ECS Tuning 2-Piece Semi-Floating Front Brake Discs/Rotors 345mm x 28mm (Pair) - Lightweight Vented Drilled & Slotted - Fits BMW E46 M3 CSL/ZCP Competition Package & Z4M Coupe/Roadster S54 - Performance Track/Fast Road Upgrade

Lightweight two piece front brake discs for BMW E46 M3 and BMW Z4M, 345 mm x 28 mm set

Serious about fast road or track day performance on your M3 E46 or Z4 M. This premium two piece semi floating front disc kit delivers sharper pedal feel, stronger bite, and fade resistance you can trust. Direct fit on CSL and ZCP specifications and a perfect OE-size upgrade for cars running the Competition Package hardware.

Our team and customers love these discs for the way they cut unsprung mass and keep temperatures under control. The result is more responsive steering, quicker acceleration off corners, and confident stopping even after repeated heavy use.

Why upgrade your front discs

• Reduced unsprung weight for improved handling and ride quality
• Lower rotational inertia for faster response and shorter stopping distances
• Enhanced cooling for consistent performance and reduced brake fade
• Outstanding durability to resist distortion under hard use

Engineering highlights

• Alloy hats: lightweight 6061 aluminium hats, hard anodised in matte black for corrosion resistance and long life
• Friction rings: high quality grey cast iron for stable friction and excellent heat absorption
• Semi floating two piece design: allows radial expansion which helps prevent warping under extreme temperature swings
• Heat treated rings for extra stiffness and strength
• Directional internal vanes: curved airflow path accelerates cooling air for consistent temperature control
• Drilled and grooved faces: evacuate gas, water, and dust, refresh the pad surface, and promote clean, predictable bite
• Chamfered holes and precision machined slots to minimise the risk of cracking
• Precision ground braking surfaces for easy bedding and smooth operation
• Painted non-friction areas, including vents, to resist road salt and corrosion
• Stainless rotor set screws included to replace rusty originals

Real weight savings

Each disc is approximately 18 lb compared with an OEM E46 M3 ZCP or CSL front disc at 19.1 lb. Less mass at the wheel means livelier turn-in and a more connected feel.

Sizing and fitment

Front axle disc pair, 345 x 28 mm.

• BMW M3 E46, S54 3.2
• BMW Z4 M Coupé, S54 3.2
• BMW Z4 M Roadster, S54 3.2
• For vehicles with CSL or Competition Package ZCP front brakes

Ideal for

• BMW E46 M3 front brake discs upgrade
• Z4M performance brake discs 345 mm
• Fast road and track day semi floating rotors
• Drilled and grooved vented front discs for M3 and Z4M

Installation

Looking for professional fitting. Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

What you get

• 1 x front disc pair, 345 x 28 mm, semi floating two piece construction
• Stainless rotor set screws

Upgrade your stopping power with confidence. These lightweight, vented, drilled and slotted front discs are a direct replacement that deliver track-proven performance on the road and circuit.