The DBA 4000 Series Slotted Rotor Part Number DBA4979S is a high-performance replacement brake rotor designed specifically for BMW 3 Series models from 1998 to 2000, including 318i, 318ti, 323i, 323Ci, and 328i. Crafted from XG-150 high carbon alloyed iron, this rotor offers exceptional thermal stability and durability under intense braking conditions. The rotor’s thermal stability profiling ensures consistent performance even during prolonged or aggressive driving, making it ideal for street use, light utility vehicles, and spirited driving scenarios. Featuring DBA’s patented Kangaroo Paw ventilation system with 144 diamond and teardrop-shaped pillars, the rotor provides up to a 30% increase in surface area and a 20% improvement in cooling efficiency over traditional straight vane designs, helping reduce brake fade and extend rotor lifespan.
The 4000 Series T3 design incorporates innovative bi-directional slot technology with CNC-machined tri-symmetrical slots that enhance responsiveness and reduce brake pedal fade. The T3 slots facilitate efficient escape of brake pad gases and friction dust, resulting in consistent, smooth, and responsive braking performance. This design eliminates the need for left and right-specific rotors, simplifying installation and ensuring optimal performance for both street and track applications. The rotor features thermo-graphic paint markings for easy heat assessment and moisture-proof packaging to prevent corrosion during storage.
Built for direct replacement, these rotors are suitable for a wide variety of performance applications, from daily driving to rally and track days. The high-quality materials and advanced design provide reliable stopping power, enhanced cooling, and increased durability, making the DBA 4000 Series Slotted Rotor a top choice for enthusiasts and professional drivers alike. With no need for additional modifications, these rotors are a perfect upgrade for BMW owners seeking improved braking performance and safety.
Features:
- Constructed from XG-150 high carbon alloyed iron for durability and thermal stability
- Patented Kangaroo Paw ventilation system with 144 diamond and teardrop pillars for superior cooling
- T3 bi-directional slot design with CNC-machined tri-symmetrical slots for responsiveness and smooth pedal feel
- Enhanced surface area and cooling efficiency for reduced brake fade
- Thermo-graphic paint markings for heat monitoring
- Moisture-proof corrosion protection packaging
- Direct replacement fitment for BMW 3 Series models from 1998 to 2000
Fitment:
BMW 318i Base 1998
BMW 318ti Base 1998 to 1999
BMW 323Ci Base 2000
BMW 323i Base 1998 to 2000
BMW 323is Base 1998 to 1999
BMW 328i Base 1998 to 1999
BMW 328is Base 1998 to 1999
BMW Z3 Coupe 1999 to 2002
BMW Z3 M Coupe 1999 to 2002
BMW Z3 M Roadster 1998 to 2002
BMW Z3 Roadster 1998 to 2002
BMW Z4 2.5i 2003 to 2005
BMW Z4 3.0i 2003 to 2005
BMW Z4 Coupe 3.0si 2006
BMW Z4 M Coupe 2006
BMW Z4 M Roadster 2006
BMW Z4 Roadster 3.0i 2006



















