{"product_id":"ecs-tuning-2-piece-lightweight-front-brake-rotors-pair-300x22-e46","title":"ECS Tuning Two-Piece Lightweight Front Brake Discs\/Rotors 300x22mm, Drilled \u0026 Grooved\/Slotted","description":"\u003cdiv\u003e\n  \u003ch2\u003eTwo 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\u003c\/h2\u003e\n\n  \u003cp\u003eUpgrade 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.\u003c\/p\u003e\n\n  \u003cp\u003eWe 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.\u003c\/p\u003e\n\n  \u003ch3\u003eWhat makes this brake upgrade special\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eWeight 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.\u003c\/li\u003e\n    \u003cli\u003eSemi floating design – allows the iron ring to expand under temperature without distortion for fade resistance and stability under heavy use.\u003c\/li\u003e\n    \u003cli\u003eDrilled and grooved faces – vents gases and debris, keeps pads clean and helps wet weather braking.\u003c\/li\u003e\n    \u003cli\u003eImproved pedal response – reduced inertia and better thermal management give consistent, confident braking lap after lap and mile after mile.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eConstruction and materials\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eSize – 300 mm x 22 mm front discs supplied as a matched pair.\u003c\/li\u003e\n    \u003cli\u003eTwo piece assembly – high strength grey cast iron rings bolted to lightweight aluminium hats to cut unsprung mass and shed heat quickly.\u003c\/li\u003e\n    \u003cli\u003eAluminium hats – 6061 alloy, hard anodised matte black for durability and corrosion resistance.\u003c\/li\u003e\n    \u003cli\u003eHeat treated rings – increased stiffness and long term performance under repeated thermal cycles.\u003c\/li\u003e\n    \u003cli\u003ePrecision machining – chamfered drillings and ball end milled slots to help reduce the risk of cracking and maintain pad contact.\u003c\/li\u003e\n    \u003cli\u003eProtected non friction areas – painted vents and hubs to fight rust and road grime with precision ground faces for easy bedding in.\u003c\/li\u003e\n    \u003cli\u003eIncludes ECS stainless rotor set screws – a smart upgrade over rusty factory fasteners.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eFitment – check your front disc size is 300 x 22 mm\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eBMW E46 323Ci, 323i\u003c\/li\u003e\n    \u003cli\u003eBMW E46 325Ci, 325i, 325xi\u003c\/li\u003e\n    \u003cli\u003eBMW E46 328Ci, 328i\u003c\/li\u003e\n    \u003cli\u003eBMW Z3 3.0i\u003c\/li\u003e\n    \u003cli\u003eBMW Z4 3.0i M54\u003c\/li\u003e\n    \u003cli\u003eBMW Z4 3.0i N52\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eReal world gains\u003c\/h3\u003e\n  \u003cp\u003eLower 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.\u003c\/p\u003e\n\n  \u003ch3\u003eProfessional fitting\u003c\/h3\u003e\n  \u003cp\u003eWe can fit these for you at MJ Modifications in Warwickshire. For a fitting quote or setup advice, email info@mjmodifications.co.uk.\u003c\/p\u003e\n\n  \u003ch3\u003eSearch friendly terms customers use\u003c\/h3\u003e\n  \u003cp\u003eBMW E46 front brake upgrade, 300x22 front brake discs, two piece performance rotors, grooved and drilled BMW discs, semi floating front discs, lightweight brake rotors BMW 3 Series, E46 323 325 328 brakes, BMW 325xi front discs, Z3 3.0 front brake rotors, Z4 3.0 performance discs, fast road brake kit E46, track day brake discs BMW, aluminium hat rotors, heat treated iron rings, fade resistant brake discs, reduced unsprung mass brake upgrade, BMW E46 performance braking, drilled and grooved rotors, ECS front discs for BMW.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Performance M","offers":[{"title":"Default Title","offer_id":55975247249794,"sku":"ES2986438","price":626.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/dsd__88573.1533826115.jpg?v=1763321396","url":"https:\/\/mjmodifications.co.uk\/products\/ecs-tuning-2-piece-lightweight-front-brake-rotors-pair-300x22-e46","provider":"MJ Modifications","version":"1.0","type":"link"}