DBA 42304S 4000 Series T3 Slotted Front Rotor for 1998-2002 Nissan Skyline R34

Vehicle Fitment

• 1998-2002 Nissan Skyline R34 25GT (ER34) - RB25DE 2.5L I6
• 1998-2002 Nissan Skyline R34 25GT-T (ER34) - RB25DET 2.5L Turbo I6

Fitment Notes

• Fits R34 models with Sumitomo 4-piston front calipers and 310mm rotors
• Does NOT fit R34 GT-R (BNR34) which uses Brembo calipers with 324mm rotors
• Production from August 1998 onward (8/98+)
• Matching rear rotor: DBA 4908S (297mm, 4000 Series T3 slotted)
• Uni-directional T3 slot pattern; left and right rotors are side-specific
• Sold individually; two required per axle
• Bolt pattern: 5x114.3mm

Features

• DBA 4000 Series T3 uni-directional slotted design
• XG150 high-carbon alloyed iron construction
• Thermal Stability Profiling (TSP) heat treatment
• Patented Kangaroo Paw ventilation (144 diamond/teardrop pillars)
• Up to 30% increase in vane surface area vs. straight vane
• Up to 20% improvement in cooling efficiency vs. straight vane
• CNC-machined tri-symmetrical T3 slots for quiet, responsive pedal feel
• Thermal Graphic Heat Paint (TGHP) for temperature monitoring
• Painted non-friction surfaces for corrosion protection

Specifications

• Part Number: 42304S
• Product Line: DBA 4000 Series T3
• Type: Slotted 1-Piece Replacement Brake Rotor
• Position: Front
• Rotor Diameter: 310mm (12.20")
• Rotor Thickness: 30mm
• Minimum Thickness: 28mm
• Hat Height: 53.75mm
• Center Bore: 68mm
• Bolt Pattern: 5x114.3mm
• Rotor Type: Vented
• Quantity: Sold Individually

Included Components

• One (1) DBA 4000 Series T3 slotted front brake rotor

Product Description

The DBA 42304S is a 4000 Series T3 slotted front brake rotor engineered for the 1998-2002 Nissan Skyline R34 GT and GT-T equipped with Sumitomo front calipers. Cast from DBA's proprietary XG150 high-carbon alloyed iron and heat treated through Thermal Stability Profiling, this rotor handles extreme braking temperatures without fade or distortion. The patented Kangaroo Paw internal ventilation system uses 144 diamond and teardrop-shaped pillars to increase cooling vane surface area by up to 30% and improve airflow efficiency by up to 20% over conventional straight vane designs. DBA's CNC-machined tri-symmetrical T3 slot pattern provides multiple exit points for brake dust and gases, delivering quieter operation, smoother pedal feel, and consistent pad contact under all driving conditions. Thermal Graphic Heat Paint on the rotor face changes color at specific temperature thresholds to help monitor braking temperatures. A direct bolt-on replacement for the factory rotor with no modifications required. Sold individually.