In order to have consistent and effective braking over the entire RPM range, it is important (and necessary) to maintain constant backpressure. To achieve this, Pacbrake’s patented design has incorporated an additional waste gate on the butterfly valve to regulate the amount of exhaust flow that is being passed through. The flow is controlled by a spring-loaded arm, whose pressure rating and location are key factors in the functionality of the PRXB. Located outside of the housing and away from the heat, the spring is able to maintain its strength and durability for years of proper and precise braking performance.

Pacbrake PRXB Cut-A-WayClick to Enlarge

PACBRAKE PRXB EXHAUST BRAKE APPLICATION GUIDE
DODGE TRUCKS WITH STANDARD TRANSMISSIONS
2003-2004.5
Application Exhaust Description Part# SwitchPac(Optional) ECM Bypass(Optional)

2003-2004.5

5.9L 24 Valve (built up to Jan 4, 2004

Stock DirectMount 4" PRXB Exhaust Brake Kit with Max Flow Design (Air Actuated). Comes with Air Tank, Hose, & Accessories. C44030 C18042 C14037

 

Stock DirectMount 4" PRXB Exhaust Brake Kit with Max Flow Design (Air Actuated). For Vehicles with existing onboard air. C44031 C18042 C14037
  Stock DirectMount 4" PRXB High Performance Exhaust Brake Only. UPGRADE. Replaces Fixed Orifice Exhaust Brake. C40110 C18042 C14037
  Aftermarket InlineMount 5" PRXB High Performance Exhaust Brake Kit (Air Actuated). Comes with Air Tank, Hose, & Accessories C44047 C18042 C14037

2004.5

5.9L 24 Valve(built Jan 5, 2004 - Jan 25, 2004)

Stock DirectMount 4" PRXB High Performance Exhaust Brake Kit (Air Actuated). Comes with Air Tank, Hose, & Accessories. C44045 C18042 C20135
  Stock DirectMount 4" PRXB High Performance Exhaust Brake Kit (Air Actuated). For Vehicles with Existing Onboard Air. C44037 C18042 C20135
  Stock DirectMount 4" PRXB High Performance Exhaust Brake ONLY. UPGRADE. Replaces Fixed Orifice Exhaust Brake C40111 C18042 C20135
  Aftermarket InLineMount 5" PRXB High Performance Exhaust Brake Kit (Air Actuated). Comes with Air Tank, Hose, & Accessories. C44047 C18042 C20135

NOTE:  All above 2003-2004.5 kits will NOT work with Banks Turbo Back Monster Exhaust. However, they will work with Banks Cat Back Monster Exhaust. Applications for aftermarket turbo chargers, please contact Pacbrake, 800.663.0096.

DODGE TRUCKS WITH AUTOMATIC TRANSMISSIONS

2003-2004.5

APPLICATION

EXHAUST DESCRIPTION PART#

TRANSMISSION

CONTROLLER

2003-2004

5.9L 24 Valve -47/48RE Auto Trans (built up to Jan 4, 2004)

Stock DirectMount 4" PRXB Exhaust Brake Kit with MAX FLOW Design (Air Actuated). Comes with Air Tank, Hose & Accessories. C44049 Included
  Stock DirectMount 4" PRXB High Performance Exhaust Brake Kit (Air Actuated). For vehicles with Existing Onboard Air. C44032 Included

 

 

Stock DirectMount 4" PRXB High Performance Exhaust Brake Kit  ONLY. UPGRADE. Replaces Fixed Orifice Exhaust Brake. C40110 Not Included
  Aftermarket InLineMount 5" PRXB High Performance Exhaust Brake Kit (Air Actuated). Comes with Air Tank, Hose & Accessories. C44051 Included

2004.5

5.9L 24 Valve - 48RE Auto Trans (built Jan 5, 2004-July 25, 2004)

Stock DirectMount 4" PRXB High Performance Exhaust Brake Kit (Air Actuated). Comes with Air Tank, Hose, & Accessores. C44052 Included
  Stock DirectMount 4" PRXB High Performance Exhaust Brake Kit (Air Actuated). For Vehicles with Existing Onboard Air. C44033 Included
  Stock DirectMount 4" PRXB High Performance Exhaust Brake ONLY. UPGRADE. Replaces Fixed Orifice Exhaust Brake. C40111 Not Included
  Aftermarket InLineMount 5" PRXB High Performance Exhaust Brake Kit (Air Actuated). Comes with Air Tank, Hose, & Accessories. C44051 Included

NOTE:  All above 2003-2004.5 kits will NOT work with Banks Turbo Back Monster Exhaust. However, they will work with Banks Cat Back Monster Exhaust. Applications for aftermarket turbo chargers, please contact Pacbrake, 800.663.0096.

PACBRAKE'S SWITCH-PAC

Designed specially for manual transmission vehicles, Pacbrake’s Switch-Pac is a shifter-mounted ON/OFF switch. The convenient fingertip control location provides easy access for exhaust brake activation. The Switch-Pac can operate not only your vehicle's exhaust brake, but other vehicle accessories such as Pacbrake's air horns.


Pacbrake SwitchPacPacbrake SwitchPac