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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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MINI R53 M7 Strut Reinforcement Plates 53-510101
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
M7 Speed - Corporate Logo
T#:599900
Part#: 53-5M7101
In Stock
$ 140.99 USD
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$ 140.99 USD
Free Shipping

M7 Strut Reinforcement Plates 53-510101 are the ultimate solution for MINI owners facing the common issue of strut tower mushrooming caused by heavy impacts from shocks and low aspect ratio tires. Over time, MINI's shock towers can develop a convex shape, disrupting suspension alignment and leading to a noticeable pull to one side. The M7 Strut Reinforcement Plates (SRPs) address this problem by reinforcing the sheet metal and shock top plate, creating a durable surface that resists bending, even during hard impacts.

Designed specifically for the R50 Base Model Cooper, the R52 Convertible, and the R53 Cooper S, these SRPs are an essential upgrade for any MINI enthusiast. Constructed from CNC machined billet aluminum and black anodized for durability, the 1/2" (13mm) thick plates cover the entire surface of the strut tower, distributing loads evenly and providing peace of mind.

Whether you drive your MINI daily or push it to the limits on the track, M7 Strut Reinforcement Plates offer a cost-effective preventative measure against expensive suspension repairs. Easy to install in less than 20 minutes, the SRPs use the stock nuts for mounting and come with instructions that also guide you through fixing existing mushrooming.

  • Prevents strut tower mushrooming
  • Constructed from CNC machined billet aluminum
  • Black anodized for long-lasting durability
  • Covers the entire strut tower surface
  • Designed for R50, R52, and R53 MINI models
  • Easy installation with stock nuts
  • Made in the USA
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MINI Coopers R55-R59 2” LIFT KIT M7 Speed
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
M7 Speed - Corporate Logo
T#:596945
Part#: 56-555100
In Stock at Vendor
$ 590.99 USD
Free Shipping
$ 590.99 USD
Free Shipping

M7 Speed Suspension Product for Generation 2 MINI Cooper Models (R55-R59)

M7 Speed proudly introduces a unique suspension product for the popular Generation 2 MINI Cooper models R55 through R59. These affordable vehicles are becoming the choice for many entry-level modifiers in the German performance car segment, and they are great for Rally Cross.

Engineered to transform the mild-mannered MINI into a more capable and versatile daily driver, this product is perfect for today’s lifestyle. Whether it's for spirited adventure motoring, weekend overlanding, living off the grid, or tackling pothole-riddled urban streets, the M7 Speed 2" Lift Kit makes it possible. By installing this lift kit, the MINI is elevated by 2 inches, plus an additional lift from larger diameter tires (up to an extra 1.5 inches). No additional modifications are required—simply bolt it in, perform a realignment, and enjoy! Add aftermarket wheels and larger tires to create a unique, durable, and practical vehicle that everyone will love.

The M7 Speed Stage 1 Kit includes everything needed for the transformation. This kit features precision-fabricated lift blocks and a set of MAXX-G heavy-duty adjustable front sway bar links. These shorter links are necessary to prevent suspension bind that can occur with stock-length sway bar links.

Stage 1 Kit Includes:

  • 2" Lift Kit with high-strength assembly hardware (2 front riser blocks, 2 rear riser blocks)
  • Set of MAXX-G Heavy Duty Adjustable Front Sway Bar Links
  • Hardware kit with high-strength, proper-length bolts and new locking nuts

Features:

  • Engineered using 3D CAD software and finite element simulation for proper fitment and safe, fail-proof performance
  • CNC laser-cut parts
  • Lightweight fabricated steel design
  • Black urethane powder coating for corrosion protection and a quality appearance
  • Designed for easy bolt-on installation, complete with all new high-strength hardware and installation instructions

MAXX-G Adjustable Sway Bar:

  • Enhances cornering performance, provides bind-free suspension travel, improves suspension alignment, and overall chassis balance
  • Features sealed and permanently lubricated forged steel ball stud & socket ends for easy installation
  • Includes a military-grade aluminum adjuster sleeve with opposing RH & LH threads for simple length adjustments
  • Replaceable link ends make maintenance easy

M7 Speed is the world leader in MINI adventure motoring, overlanding, and ultimate performance products. Renowned for exceptional customer service and product innovation, M7 Speed is dedicated to engineering and producing high-quality, easy-to-install aftermarket performance products. Located in Mooresville, North Carolina, also known as Race City USA, M7 Speed is at the epicenter of North American motorsports.

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MINI Cooper R50-R53 2” LIFT KIT M7 Speed
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
M7 Speed - Corporate Logo
T#:597716
Part#: 53-555100
In Stock at Vendor
$ 610.99 USD
Free Shipping
$ 610.99 USD
Free Shipping

M7 Speed Suspension Product for Generation 1 MINI Cooper (R50-R53)

M7 Speed introduces a unique suspension product for the popular Generation 1 MINI Cooper models R50 through R53. These affordable vehicles are becoming the choice for many entry-level modifiers in the German performance car segment, and this product is great for Rally Cross.

Engineered to convert the mild-mannered MINI into a more capable and versatile daily driver, this kit is perfect for spirited adventure motoring, weekend overlanding, living off the grid, or navigating pothole-riddled urban streets. The M7 Speed 2" Lift Kit lifts the MINI 2" higher, plus an additional lift from larger diameter tires (up to an extra 1.5"). No additional modifications are required—just bolt it in, realign, and enjoy! Enhance your MINI with aftermarket wheels and larger tires for a more durable, practical, and enjoyable vehicle.

Stage 1 Kit Includes:

  • 2" Lift Kit with high-strength assembly hardware (2 front riser blocks, 2 rear riser blocks)
  • MAXX-G Heavy Duty Adjustable Front Sway Bar Links
  • Hardware kit with high-strength proper length bolts and new locking nuts

Features:

  • Engineered using 3D CAD software and finite element simulation for proper fitment and safe performance
  • CNC laser-cut parts
  • Lightweight fabricated steel design
  • Black urethane powder coated for corrosion protection and a quality appearance
  • Easy bolt-on installation with all new high-strength hardware and installation instructions

MAXX-G Adjustable Sway Bar:

  • Enhances cornering performance, bind-free suspension travel, better suspension alignment, and overall chassis balance
  • Sealed and permanently lubricated forged steel ball stud & socket ends for easy installation
  • Military grade aluminum adjuster sleeve with opposing RH & LH threads for simple length adjustments
  • Replicable link ends for easy maintenance

M7 Speed is the world leader in MINI adventure motoring, overlanding, and ultimate performance products. Known for exceptional customer service and product innovation, the company is dedicated to engineering and producing high-quality, easy-to-install aftermarket performance products. M7 Speed is located in Mooresville, North Carolina, also known as Race City USA.

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Rogue Engineering V-Brace Chassis Support - E46 M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Rogue Engineering - Corporate Logo
T#:12643107
Part#: RE.899
Ships in 9 Business Days
$ 595.00 USD
Free Shipping on orders $49 and up
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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Rogue Engineering F97 X3M / F98 X4M Billet Aluminum Engine Support Br...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Rogue Engineering - Corporate Logo
T#:26438195
Part#: RE.345
Ships in 3 Business Days
$ 329.00 USD
Free Shipping
$ 329.00 USD
Free Shipping
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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MINI R50 R53 M7 Stage II Suspension Kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
M7 Speed - Corporate Logo
T#:31191876
Part#: 53-5M7551
Ships in 3 Business Days
$ 678.99 USD
$ 678.99 USD

MINI R50 R53 M7 Stage II Suspension Kit is perfect for the ultimate MINI performance enthusiast. M7 Tuning has bundled the final two pieces needed to transform your MINI from a go-kart into an F1 turning machine. If you already have the M7 Strut Tower Brace, this bundle is for you. Add these industry-leading bolt-on MINI Cooper suspension components and experience instant grip like never before. This Stage II Bundle includes the exclusive Under Strut System and the M7 Rear Chassis Brace for the R53 Mini Cooper.

Compared to buying these kits separately, you save money and gain a significant upgrade in performance. One of the biggest improvements you can make to gain grip is stiffening your chassis. A stiffer chassis allows the suspension, like the springs, shocks, and sway bars to work more effectively and do their job as intended, keeping the tires in better contact with the road. The M7 Under Strut System (USS) and Rear Chassis Brace feature easy-to-install integrated billet and extruded aluminum pieces that will brace, connect, and triangulate your MINI Cooper chassis for greatly improved chassis stiffness. This maximizes grip, increases steering response, and reduces understeer during aggressive turn-in or emergency maneuvers. This is a "WOW! Why didn't I do this sooner?" addition to your favorite speed monster. M7 Tuning products are engineered, tested, and proven to perform.

Under Strut System:

  • Greatly improves chassis stiffness
  • Enhances turn-in capability and reduces understeer
  • Made of extruded and CNC machined aluminum with a black anodized finish
  • Durable and designed to prevent chipping and corrosion
  • Includes stainless steel fasteners and necessary tools for installation
  • Easy to install

Rear Chassis Brace:

  • Reduces chassis flex for improved handling
  • Enhances rear-end stability and responsiveness
  • Allows for comfortable use of the rear seats
  • Provides a mounting option for a fire extinguisher or other accessories
  • Compatible with M7 Under Strut System for maximum chassis stiffening
  • No sacrifice of passenger comfort
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