{"product_id":"ecs-tuning-2-piece-lightweight-front-brake-rotors-pair-325x25-e46-330-z4-3-0","title":"ECS Tuning 2-Piece Semi-Floating Front Brake Discs\/Rotors 325x25mm – Drilled, Grooved\/Slotted, Vented, Lightweight – BMW E46 330i 330Ci 330xi \u0026 Z4 E85\/E86 3.0i 3.0Si – Direct-Fit Pair\/Set Fast Road \u0026 Track Day","description":"\u003cp\u003e\u003cstrong\u003eBMW E46 330 and Z4 3.0 front brake upgrade for fast-road and track-day performance\u003c\/strong\u003e. If you want sharper pedal feel, cooler running and reduced fade, these lightweight two-piece front discs deliver a serious step up in stopping power and handling response. Designed as a direct-fit pair for the front axle, they use a semi-floating construction to keep temperatures under control and to resist distortion under hard use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy enthusiasts choose this setup\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReal-world performance: noticeably quicker bite, more consistent braking and improved stability under repeated heavy stops.\u003c\/li\u003e\n  \u003cli\u003eLower unsprung and rotational mass: each disc is around 15.1 lb versus approximately 19.1 lb for OE, which helps turn-in, ride quality and acceleration.\u003c\/li\u003e\n  \u003cli\u003eOutstanding heat management: vented, cross-drilled and slotted rings sweep away gases, water and debris for reliable performance in all weather.\u003c\/li\u003e\n  \u003cli\u003eWarp resistance: the semi-floating interface allows the ring to expand radially under heat, minimising the risk of judder.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey construction details\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAluminium hats: CNC machined from 6061 alloy then hard-anodised in matte black for strength and corrosion resistance.\u003c\/li\u003e\n  \u003cli\u003eGrey cast iron rings: favoured for stable friction and durability, engineered to absorb and shed heat rapidly.\u003c\/li\u003e\n  \u003cli\u003eHeat treated rings: increased stiffness and strength for long service life.\u003c\/li\u003e\n  \u003cli\u003ePrecision machining: chamfered holes and ball end-mill slots reduce stress risers, with ground friction faces for easy bedding-in.\u003c\/li\u003e\n  \u003cli\u003eNon-friction surfaces painted, including internal vents, to resist salt and grime.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDisc size: 325 x 25 mm\u003c\/li\u003e\n  \u003cli\u003eFront axle, supplied as a matched left and right pair\u003c\/li\u003e\n  \u003cli\u003eIncludes stainless rotor set screws to replace rusty originals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBMW E46 330i, 330Ci, 330xi with M54 3.0\u003c\/li\u003e\n  \u003cli\u003eBMW Z4 3.0i and 3.0Si with N52 3.0\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTrusted by us and our customers\u003c\/strong\u003e\u003cbr\u003e\nWe have run these on our own builds and customer cars with excellent feedback on bite, modulation and fade resistance. Ideal for spirited road driving and club-level track use when matched with quality pads and fluid.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProfessional fitting available\u003c\/strong\u003e\u003cbr\u003e\nWant them installed correctly first time with proper torque settings and pad bedding guidance? Book fitting with MJ Modifications in Warwickshire. Email \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e for a quote.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon searches\u003c\/strong\u003e\u003cbr\u003e\nBMW E46 330 front brake discs, E46 performance brake upgrade, lightweight two piece brake discs, semi floating front discs, 325mm grooved and drilled discs, Z4 3.0 front discs UK, fast road brake kit, track day brake discs, vented performance rotors, anodised aluminium hat brake discs, reduced unsprung mass brake upgrade, direct replacement front discs, BMW 330i 330Ci 330xi brake upgrade, Z4 3.0Si brake discs, high performance braking solution.\u003c\/p\u003e","brand":"Performance M","offers":[{"title":"Default Title","offer_id":55975247282562,"sku":"ES2739176","price":646.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/ddddddd__09605.1533808152.jpg?v=1763321401","url":"https:\/\/mjmodifications.co.uk\/products\/ecs-tuning-2-piece-lightweight-front-brake-rotors-pair-325x25-e46-330-z4-3-0","provider":"MJ Modifications","version":"1.0","type":"link"}