1998 BMW M3 Rear Brake Rotors

CROSS DRILLED SPORT LINE DISC SET – 1 SET = 2 DISCS Reliable on the road, superior on the track. The discs of the Brembo Sport range are ideal for enthusiasts who use their vehicles for both normal road use and more performance-oriented driving. With their advanced characteristics, these discs combine the advantages in terms of durability of the best street discs with superior performance suitable for moderate track use. More flexibility and durability, at all temperatures. For greater versatility and to increase their ability to withstand extreme stress, Brembo Sport brake discs are made from high-carbon cast iron for improved thermal and mechanical resistance. They also feature exclusive pillar venting technology, which improves cooling capacity and increases resistance to cracking caused by thermal shock by over 40%. Cross-drilled finishes are designed and executed with meticulous precision. These holes in the braking surface help dissipate heat and eliminate brake dust and gases. Every Brembo product is designed in relation to the specific performance requisites. The discs of the Sport range are specifically designed to minimize thermal distortion and disc warping even in the most severe operating conditions. As a result, they ensure outstanding braking power in both everyday traffic and the most extreme high performance driving, yet are easily accessible to all enthusiasts. Immediate, consistent braking in all conditions The unique cross-drilled finish is another exclusive Brembo feature which improves braking consistency by dissipating the heat generated and gas released as the pads come into contact with the discs, keeping the pad surface both cool and clean. Cross drilling interrupts the water film forming when driving in the wet for improved brake response. This effect is most evident with cross-drilled discs, due to the different solid/hollow ratio of the surface and the possibility for water to flow through the ventilation holes.

Product Features:

• Cross Drilled design prevents the formation of a film of water on the disc surface in case of rain.
• 100% compatible with the standard components.
• The disc hole shape is designed for top performance and minimum additional wear to the brake pads.
• The protective galvanizing treatment improves the disc’s appearance and prevents corrosion.
• The discs used are produced with high carbon cast iron.

The Zimmermann Formula Z brake disc was designed with the aim of teaming simple installation with optimum braking effect under high mechanical and thermal load. The compound brake disc developed by Zimmermann accommodates the increased demands incurred by engine tuning and optimized chassis structures. COAT-Z – Coat-Z is a protective coating that prevents rust and corrosion, extended rotor life and improved visual appearance. To improve the rust protection during storage and usage, Otto Zimmermann GmbH implements this new Coat-Z technology step by step in its production range. Beside the still optimum function of the brake disc, this coating ensures a consistent attractive appearance. Formula Z – Bake Disc – The composite or compound brake disc named Formula Z is suitable for motorsport applications due to its special design. In contrast to the fully cast-iron brake disc, the friction ring (cast iron) and hub (aluminum alloy) are connected by steel pins. The resulting, floating construction reduces the thermal buffering of the friction ring in the operating temperature state substantially, because the friction ring can freely expand under thermal stress (e.g. when braking from high speeds or several consecutive brake applications). The use of aluminium alloy also considerably reduces the unsprung masses on the vehicle. Material quality / high carbon – Zimmermann brake discs are usually made of cast iron (with flake graphite) of different qualities; they correspond to the material used for the original spare parts. Therefore, the utilization of such materials (referred to as High Carbon by the competition) has always been a matter of course for Otto Zimmermann.

Product Features:

• Excellent deceleration action and no distortion of friction ring at high temperatures
• Substantial weight saving and therefore less unsprung mass
• Floating mounting enables radial expansion of the brake disc under relatively heavy loads, thus preventing shielding and increasing resistance to heat cracks
• Hot spots prevented by optimized design of ventilation channels
• 1:1 exchange of original disc possible
• Not subject to registration: general ABE certification supplied with disc
• No conversion required for brake tuning

The Zimmermann Sport Brake Disc was developed as a result of experience of brake discs in series-production vehicles in connection with racing. The brake system is optimized by combining high-quality cast materials with a slotted or cross-drilled braking surface. Coat-Z Protective Coating – The Zimmermann Coat-Z brake disc provides a protective coating that prevents rust and corrosion, extended rotor life and improved visual appearance. To improve the rust protection during storage and usage, Otto Zimmermann GmbH implements this new Coat-Z technology step by step in its production range. Beside the still optimum function of the brake disc, this coating ensures a consistent attractive appearance. Material quality / high carbon – Zimmermann brake discs are usually made of cast iron (with flake graphite) of different qualities; they correspond to the material used for the original spare parts. Therefore, the utilization of such materials (referred to as High Carbon by the competition) has always been a matter of course for Otto Zimmermann.

Product Features:

• Coat-Z protective anti-corrosion coating
• Better wet braking performance by permanent expulsion of brake dust and water
• Sporty look
• Because of the anti-corrosion protection Coat Z better finish – especially of the hub and the outer diameter
• Noticeable improvement in the braking power of your car
• Prevention of brake fade
• Countersinking of holes doubles up as wear indicator
• 1:1 exchange of original disc possible
• No additional adaption necessary
• Not subject to registration: general ABE certification supplied with disc