HomeBrake > Drums and RotorsDynamite Friction 631-40118L Disc Brake Rotor - Rear Left
Part #: 631-40118L

Dynamite Friction 631-40118L Disc Brake Rotor - Rear Left

DFC Brake Rotor - Drilled and Slotted - Silver, Rear Left
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OE Direct Replacement — Bolt-on fit, no modifications needed
DFC Brake Rotor - Drilled and Slotted - Silver, Rear Left
Fitment: Dodge and Ram, 2500, 3500, 4000, Ram 2500, and Ram 3500
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Dynamite Friction DFC Brake Rotor

The Dynamite Friction DFC Brake Rotor - Drilled and Slotted - Silver (part number 631-40118L) is engineered for reliable braking performance on Dodge Ram 2500 and Ram 3500 models. This vented disc brake rotor features a directional, slotted and drilled surface designed to enhance heat dissipation and maintain consistent stopping power under demanding conditions.

  • Compatible with Dodge Ram 2500, Ram 3500, and Ram 4000 models
  • Directional slotted and drilled surface for improved brake pad bite and heat management
  • Vented rotor design to reduce brake fade during heavy use
  • Zinc silver hat finish with rust-resistant coating for extended durability
  • Nominal thickness of 34 mm with discard thickness at 32.4 mm
  • Eight bolt holes with 16.8 mm diameter and 165 mm bolt circle diameter
  • Overall rotor diameter of 358 mm and height of 125 mm

Details on the DFC Brake Rotor - Drilled and Slotted - Silver Line

The DFC Brake Rotor - Drilled and Slotted - Silver line from Dynamite Friction focuses on rotors that combine drilled holes and precision slots to optimize braking efficiency. This product line is designed to provide enhanced cooling and debris removal from the rotor surface, which helps maintain consistent brake performance. The silver zinc coating on the rotor hat offers corrosion resistance, making it suitable for trucks like the Dodge Ram 2500 and Ram 3500 that often operate in harsh environments.

Technical Specifications and Features

This disc brake rotor is vented to allow air flow between the rotor surfaces, reducing heat buildup during braking. The directional slotted and drilled surface improves pad contact and helps evacuate gases and dust, which can otherwise reduce braking effectiveness. The rotor measures 358 mm in outside diameter with a height of 125 mm, fitting the specified Dodge Ram models precisely. The zinc silver finish on the hat and rust-resistant coating extend the rotor's service life by protecting against corrosion.

Applications and Problem Solving

  • Replacement rotor for worn or warped brake rotors on Dodge Ram 2500 and Ram 3500 trucks
  • Improves heat dissipation to reduce brake fade during towing or heavy hauling
  • Helps maintain consistent braking performance in wet or dusty conditions
  • Addresses rotor surface glazing and brake pad chatter issues
  • Prevents premature rotor corrosion in environments exposed to moisture and road salt

Installation Notes and Tips

Ensure the rotor surface is clean and free of any protective coatings before installation. Verify the rotor thickness is above the discard thickness of 32.4 mm to maintain safe braking performance. Use the correct torque specifications for the eight 16.8 mm bolt holes on the 165 mm bolt circle diameter. This rotor is directional; install with the correct orientation to optimize slot and drill pattern effectiveness.

Quality Assurance and Warranty

Dynamite Friction manufactures this rotor to meet or exceed OEM specifications for Dodge Ram 2500 and Ram 3500 vehicles. The rust-resistant coating and zinc silver hat finish contribute to long-term durability. Please refer to Dynamite Friction's warranty policy for specific coverage details related to the 631-40118L part number.

BrandDynamite Friction
Part Number631-40118L
PositionDFC Brake Rotor - Drilled and Slotted - Silver, Rear Left
Discard Thickness32.4
Nominal Thickness34
Bolt Hole Diameter16.8
Disc FinishPlain
Hat FinishZinc silver
Rust Resistant CoatingYes
Bolt Hole Quantity8
Overall Height125
Outside Diameter358
Height125
Surface TypeSlotted x drilled
Solid Or Vented Type RotorVented
Center Hole Diameter123
Stud/Lug Hole Quantity8
Stud/Lug Hole Diameter16.8
Directional or Non-Directional Brake SurfaceDirectional
Bolt Circle Diameter165
Stud/Lug Hole Circle Diameter165

This part fits 50 vehicles. Search below:

YearMakeModelFuel TypePositionNotes
2025Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2025Ram3500DIESELRear Left11.5 inch Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2024Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2024Ram3500DIESELRear Left11.5 inch Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2023Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2023Ram3500DIESELRear Left11.5 inch Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2022Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2022Ram3500DIESELRear LeftSRW; Standard Output Transmission; 11.5" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2022Ram3500DIESELRear LeftSRW; High Output HD Transmission; 12" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2022Ram3500GASRear LeftBrake Hydraulic Hose: SRW; DFC Brake Rotor - Drilled and Slotted - Silver
2021Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2021Ram3500DIESELRear LeftSRW; Standard Output Transmission; 11.5" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2021Ram3500DIESELRear LeftSRW; High Output HD Transmission; 12" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2021Ram3500GASRear LeftBrake Hydraulic Hose: SRW; DFC Brake Rotor - Drilled and Slotted - Silver
2020Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2020Ram3500DIESELRear LeftSRW; Standard Output Transmission; 11.5" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2020Ram3500DIESELRear LeftSRW; High Output HD Transmission; 12" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2020Ram3500GASRear LeftBrake Hydraulic Hose: SRW; DFC Brake Rotor - Drilled and Slotted - Silver
2019Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2019Ram3500DIESELRear LeftSRW; Standard Output Transmission; 11.5" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2019Ram3500DIESELRear LeftSRW; High Output HD Transmission; 12" Rear Axle; DFC Brake Rotor - Drilled and Slotted - Silver
2019Ram3500GASRear LeftBrake Hydraulic Hose: SRW; DFC Brake Rotor - Drilled and Slotted - Silver
2018Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2018Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2018Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2017Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2017Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2017Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2016Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2016Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2016Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2015Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2015Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2015Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2014Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2014Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2014Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2013Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2013Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2013Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2012Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2012Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2012Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2011Ram2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2011Ram3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2011Ram4000Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2010DodgeRam 2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2010DodgeRam 3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2009DodgeRam 2500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver
2009DodgeRam 3500Rear LeftDFC Brake Rotor - Drilled and Slotted - Silver

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.