Dynamite Friction 631-45009L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-45009L) is engineered for reliable braking performance on select Buick, Cadillac, and Pontiac models. Designed with a solid rotor construction and a directional, slotted and drilled surface, this rotor enhances heat dissipation and braking consistency.

• Compatible with Buick Bonneville, Cadillac DeVille, Park Avenue, and Seville
• Solid disc brake rotor with drilled and slotted surface
• Rust resistant zinc silver hat finish
• Directional brake surface for optimized performance
• Nominal thickness of 11.2 mm and discard thickness of 9 mm
• 5 bolt holes with 16.3 mm diameter and 118 mm bolt circle diameter
• Overall diameter of 298 mm and height of 38.8 mm

Product Line Details: DFC Brake Rotor - Drilled and Slotted - Silver

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on rotors that combine drilled holes and slots to improve brake pad bite and heat dissipation. This product line features a plain disc finish with a zinc silver coated hat to resist rust and corrosion, extending rotor life. The directional surface design supports consistent braking performance under various driving conditions.

Technical Specifications and Features

This disc brake rotor is a solid type with a 298 mm outside diameter and an overall height of 38.8 mm. It includes five bolt holes, each with a diameter of 16.3 mm, arranged on a 118 mm bolt circle diameter. The rotor’s nominal thickness is 11.2 mm, with a discard thickness of 9 mm, ensuring safe replacement intervals. The center hole diameter measures 70.9 mm, fitting securely on the vehicle hub. The rotor surface is both drilled and slotted, which helps reduce brake fade by allowing gases and debris to escape, while the directional design optimizes braking efficiency.

Applications and Problem Solving

• Replacement rotor for worn or warped rotors on Buick Bonneville, Cadillac DeVille, Park Avenue, and Pontiac Seville
• Improves heat dissipation to reduce brake fade during heavy braking
• Helps maintain consistent braking performance under wet or dusty conditions
• Addresses rotor corrosion issues with rust resistant zinc silver coating
• Supports enhanced brake pad bite and reduced brake noise

Installation Notes and Tips

Ensure the rotor surface is clean and free of oil or debris before installation. Verify the rotor thickness is above the discard thickness of 9 mm to maintain safety standards. Use the correct torque specifications for the 5 lug bolts with 16.3 mm diameter holes on a 118 mm bolt circle. The directional surface requires installation in the correct rotation direction for optimal performance. It is recommended to replace brake pads when installing new rotors to ensure even wear and braking efficiency.

Quality Assurance

Dynamite Friction manufactures this rotor to meet or exceed OEM specifications for the listed Buick, Cadillac, and Pontiac models. The rust resistant zinc silver coating on the hat extends the rotor’s service life by protecting against corrosion. While no specific warranty information is provided, the rotor’s design and materials support durability and consistent braking performance.