StopTech 02-06 Mini Cooper/Cooper S (No JCW) Front BBK w/Black ST-40 Calipers Slotted 328x28mm Roto

Brand: StopTech

Product Code: 83.138.4300.51

Availability:In stock


Caliper Color: Black
Caliper Construction: Fixed
Caliper Type: 4-Piston
Caliper Series: ST-40
Minimum Wheel Diameter Required: 431.8mm (17")
Driving Style: Performance / Racing, Track Only
Rotor Thickness: 28mm (1.1")
Outside Diameter: 328mm (12.91")
Rotor Construction: 2-Piece
Rotor Material: Cast Iron
Rotor Style: Slotted
Rotor Type: Vented
Rotor Coating: W/O Coating
Series: Performance


Stiffest aftermarket caliper available gives a consistent firm pedal
Fully machined and lightweight for track action
Fully forged and extremely stiff for firmer brake pedal feel
Meticulously engineered 2-piece design reduces flex
Patented, removable center bridge further resists yaw(flex)
Carefully selected piston sizes for precise torque output
Specifically engineered and patented AeroVanes for optimum cooling
Patented, billet 7075 aluminum AeroHats for improved airflow
Full-floating mounting hardware to eliminate pad knock-back
Optimized to provide even performance and consistent feedback
Hard-anodized hats are impervious to color change or fading
Stainless steel studs secured with set screws for strength and durability
Fully machined aluminum or steel that is precise and strong
Application specific design for precise and proper fitment
Stainless steel braiding for lower compliance and extra protection
A variety of fittings for hundreds of applications
All necessary brackets and fasteners for easy installation
Better brake modulation
Patented design with directional stand offs between the rotor and mounting bell
Increases airflow by 50%-100% over traditional 2-piece designs
Increased airflow reduces the temperature difference between the inside and outside rotor faces
Results in less distortion and better performance compared to other fully floating designs
Outer pad wear is reduced


Slots create an escape route for debris, dust, gases, and water
Slots reduce stopping distances in wet weather
Slots clean and de-glaze pad surface for optimum pad coefficient of friction
Slots help to increase pad bite and improve air circulation
Vented type of rotors offers much faster heat dissipation
Multi-piston calipers provide clamping force on both sides of the rotor at the same time and uniformly transfer braking force to the brake pads
Caliper pistons are hollow to save weight
Aluminum caliper body allows for exceptional light weight (up to 40% of weight savings) and ensures superior corrosion resistance
Caliper heat-resistant coating prevent cracking and fading
Fixed calipers create friction from the brake pads on both sides of the rotor at minimum time interval

StopTech Big Brake Kits exceed stock performance in two key areas: First, larger rotors increase heat capacity, allowing a driver to brake harder stop-after-stop with reduced chance of fade. Second, stiffer calipers and stainless steel lines reduce system compliance, providing consistent pedal feel and confidence-inspiring responsiveness. The key, however, is to increase heat capacity and reduce compliance without upsetting a vehicle's stock front-to-rear brake torque ratio. That is why StopTech developed the Balanced Brake Upgrade design philosophy, which precisely apportions front and rear braking resources while factoring in vehicle weight transfer under braking. Every StopTech Balanced Big Brake Kit is engineered to produce that optimal balance using caliper bores and pistons specifically selected and tested for each vehicle application. This is what sets StopTech apart from off-the-shelf solutions. In contrast, a brake upgrade that adds too much front torque (as many do), will reduce your car's ability to maximize the traction available from all four tires, robbing you of performance. In addition, a system that uses too many pistons or pistons that are too large will make the brake pedal much more difficult to modulate, limiting a driver's control of brake input.