Dynamite Friction 631-31053L Disc Brake Rotor - Rear Left

Overview of DFC Brake Rotor - Drilled and Slotted - Silver

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-31053L) is engineered for BMW 330Ci, 330i, and 330xi models. This vented disc brake rotor features a directional, slotted, and drilled surface designed to enhance braking performance and heat dissipation.

• Compatible with BMW 330Ci, 330i, and 330xi
• Part number 631-31053L
• Vented disc brake rotor with drilled and slotted surface
• Nominal thickness: 21.8 mm; discard thickness: 20.4 mm
• Outside diameter: 320 mm; overall height: 60.5 mm
• 5 bolt holes with 14.7 mm diameter; bolt circle diameter: 120 mm
• Zinc silver hat finish with rust-resistant coating
• Directional brake surface for optimized performance

Detailed Product Features and Specifications

This DFC Brake Rotor - Drilled and Slotted - Silver is constructed with a vented design to improve airflow and reduce heat buildup during braking. The rotor measures 320 mm in outside diameter and 60.5 mm in overall height, ensuring proper fitment and clearance for the specified BMW models. The nominal thickness of 21.8 mm and discard thickness of 20.4 mm provide clear service limits for maintenance.

The rotor surface is both drilled and slotted, which helps to evacuate gases, dust, and water, improving braking consistency and reducing brake fade. The directional surface design is intended to optimize the rotor’s performance when installed in the correct orientation. The hat section features a zinc silver finish with a rust-resistant coating to help prevent corrosion and extend rotor life.

DFC Brake Rotor - Drilled and Slotted - Silver Product Line

The DFC Brake Rotor - Drilled and Slotted - Silver line from Dynamite Friction focuses on rotors that combine drilled holes and slots with a vented design. This combination is aimed at enhancing heat dissipation and maintaining braking efficiency under demanding conditions. The silver zinc coating on the hat provides additional protection against rust, making these rotors suitable for drivers seeking reliable performance and durability on BMW 330 series vehicles.

Applications and Problem Solving

• Improves braking performance for BMW 330Ci, 330i, and 330xi models
• Reduces brake fade caused by heat buildup during aggressive driving
• Helps prevent rotor warping and uneven wear
• Minimizes brake dust and gas buildup for consistent pedal feel
• Protects against rust and corrosion to extend rotor lifespan

Installation Notes and Tips

• Ensure rotor orientation matches the directional surface marking for optimal performance
• Check rotor thickness before installation; replace if below discard thickness of 20.4 mm
• Clean rotor surface before installation to remove any protective coatings or contaminants
• Verify bolt hole alignment with vehicle hub using the 5-bolt pattern and 120 mm bolt circle diameter
• Torque lug nuts to manufacturer specifications to avoid rotor damage

Quality Assurance and Warranty

Dynamite Friction manufactures the 631-31053L rotor to meet strict quality standards for fitment and performance on BMW 330Ci, 330i, and 330xi models. The rust-resistant zinc silver coating and vented rotor design contribute to durability and consistent braking. Warranty details are provided by Dynamite Friction and should be confirmed at the time of purchase.