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High-Capacity Rear Braking for the 2011-2019 Ram 1500: Rotora HD RamDS-380x32 HD Challenge Rear Brake System
The HDRamDS-380x32 HD Challenge Rear Brake System brings an upgraded 380x32mm two-piece floating rotor and RG404 4-piston monoblock caliper to the rear axle of the 2011-2019 Ram 1500 Classic (DS platform). Larger than the 355x32 rear option, the HDRamDS-380x32 provides additional rotor mass for improved thermal capacity under heavy or repeated braking loads. This kit retains OEM brake lines and installs without cutting or fabrication.
Key Features
- 380x32mm two-piece floating disc rotor with aluminum hat
- RG404 forged 4-piston monoblock caliper
- Black powder-coated hat on all color variants
- 10 caliper color options: Zinc, Red, White, Yellow, Orange, Green, Light Blue, Blue, Silver, Black
- Slotted or Cross-Drilled disc pattern available
- Direct-fit OEM bracket replacement
- OEM brake lines retained on this rear kit
- Street, Street-Track, and Track-Race capable
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2011-2019 | Ram | 1500 |
Specifications
| Detail | Value |
|---|---|
| MPN | HDRamDS-380x32 |
| Brand | Rotora |
| Axle Position | Rear |
| Rotor Size | 380x32mm |
| Rotor Type | 2-Piece Floating |
| Caliper Model | RG404 |
| Piston Count | 4-Piston Monoblock |
| Hat Color | Black |
| Brake Lines | OEM lines retained |
| Condition | New |
| UPC | See product label |
What's Included
- 2x 380x32mm two-piece floating rotors (rear pair)
- 2x RG404 4-piston monoblock calipers
- Caliper mounting brackets
- Hardware and installation hardware kit
- Rotora instruction sheet
About Rotora
Rotora designs and manufactures high-performance brake systems for street, street-track, and track applications. The HD Challenge series for Ram trucks delivers serious stopping power with fitment-specific engineering and broad color customization options.
Frequently Asked Questions
What is the HDRamDS-380x32?
The HDRamDS-380x32 is a complete rear big-brake kit for the 2011-2019 Ram 1500 featuring a 380x32mm two-piece floating rotor and RG404 4-piston monoblock caliper from Rotora's HD Challenge series.
Does the HDRamDS-380x32 include stainless steel brake lines?
No. The HDRamDS-380x32 rear kit retains OEM brake lines. This is a design characteristic of the DS platform rear configuration.
What is the difference between the HDRamDS-380x32 and HDRamDS-355x32?
The HDRamDS-380x32 uses a larger 380x32mm rotor compared to the 355x32mm rotor in the HDRamDS-355x32, providing greater thermal mass. The HDRamDS-380x32 also uses the RG404 caliper vs the RG403. Choose the 380x32 for heavier towing or more aggressive track use.
Is the HDRamDS-380x32 a direct fit for my 2011-2019 Ram 1500?
Yes. The HDRamDS-380x32 is engineered as a direct-fit rear brake kit for the Ram 1500 DS platform spanning 2011 through 2019. No cutting, welding, or fabrication required.
What caliper colors are available on the HDRamDS-380x32?
Ten colors are offered: Zinc (standard, no upcharge), Red, White, Yellow, Orange, Green, Light Blue, Blue, Silver, and Black. Non-Zinc colors carry a per-axle upcharge.
Will the HDRamDS-380x32 clear my 20-inch wheels?
The HDRamDS-380x32 is designed for 20-inch and larger wheels. Verify clearance with your specific wheel and brake setup before ordering.
Can the HDRamDS-380x32 be used for towing applications?
Yes. The larger rotor size of the HDRamDS-380x32 increases thermal capacity, making it suitable for trucks regularly used for towing and hauling heavy loads.
What brake pads are recommended for the HDRamDS-380x32?
Rotora recommends using their matched performance brake pads for the HDRamDS-380x32 to ensure optimal pad-to-rotor bedding and consistent performance across street and track conditions.
Installation Instructions
- Safely lift the vehicle and remove the rear wheels.
- Remove the factory rear caliper, bracket, and rotor.
- Install the HDRamDS-380x32 caliper mounting bracket using supplied hardware.
- Mount the 380x32mm two-piece rotor onto the rear hub.
- Install the RG404 4-piston caliper and torque to specification.
- Reconnect OEM brake lines.
- Bleed the rear brake circuit thoroughly.
- Reinstall wheels and perform the recommended bedding procedure before hard braking.
WARNING: This product can expose you to chemicals including Chromium (hexavalent compounds), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
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