The EBC GD1845 is a front GD Sport slotted and dimpled brake rotor from EBC's third-generation GD series, sized for the 3.0 supercharged Audi A6 Quattro. The wide aperture slots pull cooler air into the pad-to-rotor contact zone and help clear gas, dust, and water from the braking surface. The dimpled face handles pad degassing without through-drilled holes, which the manufacturer says avoids the crack risk that drilling introduces. Each disc is machined in the UK from R90-certified blanks and finished with a silver corrosion-resistant coating.
The case for these over stock rotors is heat management during repeated hard stops. The manufacturer ties the slot design to lower pad-contact temperatures, which reduces fade on fast road runs, mountain descents, and track sessions, while also promoting more even pad wear. The UK machining and corrosion-protective finish are the manufacturer-stated quality points to weigh against cheaper generic slotted discs. Owners on user forums report that these rotors can take a while to arrive from the UK, so plan your timeline around that.
Fitment centers on the C7-generation A6 Quattro with the 3.0 supercharged engine. Owners on user forums say the 3.0T uses larger front discs than the smaller-engine cars, and the C7 platform has several disc sizes, so confirm your brake code and rotor specification before ordering. Front rotors are held by a small Torx retaining screw, but replacing them usually means removing the caliper carrier. Owners on user forums cite roughly 196 Nm for the carrier bolts and recommend replacing those bolts rather than reusing them. Searches for "C7 A6 3.0T front rotors," "GD1845 install," and "A6 quattro slotted dimpled rotor" will lead you to this part.
No. The manufacturer's design uses wide slots and dimples rather than through-drilled holes, which the manufacturer says reduces the crack risk associated with drilled discs.
Owners on user forums say the front carrier bolts are torque-to-yield style fasteners that should be replaced rather than reused, and they cite about 196 Nm for tightening. Confirm the specification with the manufacturer or the service manual before installing.
The manufacturer states that GD Sport rotors are fully machined in the United Kingdom from R90-certified blanks, most of which are cast in the EU.
Rotor replacement on this platform is a moderate-difficulty job for a home mechanic with a torque wrench. Owners on user forums typically list a 22 mm socket for the carrier bolts, a breaker bar, a 9 mm hex bit (a standard-length bit may not reach), a Torx bit for the rotor screw, a flathead screwdriver, a caliper piston compressor, brake grease, and a little thread locker for the guide pin bolts. Forum posts disagree on the exact Torx size for the rotor retaining screw, so check the size on your car before you start. Common gotchas include rotors seized to the hub from corrosion, which owners free with penetrant and a rubber mallet, and the need to remove the carrier rather than just the guide pins when replacing rotors. Torque the caliper-to-carrier bolts to about 30 Nm and the carrier bolts to the specified value, and bed the new pads and rotors in after installation.
