ECS Tuning Two-Piece Lightweight Front Brake Discs/Rotors 300x22mm, Drilled & Grooved/Slotted

Two Piece Lightweight Front Brake Discs 300 x 22 mm, Drilled and Grooved, Semi Floating – Pair – BMW 3 Series E46, Z3 3.0, Z4 3.0

Upgrade your stopping performance with these ECS two piece front brake discs designed for 300 x 22 mm applications. A direct replacement for the standard front setup, they deliver serious braking confidence on the road and on spirited drives thanks to weight saving construction, rapid heat control and consistent pedal feel. If you want a fast road and track capable front brake solution for your BMW, this pair is a proven choice.

We have fitted these on customer cars and on our own builds and the feedback has been superb. Sharper bite, repeatable stops and noticeably lighter steering response from reduced unsprung mass. Customers repeatedly comment on the improved confidence in all weather conditions.

What makes this brake upgrade special

• Weight saving – approximately 3.6 lb per disc lighter than OE. Around 12 lb each versus roughly 15.6 lb stock, reducing rotating mass for livelier turn in and acceleration.
• Semi floating design – allows the iron ring to expand under temperature without distortion for fade resistance and stability under heavy use.
• Drilled and grooved faces – vents gases and debris, keeps pads clean and helps wet weather braking.
• Improved pedal response – reduced inertia and better thermal management give consistent, confident braking lap after lap and mile after mile.

Construction and materials

• Size – 300 mm x 22 mm front discs supplied as a matched pair.
• Two piece assembly – high strength grey cast iron rings bolted to lightweight aluminium hats to cut unsprung mass and shed heat quickly.
• Aluminium hats – 6061 alloy, hard anodised matte black for durability and corrosion resistance.
• Heat treated rings – increased stiffness and long term performance under repeated thermal cycles.
• Precision machining – chamfered drillings and ball end milled slots to help reduce the risk of cracking and maintain pad contact.
• Protected non friction areas – painted vents and hubs to fight rust and road grime with precision ground faces for easy bedding in.
• Includes ECS stainless rotor set screws – a smart upgrade over rusty factory fasteners.

Fitment – check your front disc size is 300 x 22 mm

• BMW E46 323Ci, 323i
• BMW E46 325Ci, 325i, 325xi
• BMW E46 328Ci, 328i
• BMW Z3 3.0i
• BMW Z4 3.0i M54
• BMW Z4 3.0i N52

Real world gains

Lower unsprung mass and reduced rotational inertia make the front end feel more agile and composed, while the semi floating two piece design combats fade and distortion that can plague one piece discs. Drilled and grooved faces maintain consistent friction, helping confident stops on B roads, motorways and track days.

Professional fitting

We can fit these for you at MJ Modifications in Warwickshire. For a fitting quote or setup advice, email info@mjmodifications.co.uk.

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