BMW Brake Rotors

Discovery Parts is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits BMW E9x M3 The GiroDisc system is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Discovery Parts RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   Our replacement rings are sold in pairs and include replacement hardware. The only parts you will reuse are your existing GiroDisc hats. Please note that unless specifically noted, GiroDisc replacement rings are only designed to work with GiroDisc hats. They are not designed to be used with other brands, including hats from cars equipped with 2-piece rotors from the factory.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   Introducing the GiroDisc 2-piece rotors, designed as a direct replacement for the E46 M3 345mm rotors found on Competition Package (ZCP) and CSL models. Each rotor assembly weighs 17.5 lbs compared to the factory rotors' 19 lbs, significantly reducing unsprung weight and rotating mass on the front axle. Our rotor rings are machined from a proprietary high-carbon iron casting, formulated to GiroDisc's exacting specifications. This superior metallurgy ensures enhanced durability, while the 48 curved vanes act as a centrifugal pump, efficiently cooling the rotors during rigorous use. The innovative 2-piece design features a reusable hat that can be easily attached to new rings (part number D1-012) when replacement is needed. All key components, including hats, rotor rings, and drive pins, are manufactured in-house at our Bellingham, WA facility using domestically sourced materials. The hat is crafted from 6061-T6 aluminum with a black anodized finish. Drive pins, made from a high-strength steel alloy, are cadmium-plated for superior corrosion resistance. Each rotor assembly incorporates spring clips and Belleville washers, ensuring race-ready float while remaining street-friendly without noise from loose hardware. Our E46 M3 rotors are compatible with common aftermarket caliper setups, including Brembo calipers from both Porsche 996 and Megane RS swaps, in addition to the stock sliding calipers available on ZCP and CSL models. **Specifications:**- Diameter: 345mm- Thickness: 28mm- Weight: 17.5 lbs per rotor assembly We recommend replacing the rotor rings when the thickness reaches 26mm or if a crack extends to the edge of the ring. Priced and sold per pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   Introducing the GiroDisc 2-piece rotors, engineered as a direct replacement for the front rotors on the G80 M3, G82/83 M4, and G87 M2 models without carbon ceramic brakes. Our advanced 2-piece, fully floating assemblies significantly reduce unsprung weight and rotating mass from the front axle, enhancing vehicle performance. Crafted from a proprietary high-carbon iron casting, our rotor rings are meticulously machined to GiroDisc's stringent specifications. This superior metallurgy ensures exceptional durability, while the 72 curved vanes function as a centrifugal pump, effectively cooling the rotors during intense use. The innovative 2-piece design features a reusable hat that can be easily attached to new rings (part number D1-282) when replacement is necessary. All major components, including the hats, rotor rings, and drive pins, are manufactured in-house at our Bellingham, WA facility using domestically sourced materials. The hat is constructed from 6061-T6 aluminum and finished with a black anodized coating. The drive pins, made from a high-strength steel alloy, are cadmium-plated for enhanced corrosion resistance. Each rotor assembly includes spring clips and Belleville washers, ensuring race-ready float while maintaining street-friendly noise levels. We recommend replacing the rotor rings when the thickness reaches 34mm or if a crack extends to the edge of the ring. Priced and sold per pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   Our replacement rings are sold in pairs and include replacement hardware. The only parts you will reuse are your existing GiroDisc hats. Please note that unless specifically noted, GiroDisc replacement rings are only designed to work with GiroDisc hats. They are not designed to be used with other brands, including hats from cars equipped with 2-piece rotors from the factory. We recommend replacing the rotor rings when they reach a minimum thickness of 22mm or if a crack extends to the edge of the ring. These rotors are sold and priced per pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   Our replacement rings are sold in pairs and include replacement hardware. The only parts you will reuse are your existing GiroDisc hats. Please note that unless specifically noted, GiroDisc replacement rings are only designed to work with GiroDisc hats. They are not designed to be used with other brands, including hats from cars equipped with 2-piece rotors from the factory. We recommend replacing the rotor rings when they reach a minimum thickness of 22mm or if a crack extends to the edge of the ring. These rotors are sold and priced per pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   These GiroDisc 2-piece rotors are designed as direct replacements for the rear rotors found on the G80 M3, G82/83 M4, and G87 M2 models without carbon ceramic brakes. Featuring fully floating assemblies, they effectively reduce unsprung weight and rotating mass from the vehicle's axle. The rotor rings are precision-machined from a proprietary casting of high-carbon iron formulated to GiroDisc’s exact specifications. This advanced metallurgical composition ensures superior durability, while the 48 curved vanes function as a centrifugal pump, drawing air through the hub to efficiently cool the rotors during demanding conditions. The 2-piece design incorporates a reusable hat, allowing easy attachment to new rings (part number D2-282) when replacement is necessary. All key components, including hats, rotor rings, and drive pins, are manufactured in-house at our Bellingham, WA facility using domestically sourced materials. The hat is crafted from 6061-T6 aluminum and features a durable black anodized finish. Drive pins are made from a high-strength steel alloy and coated with cadmium for enhanced corrosion resistance. Rotors are assembled with spring clips and Belleville washers to ensure optimal float for racing applications, while maintaining quiet operation on the street without the risk of loose hardware. We recommend replacing the rotor rings when they reach a minimum thickness of 22mm or if a crack extends to the edge of the ring. These rotors are sold and priced per pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   Fits BMW F8x M2/M3/M4 w/ Steel Brakes This particular application is exclusively designed for M2, M3, and M4 cars equipped with blue calipers and iron rotors.If you own an M2 Competition, please refer to our front rotors specifically designed for that model.For vehicles equipped with carbon ceramic brakes, we offer direct replacement iron rotors.The Girodisc system serves as a direct replacement for the original equipment (OE) disc, requiring no modifications. It can be easily bolted onto your car and works seamlessly with OE calipers. By upgrading your brakes with lightweight high-performance replacements instead of a big brake kit, you maintain your factory bias and ABS efficiency.The central hat section of our rotor is crafted from 6061-T6 aircraft-grade aluminum sourced exclusively from the United States. The disc itself is made from our proprietary cast iron, poured and machined entirely in-house at Girodisc. Utilizing a curved vane design derived from racing technology, the rotor acts as a centrifugal pump, efficiently channeling cooling air through the disc.Our rotor and hat employ a floating mount system, featuring 10 high-strength alloy steel drive pins manufactured by Girodisc in the USA to our precise specifications. These pins are cadmium plated for long-lasting corrosion resistance and bear the load during braking while allowing axial and radial float between the hat and disc. Secured by class 12.9 cap screws with hardened washers, the pins ensure stability. To prevent noise when cold, anti-noise spring washers are installed on the rotor side, allowing the rotor to expand with heat while eliminating rattling and noise associated with floating rotors. This float also facilitates self-centering of the rotor between the pads.Once the Girodisc system is installed, simply replace the cast iron rotor when necessary.Sold and priced as a pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.   Fits BMW F8x M2/M3/M4 w/ Steel Brakes This particular application is exclusively designed for M2, M3, and M4 cars equipped with blue calipers and iron rotors.If you own an M2 Competition, please refer to our front rotors specifically designed for that model.For vehicles equipped with carbon ceramic brakes, we offer direct replacement iron rotors.The Girodisc system serves as a direct replacement for the original equipment (OE) disc, requiring no modifications. It can be easily bolted onto your car and works seamlessly with OE calipers. By upgrading your brakes with lightweight high-performance replacements instead of a big brake kit, you maintain your factory bias and ABS efficiency.The central hat section of our rotor is crafted from 6061-T6 aircraft-grade aluminum sourced exclusively from the United States. The disc itself is made from our proprietary cast iron, poured and machined entirely in-house at Girodisc. Utilizing a curved vane design derived from racing technology, the rotor acts as a centrifugal pump, efficiently channeling cooling air through the disc.Our rotor and hat employ a floating mount system, featuring 10 high-strength alloy steel drive pins manufactured by Girodisc in the USA to our precise specifications. These pins are cadmium plated for long-lasting corrosion resistance and bear the load during braking while allowing axial and radial float between the hat and disc. Secured by class 12.9 cap screws with hardened washers, the pins ensure stability. To prevent noise when cold, anti-noise spring washers are installed on the rotor side, allowing the rotor to expand with heat while eliminating rattling and noise associated with floating rotors. This float also facilitates self-centering of the rotor between the pads.Once the Girodisc system is installed, simply replace the cast iron rotor when necessary.Sold and priced as a pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits BMW F87 M2 Competition The Girodisc system is a direct replacement for the OE rotors. No modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency.The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.The rotor and hat have a floating mount system, which utilizes 12 high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.Once the Girodisc system is in place, simply replace the cast iron rotor when needed. Sold/Priced per pair.

Discovery Parts is an authorized dealer for Girodisc products and one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits BMW F8x M2/M3/M4 w/ OEM CCB The Girodisc system is a direct replacement for the OE rotors. No modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency.The central hat section of our rotor is made from strictly U.S. sourced 6061-T6 aircraft specification aluminum. The disc is made from our own proprietary cast iron, poured in the USA and machined from start to finish in house at Girodisc. The rotor utilizes a curved vane design, developed in racing to act as a centrifugal pump to force cooling air through the disc.The rotor and hat have a floating mount system, which utilizes 12 high strength alloy steel drive pins, manufactured by Girodisc in the USA to our own specifications and cadmium plated for a long lasting corrosion resistance. These pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The pins are secured by class 12.9 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self center between the pads.Once the Girodisc system is in place, simply replace the cast iron rotor when needed. Sold/Priced per pair.

Discovery Parts is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. The GiroDisc system is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Discovery Parts RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

Discovery Parts is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits BMW E9x 335I The GiroDisc system is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Discovery Parts RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.