StopTech 121.33137 Plain Sport Disc Brake Rotor - Rear

The StopTech 121.33137 is a plain, smooth-faced Sport disc brake rotor designed as a direct OEM replacement for factory brake systems. Part of StopTech's Sport Rotor lineup, this rear rotor is produced from a high-quality Centric Parts blank casting and precision-machined to meet or exceed original equipment specifications.

The plain rotor surface provides consistent, even pad contact for smooth, predictable stopping performance. A durable black e-coating is applied to non-friction surfaces — including the hat, cooling vanes, and outer edge — to protect against rust and corrosion during break-in and throughout the rotor's service life. High-carbon metallurgy in the iron casting delivers quieter operation, improved crack resistance, and enhanced thermal stability compared to standard economy rotors.

Key Features:

• Plain/Smooth rotor surface — consistent pad bed-in and quiet, fade-resistant braking
• High-carbon iron casting — quieter operation, better crack resistance, and improved performance over standard rotors
• Black e-coat finish — corrosion protection on all non-friction surfaces
• Vented construction — internal cooling vanes dissipate heat for sustained braking performance
• 1-piece direct replacement — bolt-on fitment compatible with factory calipers and hardware
• Produced from Centric Parts blank casting — quality foundation shared across StopTech's Sport Rotor family

The StopTech 121.33137 is the ideal upgrade for drivers seeking improved durability and consistent performance over a stock rotor, without the aggressive styling of drilled or slotted variants. Cross-reference part numbers in the same fitment family include 120.33137, 125.33137, 126.33137SL/SR, 127.33137L/R, and 128.33137L/R.