EXHAUST SYSTEM AND COMPONENTS
EXHAUST SYSTEM AND COMPONENTS — 03–07 DODGE RAM 5.9L CUMMINS
Unlock flow, lower EGTs, and dial in the sound you want on your 2003–2007 Ram 2500/3500 5.9L Cummins. CPP Diesel stocks proven 4"/5" cat-back systems, downpipes, exhaust manifolds, clamps, and mufflers—plus exhaust brakes for confident towing.
DODGE CUMMINS › 03–07 5.9L CUMMINS › EXHAUST SYSTEM AND COMPONENTS
Shop the full 03–07 EXHAUST category
Shop by System
- Cat-Back Systems (’04.5–’07)
Diamond Eye K4234A — 4" Cat-Back w/ Muffler (04.5–07.5) • Diamond Eye K4234A-RP — 4" Cat-Back, No Muffler (04.5–07.5) • MBRP S6108AL — 4" Cat-Back (04.5–07) - Downpipes & First Sections
HE351 Downpipes & Related (03–07) • Diamond Eye 221064 — 4" First Section (03–Early ’07) - Exhaust Manifolds (T3/T4)
BD Diesel 1046087 Pulse Manifold (03–07) • ATS 204-920-2272 Pulse Flow T3 (03–07) • Browse All 03–07 Manifolds & Hardware - Clamps, V-Bands & Hardware
Diamond Eye 444000 — 4" U-Bolt Clamp • Diamond Eye L40SA — 4" Torca Lap-Joint • PPE 517140000 — 4" Quick-Release V-Band • PPE 517340000 — 4" Stainless V-Band • Mishimoto MMCLAMP-VA-4 — 4" V-Band - Mufflers & Resonators
Diesel Mufflers, Resonators & Deletes - Exhaust Brakes (Towing)
Pacbrake C44047 — PRXB Inline Kit (03–07) • Pacbrake C20141 — ECM Bypass (03–07)
Why Buy Exhaust Parts from CPP Diesel?
- 03–07 focused fitment: Hand-picked systems and components that fit the 5.9L CR platform.
- Top brands, real support: Diamond Eye, MBRP, BD, ATS, PPE, Mishimoto, Pacbrake—backed by diesel techs.
- Use-case guidance: Towing, daily, or track—we help match pipe size, muffler choice, and hardware.
Frequently Asked Questions
What’s the difference between 2003–2004 and 2004.5–2007 systems?
Early ’03–’04 trucks use different turbo-back layouts and muffler sizing. Many cat-back kits are labeled for 04.5–07. Always match the year range listed on the product page.
4" vs 5"—which size should I choose?
4" is a great all-around upgrade for stock to mild builds. 5" can reduce restriction further and change tone, often chosen for larger tunes/turbos. Ensure tip and hanger clearance.
Are these parts emissions compliant?
Choose systems that are designed for your model year and local regulations. Always follow the product’s compliance notes and applicable laws.
Do I need an exhaust brake for towing?
On heavy grades with big trailers, a PRXB-style brake adds control and reduces service brake wear. See our Pacbrake kits above for 03–07 applications.
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CLAMPS / ACCESSORIES
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DOWNPIPES
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EXHAUST ADAPTERS
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EXHAUST BRAKES
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EXHAUST ELBOWS
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EXHAUST MANIFOLDS
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EXHAUST SYSTEM
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EXHAUST TIPS
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MUFFLERS
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MUFFLER DELETES / TUBING
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SPLITTERS
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STACKS / COMPONENTS
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TAILPIPES
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BD DIESEL 1028035 EXHAUST BRAKE UNIVERSAL 3.5 INCH REMOTE MOUNT AIR ACTUATED
BD DIESEL
$1,485.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,485.95 -
BD DIESEL 1028040 EXHAUST BRAKE UNIVERSAL 4.0 INCH REMOTE MOUNT AIR ACTUATED
BD DIESEL
$1,485.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,485.95 -
BD DIESEL 1028050 EXHAUST BRAKE UNIVERSAL 5.0 INCH REMOTE MOUNT AIR ACTUATED
BD DIESEL
$1,485.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,485.95 -
BD DIESEL 1028135 EXHAUST BRAKE UNIVERSAL 3.5 INCH REMOTE MOUNT AIR ACTUATED C/W AIR COMPRESSOR
BD DIESEL
$1,640.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,640.95 -
BD DIESEL 1028140 EXHAUST BRAKE UNIVERSAL 4.0 INCH REMOTE MOUNT AIR ACTUATED C/W AIR COMPRESSOR
BD DIESEL
$1,640.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,640.95 -
BD DIESEL 1027330 EXHAUST BRAKE 2006-2007 DODGE AIR ACTUATED REMOTE MOUNT VALVE 4 INCH EXHAUST C/W AIR COMPRESSOR
BD DIESEL
$1,640.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,640.95 -
BD DIESEL 1027338 EXHAUST BRAKE 2003-2005 DODGE AIR ACTUATED REMOTE MOUNT VALVE 4IN EXHAUST C/W AIR COMPRESSOR
BD DIESEL
$1,640.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,640.95 -
BD DIESEL 2023138 EXHAUST BRAKE 2003-2004 DODGE 5.9L AIR ACTUATED TURBO MOUNT
BD DIESEL
$1,640.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,640.95 -
BD DIESEL 2023330 EXHAUST BRAKE 2006-2007 DODGE 5.9L AIR ACTUATED TURBO MOUNT
BD DIESEL
$1,640.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,640.95 -
BD DIESEL 2023331 EXHAUST BRAKE 2004.5-2005 DODGE 5.9L 325HP AIR ACTUATED TURBO MOUNT
BD DIESEL
$1,640.95It has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating...$1,640.95 -
PACBRAKE C44067 INLINEMOUNT 4 INCH PRXB HP EXHAUST BRAKE FOR 03-05 DODGE RAM WITH 5.9 CUMMINS ENGINE (AUTO)
PACBRAKE
$1,454.53The PACBRAKE C44067 INLINEMOUNT 4 INCH PRXB HIGH PERFORMANCE EXHAUST BRAKE transforms the driving dynamics of your 2003-2005 Dodge RAM equipped with a 5.9L ISB 24 Valve Engine. This state-of-the-art exhaust brake is designed for serious drivers who...$1,454.53 -
PACBRAKE C44038 INLINE MOUNT 4" PRXB EXHAUST BRAKE KIT FOR 07.5-18 DODGE RAM WITH 6.7 CUMMINS ENGINE (MANUAL / AUTO)
PACBRAKE
$1,454.53The Pacbrake C44038 Inline Mount 4" PRXB Exhaust Brake Kit elevates the driving experience for Dodge RAM owners with a 6.7L Cummins engine. Designed for models from 2007.5 to 2018, this exhaust brake kit optimizes braking performance, safety, and...$1,454.53 -
PACBRAKE C44049 DIRECT MOUNT 4 INCH PRXB HP EXHAUST BRAKE KIT FOR 03-04 DODGE RAM ITH 5.9 CUMMINS ENGINE (AUTO)
PACBRAKE
$1,454.53The PACBRAKE C44049 Direct Mount 4 Inch PRXB High-Performance Exhaust Brake Kit is your ultimate partner for enhanced braking performance in Dodge 2003-2004 Cummins 5.9L ISB 24 Valve Engines equipped with 47RE or 48RE Automatic Transmissions. This...$1,454.53 -
PACBRAKE C44051 IN LINE MOUNT 5 INCH PRXB HP EXHAUST BRAKE KIT FOR 03-05 DODGE RAM ITH 5.9 CUMMINS ENGINE (AUTO)
PACBRAKE
$1,454.53The PACBRAKE C44051 In Line Mount 5 Inch PRXB High Performance Exhaust Brake Kit offers a transformative upgrade for your 2003-2005 Dodge RAM equipped with a Cummins 5.9L ISB 24 Valve Engine and 47RE/48RE Automatic Transmission. This advanced exhaust...$1,454.53 -
PACBRAKE C44052 DIRECT MOUNT 4 INCH PRXB HP EXHAUST BRAKE KIT FOR 04.5-05 DODGE RAM ITH 5.9 CUMMINS ENGINE (AUTO)
PACBRAKE
$1,454.53Elevate your driving experience with the Pacbrake C44052 Direct Mount 4 Inch PRXB High Performance Exhaust Brake Kit, meticulously engineered for 2004.5-2005 Dodge RAM trucks featuring the robust Cummins 5.9L ISB 24 Valve Engine and 48RE Automatic...$1,454.53