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Industry-Leading Braking Performance at Lower RPM
Pacbrake’s PRXB exhaust brake provides up to 50% more braking force at low engine speeds, specifically within the 1400–1800 RPM range—where you typically drive. This high-performance kit gives you shorter stopping distances and better speed control without relying solely on your service brakes. Whether you’re descending steep grades or hauling heavy loads, PRXB offers peace of mind and unmatched reliability.
Complete Air-Actuated Kit with Accessories
This direct-mount exhaust brake system includes Pacbrake’s onboard air kit with HP325 Series compressor, a 0.5-gallon air tank, 25-foot coiled air hose, and a complete air accessory and fittings package. The system is air-actuated and includes everything needed for a seamless installation, including ECM bypass and controller options for compatible standard transmission models.
Military-Approved Durability & Corrosion Resistance
Built with military-grade materials and coated with Pacbrake’s exclusive Arcor nitride finish, this brake system resists wear and corrosion for long-lasting durability. The spring-controlled, pressure-regulated valve protects against engine overpressure, ensuring reliability even in the harshest conditions.
Fitment Guide
| Years | Make | Model | Driveline |
|---|---|---|---|
| 2005–2007 | Dodge | Ram 2500 | N/A |
| 2005–2007 | Dodge | Ram 3500 | N/A |
Key Features
- Pacbrake PRXB delivers the strongest braking HP available
- Exceptional performance at low RPMs (1400–1800 RPM range)
- Significantly reduces reliance on service brakes
- Industry-exclusive Arcor nitride coating on components
- Spring-controlled pressure regulation prevents engine overpressure
- Severe-duty rated and military approved for extreme reliability
Included Components
- 4-Inch PRXB Exhaust Brake
- Onboard HP325 Air Compressor Kit
- 0.5 Gallon Air Tank
- 25’ Coiled Air Hose
- Air Accessories & Fittings
- Controller (when required)
- Optional ECM Bypass Components (based on transmission/year)
Important Notes
- ECM bypass kit C20135 required for 2004.5 Cummins w/ standard transmission
- ECM bypass kit C20141 required for 2005 Cummins w/ standard transmission
- ECM bypass not required for 2006–2007 standard transmission models
- Not applicable for 2006–2007 automatic models (48RE) requiring switch/ECM integration
- Switch PAC C18042 optional for 2004.5–2005 models
- California Residents: PROP 65 WARNING – Cancer and Reproductive Harm
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