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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CPP STAINLESS EXHAUST MANIFOLD STUD KIT FOR 89-18 DODGE CUMMINS 5.9L/6.7L 12V/24V
CPP DIESEL
$49.95Enhance the performance of your 1989-2018 Dodge Cummins 5.9L/6.7L engine with our top-of-the-line CPP Stainless Exhaust Manifold Mounting Studs. Designed to maximize your vehicle's capabilities, these studs are the ultimate solution for optimizing your...$49.95 -
CUMMINS 3905216 | GENUINE OEM HX40 EXHAUST OUTLET 4IN V-BAND CLAMP | FITS 1989-1998 DODGE RAM 5.9L CUMMINS
CUMMINS
$59.32CUMMINS 3905216 | GENUINE OEM HX40 EXHAUST OUTLET 4IN V-BAND CLAMP | FITS 1989-1998 DODGE RAM 5.9L CUMMINS The Cummins 3905216 GENUINE OEM HX40 EXHAUST OUTLET 4IN V-BAND CLAMP is a genuine OEM replacement designed for Dodge Ram Cummins trucks. Function...$59.32 -
CUMMINS 3946275 OEM EXHAUST MANIFOLD GASKET – RAM 5.9L (1998.5–2007)
CUMMINS
$11.57Genuine Cummins Cummins 3946275 — Exhaust Manifold Gasket (Sold Individually, 6 Required) MPN: 3946275 | Also Known As: manifold-to-head gasket | Related/Alternates (ID only): 5266422, 5447591, MS19225 Why This...$11.57 -
CPP CUMMINS 24V MULTILAYER EXHAUST MANIFOLD GASKET SET FOR 98.5-18 DODGE CUMMINS 5.9L/6.7L 24V
CPP DIESEL
$49.00The CPP Diesel Cummins 24V Multilayer Exhaust Manifold Gasket Set is a comprehensive kit designed for 1998.5-2018 Dodge Cummins 5.9L/6.7L 24V engines. With this set, you will receive a total of 6 multilayer exhaust manifold gaskets that have been...$49.00 -
CRAZY CARL'S TTDP TWIN TURBO DOWNPIPE 1994-2007 DODGE CUMMINS 5.9L 12V/24V
CRAZY CARL'S TURBOS
$229.99Downpipe, works with our twin turbo system. Heavy galvanized, fully welded, flanged inlet w/clamp and expanded slip-over outlet for ease of install. ***Parts are custom made to order and may take a few days to ship.*****Crazy Carl's TTDP Twin...$229.99 -
SILVERLINE EXHAUST DSK555 5"STAINLESS RAIN CAP (UNIVERSAL)
$51.73The Silverline DSK555 5" Stainless Rain Cap is a universal exhaust accessory designed to enhance the performance of your vehicle's exhaust system. Engineered with precision and durability in mind, this rain cap is crafted from high-quality stainless...$51.73 -
PACBRAKE HP10124 INDEPENDENT AIR SPRING DASH ACTIVATION SWITCH
PACBRAKE
$317.21Enhancing your vehicle's air suspension system has never been easier. The PACBRAKE HP10124 Independent Air Spring Dash Activation Switch allows drivers to take full control of their air springs or pneumatic accessories directly from the comfort of their...$317.21