Description
Take your Gen 2 MINI Cooper’s handling to the next level with the M7 Speed Stage 3 Chassis Reinforcement Kit. Designed for serious performance enthusiasts, this bundle combines three of M7’s most popular chassis stiffening upgrades into one cost-saving package:
-
M7 Strut Tower J-Brace Kit
-
M7 Under Strut System (USS)
-
M7 Rear Chassis Brace (RCB)
By reinforcing multiple points of the chassis, this kit delivers a dramatic improvement in rigidity, sharper turn-in, and predictable handling—without sacrificing rear seat usability or requiring a roll cage.
Key Benefits
-
Significantly increases chassis stiffness for maximum grip
-
Reduces understeer and improves steering response
-
Allows suspension components to perform as designed
-
Retains use of rear seats (unlike roll cages)
-
Bolt-on installation with included hardware
Included Components
Strut Tower J-Brace Kit
-
Prevents strut tower mushrooming while improving front-end stiffness
-
CNC-machined from high-strength 6061-T6 aluminum alloy
-
Matte black anodized finish with engraved M7 logo
-
Easy 20-minute installation using stock hardware
-
Fits R56 Cooper S and JCW models (does not fit base Cooper)
Under Strut System (USS)
-
Triangulated three-piece aluminum system for underbody reinforcement
-
Improves turn-in, chassis balance, and reduces flex under load
-
Black anodized finish with stainless hardware
-
Track-tested for durability and performance
-
Direct bolt-on for R56; modification may be required for R57–R59 with certain exhausts
Rear Chassis Brace (RCB)
-
Reduces rear chassis flex for more predictable handling
-
Complements the USS for complete front-to-rear stiffening
-
Maintains rear seat usability with no crossbars or obstructions
-
Ideal for both street and track use
Fitment
-
2007–2015 MINI Cooper S (R56, 1.6L Turbo)
-
2008–2015 MINI John Cooper Works (R56 JCW, 1.6L Turbo)
-
R57 Convertible, R58 Coupe, and R59 Roadster fitment possible with USS modifications (rear brace not compatible)
