Dynamite Friction 7004-31021 Disc Brake Rotor Set - Front and Rear

Drilled and Slotted Brake Rotors for BMW

Dynamite Friction DFC Rotors-Drilled and Slotted-Silver, part number 7004-31021, are front and rear disc brake rotors built for select BMW 320i, 323Ci, 323i, and 328i applications. This rotor set is engineered for drivers who want OE-style fitment with added braking response from a drilled and slotted design.

For BMW 320i, BMW 323Ci, BMW 323i, and BMW 328i brake rotor replacement, 7004-31021 combines performance-focused surface design with cast-iron construction and precision machining.

Key Features

• Drilled holes help reduce heat buildup during repeated braking
• Slots clear brake dust and road debris from the rotor surface
• Designed to improve pad bite and reduce pad glazing
• G3000/G11H18 cast iron construction for durability and stability
• Non-directional finish supports faster, more even pad bed-in
• 100% inspected for balance and critical dimensions
• GEOSPEC coating helps match OEM-style corrosion protection

Product Details

The DFC Rotors-Drilled and Slotted-Silver line is positioned as a performance-oriented rotor family with OE-spec engineering. Each casting is machined to tight tolerances, then finished to promote quieter, smoother stops and consistent pad contact. The silver-coated surface and vented-rotor inspection process add a practical layer of durability for daily driving and spirited use.

Part number 7004-31021 is a direct-fit disc brake rotor set for 1996-1999 BMW 328i, 1998-2000 BMW 323i, 2000 BMW 323Ci, and 2001-2005 BMW 320i in front and rear positions.

Common Brake Issues This Rotor Set Can Address

• Brake fade from heat buildup during repeated stops
• Reduced initial pad bite on worn or glazed rotors
• Brake noise caused by uneven rotor surfaces
• Vibration from rotors that are out of balance or out of spec
• Debris buildup that affects consistent braking performance

Installation Notes

Verify rotor diameter, axle position, and vehicle year before installation. Clean the hub mounting surface thoroughly and inspect pads, calipers, and hardware condition before fitting new rotors. After installation, follow a proper brake pad bed-in procedure to help achieve even transfer and stable braking performance.

Quality Assurance

DFC Premium Performance Brake Rotors are machined to OE specifications and undergo 100% inspection for balance and critical attributes. The part is backed by a 12 month or 12,000 mile limited warranty against defects in material and workmanship.