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BMW Chassis Reinforcement Kits & Parts

Made in the USAAs 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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BMW F8X M2 M3 M4 Chassis Bracing
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:4070463
Part#: F-BRACE
Ships in 1 Business Day
$ 99.00

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

$ 94.00 USD
Free Shipping
$ 94.00 USD
Free Shipping

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 Subframe Reinforcement Kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:397247
Part#: 13-005
Ships in 3 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
Free Shipping
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
Free Shipping

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
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:25109039
Part#: AAG8XGBRACE
Ships in 3 Business Days
$ 284.99 USD
Free Shipping
$ 284.99 USD
Free Shipping
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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aFe CONTROL Front Suspension Brace Set - Raw Stainless Steel Finish -...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
AFE - Corporate Logo
T#:4840538
Part#: 450-721003-A
Ships in 2 Business Days
$ 285.00 USD
Free Shipping on orders $49 and up
Stiffen up your chassis and give your engine bay a unique look with aFe's Control fabricated Strut Braces (also known as Strut Tower Brace or STB). Made with 14-gauge steel, the I-beam design is meticulously TIG welded to form a lightweight, strong brace that will increase front-end rigidity, thus improving turn-in response. aFe Control Suspension products are engineered and manufactured in their Corona, California manufacturing facility. Features: Laser Cut, 14-Gauge 304 Stainless Steel TIG Welded I-Beam Design Grade 5 Burnt Blue Titanium Mounting Bolts Fits All Supra Models Direct-Fit Installation Requires No Modifications Proudly Made in the USA
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aFe CONTROL Front Suspension Brace Set - Black Powder Coat Finish - T...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
AFE - Corporate Logo
T#:4840539
Part#: 450-721003-B
Ships in 2 Business Days
$ 262.00 USD
Free Shipping on orders $49 and up
Stiffen up your chassis and give your engine bay a unique look with aFe's Control fabricated Strut Braces (also known as Strut Tower Brace or STB). Made with 14-gauge steel, the I-beam design is meticulously TIG welded to form a lightweight, strong brace that will increase front-end rigidity, thus improving turn-in response. aFe Control Suspension products are engineered and manufactured in their Corona, California manufacturing facility. Features: Laser Cut, 14-Gauge Steel TIG Welded I-Beam Design Grade 5 Burnt Blue Titanium Mounting Bolts Durable Wrinkle Black Powder Coat Fits All Supra Models Direct-Fit Installation Requires No Modifications Proudly Made in the USA
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aFe CONTROL Front Suspension Brace Set - Red Powder Coat Finish - Toy...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
AFE - Corporate Logo
T#:4840541
Part#: 450-721003-R
Ships in 3 Business Days
$ 262.00 USD
Free Shipping on orders $49 and up
Stiffen up your chassis and give your engine bay a unique look with aFe's Control fabricated Strut Braces (also known as Strut Tower Brace or STB). Made with 14-gauge steel, the I-beam design is meticulously TIG welded to form a lightweight, strong brace that will increase front-end rigidity, thus improving turn-in response. aFe Control Suspension products are engineered and manufactured in their Corona, California manufacturing facility. Features: Laser Cut, 14-Gauge Steel TIG Welded I-Beam Design Grade 5 Burnt Blue Titanium Mounting Bolts Durable Textured Red Powder Coat Fits All Supra Models Direct-Fit Installation Requires No Modifications Proudly Made in the USA
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aFe CONTROL Front Suspension Brace Set - Blue Powder Coat Finish - To...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
AFE - Corporate Logo
T#:4840540
Part#: 450-721003-L
Ships in 2 Business Days
$ 262.00 USD
Free Shipping on orders $49 and up
Stiffen up your chassis and give your engine bay a unique look with aFe's Control fabricated Strut Braces (also known as Strut Tower Brace or STB). Made with 14-gauge steel, the I-beam design is meticulously TIG welded to form a lightweight, strong brace that will increase front-end rigidity, thus improving turn-in response. aFe Control Suspension products are engineered and manufactured in their Corona, California manufacturing facility. Features: Laser Cut, 14-Gauge Steel TIG Welded I-Beam Design Grade 5 Burnt Blue Titanium Mounting Bolts Durable Blue Powder Coat Fits All Supra Models Direct-Fit Installation Requires No Modifications Proudly Made in the USA
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Active Autowerke Chassis Brace - G2X M340i/M440i
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Active Autowerke - Corporate Logo
T#:51320825
Part#: 11-129
Ships in 3 Business Days
New Item
$ 332.00 USD
Free Shipping
$ 332.00 USD
Free Shipping
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.
Show More Show Less