91) ...

T#:51672702

Part#: VTT-A9X-RIDE-BRA

Ships on Aug 6, 2026

$ 79.99 USD

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$ 79.99 USD

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The Vargas Billet Ride Height Bracket is the "peace of mind" upgrade every MKV Supra owner needs.

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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- Braces (3)

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