Dynamic Friction Company Disc Brake Rotor P/N:604-31018

Bring smooth, confident stops back to your BMW's rear axle with the Dynamic Friction brake rotor 604-31018 (also written 60431018), a DFC GEOSPEC coated blank rotor that installs as a rear replacement across a range of 3-series models — including the 1984-1987 325E, 1986-1988 325, 1986-1987 325ES, 1987-1991 325i and 325is, plus the 1991 318i, 318is, and 325iX. See the Buyer's Guide tab for the full list and engine-level fitment.

• OE vane configuration: the vented casting matches the original vane layout to promote proper heat dissipation.
• CNC-machined & mill-balanced: 100% precision cut and mill-balanced for smoother stops and reduced vibration.
• GEOSPEC coating: provides corrosion protection beyond zinc or conventional painting.
• Premium iron castings: engineered with G3000/G11H18 iron castings for strength and stability.

The non-directional finish promotes faster pad break-in, and the rotor arrives ready to install with no additional pre-degreasing preparation needed. As a blank rotor it has no drilling or slotting, and it is designed to meet the same form, fit, and function as OEM brake rotors. Rear rotors wear together, so replacing both sides as a matched set helps keep braking even and balanced — this listing is for one rotor, sold individually.