Dynamite Friction 631-40103L Disc Brake Rotor - Rear Left

Dynamite Friction Rear Left Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver is a rear left disc brake rotor built for select Dodge Ram heavy-duty applications. It combines a vented rotor design with a slotted X drilled surface and a zinc silver hat finish for a clean look and added corrosion resistance.

Fits 2006-2008 Dodge Ram 1500, rear left, with 8 lug wheels and Mega Cab configuration. Fits 2003-2008 Dodge Ram 2500, rear left. Fits 2003-2008 Dodge Ram 3500, rear left.

Key Features

• Part number 631-40103L for rear left fitment
• Slotted X drilled braking surface for consistent pad contact
• Vented rotor construction for heat management
• Rust resistant coating with zinc silver hat finish
• Plain disc finish with directional brake surface
• 8 bolt hole and 8 stud/lug hole design
• Outside diameter: 352.5 mm
• Nominal thickness: 30 mm; discard thickness: 28.39 mm

Detailed Description

This DFC brake rotor is engineered for rear left service on Dodge Ram 1500, Ram 2500, and Ram 3500 models listed in the fitment data. The drilled and slotted rotor face helps maintain pad bite, while the vented design supports heat dissipation during repeated braking. The silver zinc hat finish and rust resistant coating add protection in exposed undercarriage conditions, making this rotor a practical choice for truck owners replacing a worn rear rotor.

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver, part number 631-40103L, is sized with a 352.5 mm outside diameter, 123 mm center hole diameter, and 165.1 mm bolt circle diameter. Its directional braking surface and 8-lug pattern align with the specified Dodge Ram rear left applications.

What This Rotor Helps Address

• Brake pulsation from a worn or uneven rear rotor surface
• Reduced braking consistency caused by heat buildup
• Surface corrosion on exposed rotor and hat areas
• Pad glazing or uneven pad contact on the rear axle
• Replacement needs for a damaged rear left rotor on Ram trucks

Installation Notes and Tips

Verify rear left position, lug count, and wheel configuration before installation. Confirm rotor dimensions against the existing part, including outside diameter, center hole diameter, and bolt circle diameter. Because this rotor uses a directional braking surface, install it in the correct orientation for the left rear side. Inspect pads, caliper hardware, and hub condition during replacement to help ensure even braking performance.

Quality Assurance

Dynamite Friction supplies this rotor as a fitment-specific replacement for the listed Dodge Ram applications. Part number 631-40103L is built to match the dimensional and mounting requirements shown in the product data for accurate service selection.