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
1994-2002
Application Exhaust Description Part# SwitchPac(Optional) ECM Bypass(Optional)

1994-1998

5.9L 12 Valve with 3" Stock Exhaust with HX/JY35 Turbo

Stock DirectMount 4" PRXB Exhaust Brake Kit with Max Flow Design (Air Actuated). Comes with Air Tank, Hose, & Accessories. Includes Heavy Duty Exhaust Valve Springs. C44072 C18040 N/A

1998 1/2

ISB 24 Valve with 3" Stock Exhaust with HX/HY35 Turbo

Stock DirectMount 4" PRXB Exhaust Brake Kit with Max Flow Design (Air Actuated). Comes with Air Tank, Hose & Accessories. C44074 C18041 C14004(required)

1999-2002

ISB 24 Valve with 3" Stock Exhaust with HX/HY35 Turbo

Stock DirectMount 4" PRXB Exhaust Brake Kit with MAX FLOW Design (Air Actuated). Comes with Air Tank, Hose & Accessories. C44074 C18041 C12015

NOTE: All 1994-2002 trucks with 4” aftermarket exhaust systems with HX/HY35 turbo require an additional adapter, C11342. Trucks equipped with an aftermarket turbo other than HX/HY35, contact Pacbrake, 800.663.0096.

DODGE TRUCKS WITH AUTOMATIC TRANSMISSIONS

1994-2002

APPLICATION

EXHAUST DESCRIPTION PART#

TRANSMISSION

CONTROLLER

1994-1995

12 Valve with 3" Stock Exhaust with HX/HY35 Turbo

Stock DirectMount 4" PRXB Exhaust Brake Kit with MAX FLOW Design (Air Actuated). Comes with Air Tank, Hose & Accessories. Includes Heavy Duty Exhaust Valve Springs. C44073 Included

1996-1998

5.9L 12 Valve with 3" Stock Exhaust with HX/HY35 Turbo

Stock DirectMount 4" PRXB Exhaust Brake Kit with MAX FLOW Design (Air Actuated). Comes with Air Tank, Hose & Accessories. Includes Heavy Duty Exhaust Valve Springs. C44076 Included

1998 1/2-2002

ISB 24 Valve with 3" Stock Exhaust with HX/HY35 Turbo

Stock DirectMount 4" PRXB Exhaust Brake Kit with MAX FLOW Design (Air Actuated). Comes with Air Tank, Hose & Accessories. C44075 Included

NOTE: All 1994-2002 trucks with 4” aftermarket exhaust systems with HX/HY35 turbo require an additional adapter, C11342. Trucks equipped with an aftermarket turbo other than HX/HY35, 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