EBC S9KR1477 Rear Yellowstuff USR Brake Kit 90-93 Mazda Miata MX-5 NA

Vehicle Fitment

• 1990-1993 Mazda MX-5 Miata (NA chassis, 1.6L, RWD)

Fitment Notes

• Rear axle brake kit only (not front compatible)
• Designed for early NA chassis 4-lug rear brake configuration
• Not compatible with later NB or ND generation Miata models

Features

• EBC Yellowstuff high-friction performance brake pads
• USR slotted rotor design for improved heat and gas evacuation
• Anti-corrosion Geomet-coated rotor surface
• Direct-fit OEM replacement design
• Improved braking consistency under spirited driving
• Reduced brake fade compared to stock OEM rear brakes
• Chamfered and shimmed pads for reduced noise
• Pre-matched pad and rotor combination for balanced braking

Specifications

• Part Number: S9KR1477
• Position: Rear axle
• Rotor Diameter: ~231 mm (rear)
• Rotor Type: Vented/slotted USR series
• Pad Compound: EBC Yellowstuff aramid fiber
• Drivetrain: RWD
• Bolt Pattern: 4-lug NA Miata platform
• Kit Type: 2-wheel rear axle set

Included Components

• 1x Set EBC Yellowstuff rear brake pads
• 2x EBC USR slotted rear rotors
• 1x Installation hardware/lube kit (if included in EBC packaging)

Product Description

The EBC S9KR1477 is a rear axle performance brake kit designed for early Mazda MX-5 Miata NA chassis models from 1990 to 1993. It combines EBC's Yellowstuff high-friction brake pads with USR slotted rotors to deliver improved braking response, better heat management, and increased fade resistance compared to factory rear brake components.

This kit is engineered for drivers who want a noticeable upgrade in rear braking performance for spirited street driving or occasional track use. The slotted rotor design helps maintain a cleaner pad surface by removing gas, dust, and debris, while the Yellowstuff compound maintains strong bite across a wide temperature range, improving consistency during repeated stops.

As a direct-fit replacement, the S9KR1477 installs without modification on compatible NA Miata rear brake systems. It is best paired with a matching front brake upgrade to maintain balanced braking performance and optimal vehicle stability under hard braking conditions.