Dynamite Friction 631-31021L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31021L) is engineered for BMW 735i and 735iL models. This solid disc brake rotor features a directional, slotted and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 735i and 735iL vehicles
• Part number 631-31021L for precise identification
• Solid rotor with drilled and slotted surface for improved cooling
• Directional brake surface to optimize braking efficiency
• Rust resistant zinc silver hat finish for durability
• Nominal thickness of 12 mm with discard thickness at 10.4 mm
• Five bolt holes with 15 mm diameter and 120 mm bolt circle diameter
• Overall diameter of 300 mm and height of 68.1 mm

Detailed Product Description

This DFC Brake Rotor - Drilled and Slotted - Silver from Dynamite Friction is designed specifically for BMW 735i and 735iL models, ensuring a precise fit and reliable performance. The rotor is solid rather than vented, providing consistent braking feel. Its slotted and drilled surface helps to reduce brake fade by allowing gases and debris to escape, while also improving heat dissipation during heavy braking. The directional design of the brake surface ensures optimal contact with brake pads, enhancing stopping power and pedal response.

The rotor features a plain disc finish combined with a zinc silver rust-resistant coating on the hat, which helps protect against corrosion and extends the rotor's service life. With a nominal thickness of 12 mm and a discard thickness of 10.4 mm, this rotor meets strict wear standards. The five bolt holes, each 15 mm in diameter, and a bolt circle diameter of 120 mm ensure secure mounting on compatible BMW models.

DFC Brake Rotor - Drilled and Slotted - Silver Product Line

The DFC Brake Rotor - Drilled and Slotted - Silver line by Dynamite Friction focuses on delivering rotors with enhanced heat management and durability. The drilled and slotted design is intended to improve braking performance under demanding conditions by facilitating better heat dissipation and debris removal. This product line is suitable for drivers seeking reliable replacement rotors that maintain consistent braking characteristics for BMW 735i and 735iL vehicles.

Common Applications and Problem Solving

• Replacement for worn or warped rotors on BMW 735i and 735iL
• Improves brake cooling to reduce fade during aggressive driving
• Helps eliminate brake noise caused by glazing or debris buildup
• Restores braking performance affected by rotor surface damage
• Prevents rust and corrosion with zinc silver coated hat finish

Installation Notes and Tips

Ensure the rotor thickness is above the discard thickness of 10.4 mm before installation. Clean the rotor surface to remove any protective coatings or contaminants prior to mounting. Use the correct torque specifications for the five 15 mm bolt holes arranged on a 120 mm bolt circle diameter. Verify compatibility with BMW 735i and 735iL models to ensure proper fitment and performance.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet OEM specifications for fit and function. The rust-resistant zinc silver coating on the hat enhances durability against corrosion. While specific warranty details are not provided, Dynamite Friction products typically adhere to industry standards for quality and reliability.