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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DIAMOND EYE K4236A CAT BACK EXHAUST SYSTEM FOR 04.5-07.5 DODGE RAM 2500/3500 4 INCH SPLIT SIDE WITHT MUFFLER ALUMINIZED
DIAMOND EYE PERFORMANCE
$998.22Transforming your truck's performance with the Cat Back Exhaust System from Diamond Eye Manufacturing. This high-quality exhaust system isn't just a purchase; it's a game-changer for drivers who demand enhanced power, efficiency, and sound from their...$998.22 -
DIAMOND EYE K4236S CAT BACK EXHAUST SYSTEM SINGLE IN/DUAL OUT FOR 04.5-07.5 DODGE RAM 2500/3500 4 INCH WITH MUFFLER STAINLESS
DIAMOND EYE PERFORMANCE
$1,235.89Transforming your truck's performance with the Cat Back Exhaust System from Diamond Eye Manufacturing. This high-quality exhaust system isn't just a purchase; it's a game-changer for drivers who demand enhanced power, efficiency, and sound from their...$1,235.89 -
DIAMOND EYE K4236S-RP CAT BACK EXHAUST SYSTEM SINGLE IN/DUAL OUT 04.5-07.5 DODGE RAM 2500/3500 4 INCH NO MUFFLER409 STAINLESS
DIAMOND EYE PERFORMANCE
$1,111.06Transforming your truck's performance with the Cat Back Exhaust System from Diamond Eye Manufacturing. This high-quality exhaust system isn't just a purchase; it's a game-changer for drivers who demand enhanced power, efficiency, and sound from their...$1,111.06 -
MBRP S61140409 STAINLESS STEEL 5 " TURBO BACK EXHAUST FOR 2003-2004 DODGE RAM WITH 5.9L CUMMINS ENGINE
MBRP
$1,049.99The MBRP S61140409 2003-2004 Dodge Ram 2500/3500 Cummins T409 Stainless Steel 5 Inch Turbo Back Single Side Exit exhaust system is a top choice for truck enthusiasts seeking superior performance and durability. Crafted from rugged sixteen gauge T409...$1,049.99 -
PACBRAKE HP10274 PREMIUM SIMULTANEOUS ELECTRICAL IN-CAB CONTROL KIT WITH DIGITAL GAUGE
PACBRAKE
$1,058.99The PACBRAKE HP10274 Premium Simultaneous Electrical In-Cab Control Kit with Digital Gauge is designed to redefine air spring management by providing effortless control directly from the driver's seat. Ideal for those engaged in towing, hauling, or 4X4...$1,058.99 -
PACBRAKE C44032 DIRECTMOUNT 4 INCH PRXB HP EXHAUST BRAKE FOR 03-04 DODGE RAM WITH 5.9 CUMMINS ENGINE (AUTO)
PACBRAKE
$1,196.73Boost your braking performance and safety with the PACBRAKE C44032 DirectMount 4 Inch PRXB High Performance Exhaust Brake, specially designed for the 2003-2004 Dodge RAM equipped with a 5.9L Cummins engine. This advanced exhaust brake ensures that you...$1,196.73 -
PACBRAKE C44033 DIRECTMOUNT 4 INCH PRXB HP EXHAUST BRAKE FOR 04.5-05 DODGE RAM WITH 5.9 CUMMINS ENGINE (AUTO)
PACBRAKE
$1,196.73Optimize your driving experience with the PACBRAKE C44033 DirectMount 4 Inch PRXB High Performance Exhaust Brake, specifically designed for 2004.5-2005 Dodge RAM trucks featuring the 5.9L Cummins engine. Experience unparalleled braking power,...$1,196.73 -
AFE POWER 48-32018 TWISTED STEEL 304 STAINLESS STEEL HEADER W/ T4 FLANGE FOR 03-07 5.9L CUMMINS
AFE POWER
$1,271.66Unleash the full potential of your Dodge Diesel engine with the AFE Power 48-32018 Twisted Steel 304 Stainless Steel Header with T4 Flange designed for the 2003-2007 Dodge 5.9L Cummins. This meticulously crafted header is engineered to enhance torque and...$1,271.66 -
AFE POWER 48-32017 TWISTED STEEL 304 STAINLESS STEEL T3 HEADER FOR 03-07 CUMMINS 5.9L
AFE POWER
$1,271.66The AFE POWER 48-32017 Twisted Steel 304 Stainless Steel Header is designed to significantly enhance the performance of your 2003-2007 Dodge Diesel Truck equipped with the L6-5.9L (TD) Cummins engine. Crafted from high-quality 304 stainless steel, this...$1,271.66 -
PACBRAKE C44030 DIRECT MOUNT 4 INCH PRXB HP EXHAUST BRAKE KIT FOR 03-04 DODGE RAM WITH 5.9 CUMMINS ENGINE (MANUAL)
PACBRAKE
$1,119.22Elevate your driving experience with the PACBRAKE C44030 Direct Mount 4 Inch PRXB High Performance Exhaust Brake Kit, specifically engineered for 2003-2004 Dodge Ram models equipped with the powerful 5.9L ISB 24 Valve Cummins engine. Designed for those...$1,119.22 -
PACBRAKE C44045 DIRECT MOUNT 4 INCH PRXB HP EXHAUST BRAKE KIT FOR DODGE RAM 04.5-07 CUMMINS 5.9L 24 VALVE ENGINE
PACBRAKE
$1,119.22The PACBRAKE C44045 Direct Mount 4 Inch PRXB High Performance Exhaust Brake Kit is expertly crafted to enhance the driving experience for Dodge RAM owners. Designed for models equipped with the Cummins 5.9L 24 Valve Engine from 2004.5 to 2007, this...$1,119.22 -
PACBRAKE C44047 IN LINE MOUNT 5 INCH PRXB HP EXHAUST BRAKE KIT FOR 03-07 DODGE RAM WITH 5.9 CUMMINS ENGINE (MANUAL) | 06-07 (AUTO)
PACBRAKE
$1,119.22Elevate your driving experience with the PACBRAKE C44047 InLine Mount 5-inch PRXB High Performance Exhaust Brake Kit, designed specifically for 2003-2007 Dodge RAM trucks equipped with the Cummins 5.9L ISB 24 Valve Engine. Whether you own a manual...$1,119.22 -
PACBRAKE C44068 IN LINE MOUNT 4 INCH PRXB HP EXHAUST BRAKE KIT FOR 03-07 DODGE RAM WITH 5.9 CUMMINS ENGINE (MANUAL) | 06-07 (AUTO)
PACBRAKE
$1,119.22Transform your Dodge RAM truck's driving dynamics with the Pacbrake C44068 In Line Mount 4 Inch PRXB High Performance Exhaust Brake Kit, specifically designed for 2003-2007 models powered by the robust 5.9L ISB 24 Valve Engine. This comprehensive kit...$1,119.22