ECS Tuning 2-Piece Lightweight Rear Brake Rotors - Pair 328x20 - BMW M3 E46 and BMW M5 E39
Upgrade your BMW braking with ECS Tuning 2-Piece Lightweight Rear Brake Rotors, a premium performance rear disc upgrade for the BMW E46 M3 and BMW E39 M5. These semi-floating, cross-drilled and slotted 328 mm x 20 mm rear rotors deliver faster heat dissipation, reduced unsprung weight and more consistent stopping power. Perfect for fast road and track day use, this direct-fit pair replaces your factory rear discs and transforms pedal feel, response and confidence under hard braking.
We have used these ECS Tuning 2-Piece rear rotors on our own builds and customer cars with excellent results. Customers love the sharper bite, improved consistency and quality finish. If you are searching for BMW E46 M3 rear brake discs, BMW E39 M5 rear brake discs, two-piece rear rotors, lightweight rear discs, performance brake upgrade or cross drilled and slotted rear rotors, this is the high quality bolt-on solution.
Key performance benefits
- Lightweight two-piece design reduces unsprung mass and rotational inertia for more responsive handling and braking
- Semi-floating construction allows radial expansion of the ring to help prevent warping under extreme heat cycles
- Cross-drilled and slotted faces promote rapid heat dissipation, pad deglazing and water and dust evacuation for consistent stopping
- Heat-treated rings for increased strength and stability under repeated heavy braking
- Direct-fit rear axle upgrade for E46 M3 and E39 M5 using factory calipers and hardware
Engineered materials and construction
- 6061 aluminium hats - lightweight, hard anodised in matte black for durability and corrosion resistance
- Grey cast iron rings - proven wear resistance and stable friction characteristics to absorb and shed heat
- Precision machining - chamfered drilled holes and ball end milled slots to reduce the risk of cracking seen on poorly machined rotors
- Quality finish - non-friction surfaces including internal vents are painted to resist salt and corrosion, with ground braking surfaces for easy pad bedding
Specifications
- Position - rear axle
- Diameter and thickness - 328 mm x 20 mm
- Construction - 2-piece semi-floating, cross drilled and slotted, heat treated
- Weight - approx 14.8 lb per rotor vs approx 15.9 lb stock E46 M3 rear rotor
- Finish - matte black anodised hat with painted non-friction surfaces
What you get
- 1 x pair of ECS Tuning 2-Piece Lightweight Rear Brake Rotors - 328x20
- ECS stainless rotor set screws to replace rusty factory fasteners
Fitment
- BMW E46 M3 - S54 3.2
- BMW E39 M5 - S62 5.0
Why buy this rotor upgrade
If you are looking for BMW E46 M3 rear brake upgrade, BMW E39 M5 rear brake upgrade, ECS Tuning rear rotors, two piece rear discs, lightweight rear brake rotors, drilled and slotted rear discs, performance brake discs for track days and fast road, these ECS Tuning 2-Piece rotors deliver superb heat management, reduced fade and confident braking lap after lap. The two-piece design also allows the ring to be replaced in future when worn.
Professional fitting available
We recommend professional installation and correct bedding in for best results. Nforcd offers fitting at our Warwickshire workshop. Request a fitting quote at Sales@nforcd.com.
Notes
- Direct replacement for the factory rear discs on the listed models
- Designed for both street and track performance