Thursday, February 12, 2026

Build a R5x MINI Cooper for Track Use

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This build out covers the 2003-2009 R5x (Cooper, S, JCW) MINI’s


We’ve broken down what you’d need to do to your MINI to get it track ready

**NOTE: The stages outlined below tend to be cumulative. For example, if you’re considering a Stage-3 build, you will be have to use some if not most of the upgrades from Stage-1 and Stage-2. For overlapping mods like suspension, you can skip to the higher stage, but pay attention to how the “set” comes together.

Stage 1 – Better than Stock (Autocross-able)

Description
Part No. | Category | Purchase Thru | MSRP
Everything OE is fine, except the tires – RunFlats are a bad idea!
TiresTireRack
Air filter
Engine$60
Haynes Manual
Amazon
$50

Stage 2 – Hybrid Street/Track

Description
Part No. | Category | Purchase Thru | MSRP
Zero (0) Toe alignment (massive impact)
Suspension$150.00
Mid-Level Pads
Brakes
Solid Transmission / Motor Mounts (You will stop missing shifts)
Engine
Motul 600 or better Brake Fluid
Brakes
Crank Pulley (eventually rubber will fail, replace with ATI or fluid damper)
Engine
Camber Plates (Max Negative in the Front)
Suspension
Rear Sway Bar
Suspension
New supercharger tensioner every 2 years and new belt every year
Engine
Cold Air intake
Engine$200 – $400
Cooper S smaller supercharger Pulley
Engine$150
Exhaust (Borla)
Engine$900
Brakes (Rotors & Pads) EBC, Hawk
Brakes$700
Colder spark plug  – NGK
Engine$20

Stage 3 – Dedicated Track Rat

Description
Part No. | Category | Purchase Thru | MSRP
Solid control arm bushings (OE will wear out every 2 years)
Suspension
Strut Braces from MINI Convertible
Suspension
ATM balancer
Engine$600
Intercooler
Engine$800-$1200
Helmet
SafetyOGRacing
$400+
Hans
SafetyOGRacing
$400+
Shoes & Gloves
SafetyOGRacing
$200 – $2000
Firesuit
SafetyOGRacing
$100+
Roll bar or Cage
Safety$800 or $1200
Racing harness (RCI, Gforce etc)
SafetyOGRacing
$150+
Racing seat
SafetyOGRacing
$400-$1000
Front Camber plates
Suspension$400
Coil over shocks (bilstien B14)
Suspension$1,200
Rear camber links
Suspension$250+
Rear Sway bar (19mm to 22mm)
Suspension$200 – $400
Brakes front (Wilwood, Hawk, Brembo)
Brakes$1100 +
Brakes rear (Wilwood, Hawk, Bembo)
Brakes$900 +
Powerflex bushes (set)
Suspension$290
ECU tune (M7)
Engine$500+
Tires  (hoosier, Hankook, bridgestone)
SuspensionTireRack
$800+

Stage 4 – Competition Car

Description
Part No. | Category | Purchase Thru | MSRP
Transponder
OGRacing
$180+
Race Pads & R-Comp Tires (recommend upgrading at the same time, or you will overpower the tires)
TiresTireRack

 

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