Dynamite Friction 631-31170D Disc Brake Rotor - Rear Left

Overview of the DFC Brake Rotor - Drilled and Slotted - Silver

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver offers reliable braking performance for select BMW and Toyota models. Designed with a directional slotted and drilled surface, this rotor enhances heat dissipation and braking consistency under demanding conditions.

• Part Number: 631-31170D
• Disc Brake Rotor with drilled and slotted surface
• Outside Diameter: 330 mm
• Rust resistant zinc silver hat finish
• Plain disc finish with directional braking surface
• Discard thickness: 18.4 mm

Product Line Details

The DFC Brake Rotor - Drilled and Slotted - Silver is part of Dynamite Friction's DFC line, which focuses on rotors engineered for improved thermal management and consistent braking performance. The drilled and slotted design helps reduce brake fade by allowing gases and debris to escape, while the zinc silver coating on the hat provides corrosion resistance to extend rotor life.

Technical Description and Features

This disc brake rotor features a 330 mm outside diameter and a discard thickness of 18.4 mm, ensuring compatibility with specific BMW and Toyota vehicles. The rotor surface is both drilled and slotted in a directional pattern, which improves water and dust evacuation from the braking surface. The plain disc finish combined with a zinc silver rust-resistant coating on the hat enhances durability and corrosion resistance, making it suitable for various driving conditions.

Compatible Vehicles and Applications

• Compatible with BMW 230i, 230i xDrive, 330e, 330e xDrive, 330i, 330i xDrive, 430i, 430i Gran Coupe, 430i xDrive, 430i xDrive Gran Coupe, 530e, 530e xDrive, 530i, 530i xDrive, iX3, X3, X4, and Z4 models
• Compatible with Toyota GR Supra
• Designed for use in disc brake systems requiring directional drilled and slotted rotors

Common Issues Addressed by This Rotor

• Brake fade caused by excessive heat buildup during aggressive driving
• Corrosion and rust on rotor hats reducing rotor lifespan
• Poor water and debris evacuation leading to inconsistent braking
• Uneven brake pad wear due to inefficient rotor surface design
• Reduced braking performance in wet or dusty conditions

Installation Notes and Tips

Ensure the rotor is installed with the directional surface oriented correctly according to the vehicle’s rotation direction. Verify that the discard thickness of 18.4 mm is not exceeded during rotor replacement. Clean the rotor surface before installation to remove any protective coatings or contaminants. Use proper torque specifications for lug nuts to avoid rotor warping.

Quality Assurance

Dynamite Friction manufactures the 631-31170D rotor to meet OEM specifications for fitment and performance. The rust-resistant zinc silver coating and precision machining contribute to consistent braking and extended rotor life. Warranty information is available through the manufacturer or authorized distributors.