Dynamite Friction 633-31090L Disc Brake Rotor - Rear Left

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Black (part number 633-31090L) is engineered for BMW 135i and 135is models. This vented disc brake rotor combines drilled and slotted surface features with a rust-resistant zinc black hat finish to enhance braking performance and durability.

• Compatible with BMW 135i and 135is models
• Directional, vented disc brake rotor with drilled and slotted surface
• Nominal thickness of 21.8 mm and discard thickness of 20.4 mm
• Overall diameter of 324 mm and height of 77.5 mm
• Rust-resistant zinc black coating on the hat for corrosion protection
• 5 bolt holes with 14.7 mm diameter and 120 mm bolt circle diameter

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

The DFC Brake Rotor - Drilled and Slotted - Black line by Dynamite Friction is designed to provide enhanced heat dissipation and improved braking response. The drilled holes and slots on the rotor surface help reduce brake fade by allowing gases and debris to escape, while the vented rotor design promotes airflow to maintain optimal operating temperatures. The zinc black finish on the rotor hat offers additional corrosion resistance, extending the rotor's service life under various driving conditions.

Technical Specifications and Features

This disc brake rotor features a nominal thickness of 21.8 mm and a discard thickness of 20.4 mm, ensuring reliable performance throughout its service life. The rotor's outside diameter measures 324 mm, with an overall height of 77.5 mm. It includes five bolt holes, each with a diameter of 14.7 mm, arranged on a 120 mm bolt circle diameter, matching the BMW 135i and 135is wheel hub specifications. The rotor surface is directional, combining drilled and slotted patterns to optimize braking efficiency and reduce heat buildup. The vented rotor design further enhances cooling during heavy braking.

Applications and Problem Solving

• Reduces brake fade during aggressive driving or track use
• Improves water and debris evacuation for consistent braking in wet conditions
• Minimizes rotor warping by enhancing heat dissipation
• Protects against rust and corrosion with zinc black coated hat
• Restores braking performance on BMW 135i and 135is vehicles with worn or damaged rotors

Installation Notes and Tips

• Ensure compatibility with BMW 135i and 135is models before installation
• Check rotor thickness and discard limits to confirm replacement necessity
• Use proper torque specifications for the 5 bolt holes (14.7 mm diameter) on the 120 mm bolt circle
• Inspect brake pads for wear and replace if necessary to maximize rotor performance
• Follow manufacturer guidelines for bedding-in new rotors to ensure optimal braking

Quality Assurance and Warranty

Dynamite Friction manufactures the 633-31090L rotor to meet or exceed OEM standards for fit, form, and function. The rust-resistant coating and vented design contribute to long-term durability. Warranty details should be confirmed with the point of purchase or manufacturer documentation.