EBC S4KR1509 S4 Kit Redstuff Ceramic Brake Pads and USR Slotted Rotors Rear

The EBC S4KR1509 is a rear disc brake kit that pairs EBC's Redstuff ceramic sport brake pads with USR fine-slotted vented rotors for a complete performance brake upgrade. Designed for performance street driving, this kit delivers stronger stopping power, reduced brake dust, and quieter operation compared to stock brake components.

Redstuff Ceramic Brake Pads:

• Built with Aramid fiber enhanced with ceramic granules for superior braking performance
• Fully shimmed, slotted, and chamfered for ultra-quiet, fade-free stopping
• Centerline slot vents cool air to prevent thermal cracking
• Produces significantly less dust than OEM pads, keeping wheels cleaner
• Features EBC's patented Brake-In coating for fast pad seating after installation
• Higher heat threshold than EBC Greenstuff pads for demanding street use
• FMSI Pad No. D1752
• Covered by EBC's 12-month/10,000-mile warranty

USR Sport Slotted Rotors:

• Fine-slotted vented rotor design promotes silent braking and cooler operating temperatures
• Dual sets of angled slots expel heat, water, brake dust, and friction gases efficiently
• Guaranteed flat and parallel pad wear, eliminating ridges and grooves over time
• Vented center allows air to flow between rotor faces, minimizing warpage risk
• Finished with Geomet/Thermic Black anti-corrosion coating on all non-contact surfaces
• Fully balanced and run-out tested for smooth, vibration-free braking

Rotor Specifications:

• Position: Rear
• Rotor Type: Vented
• Diameter: 325mm (12.80 in.)
• Height: 38mm (1.50 in.)
• Thickness: 20mm (0.79 in.)
• Bolt Holes: 5

Installing upgraded pads at the rear requires the same level of upgrade at the front axle. The Thermic Black anti-corrosion coating on the rotors does not need to be removed prior to installation — it will naturally wear away in the pad contact area within the first 10–20 stops. Do not use brake cleaner to remove this coating, as doing so voids the EBC warranty. EBC recommends a 500-mile break-in period with moderate brake application for optimal performance.