EBC USR643 Rear Slotted Brake Rotors for 90-94 Mazda Miata MX-5 1.6

Vehicle Fitment

• 1990-1994 Mazda MX-5 Miata (Rear, RWD, 1.6L I4)

Features

• USR series slotted rear brake rotors engineered for improved heat and debris management
• Fine narrow slots help expel brake dust, water, and gases for more consistent pad contact
• Precision machined from high-quality grey iron for strength and durability
• Thermic/black dash coating provides corrosion resistance on non-contact areas
• Narrow slot design reduces wind noise compared to many aggressive rotor patterns
• Designed to help maintain flat and parallel pad wear for longer service life
• Direct OE replacement fit - installs with existing calipers and hardware
• Ideal for daily driving and spirited street use where improved performance over OEM is desired

Specifications

• Position: Rear brake rotors (pair)
• Rotor Diameter: 231 mm (9.1 in)
• Rotor Thickness New: 9 mm
• Minimum Thickness: 8 mm
• Bolt Pattern: 4 lug, 100 mm PCD
• Rotor Height: 35 mm
• Center Hole Diameter: 54 mm
• Rotor Style: Solid one-piece slotted design

Included Components

• 2x EBC USR643 rear slotted brake rotors

Product Description

The **EBC USR643 Rear Slotted Brake Rotors** are performance-oriented replacement rotors designed specifically for the rear brake system of the **1990-1994 Mazda MX-5 Miata** with the 1.6 L inline-4 engine and rear-wheel-drive layout. These USR series rotors feature a fine slot pattern that helps channel heat, brake dust, water, and gases away from the pad-to-rotor contact area, maintaining consistent braking performance and helping reduce fade compared to plain rotors. Their precision-machined grey iron construction and thermic black anti-rust coating enhance durability and resist corrosion.

Sold as a pair, these rear slotted rotors install using your vehicle's existing calipers and hardware with no modifications required. The narrow slot design balances improved performance with quieter operation and extended pad life versus some aggressive slot patterns, making them a solid choice for daily drivers and enthusiasts alike who want an upgrade over stock rear rotors. For balanced braking performance, consider pairing with suitably matched performance brake pads.