AW-17220743903, GT-K4ZB5X3V

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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

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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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DPS MAN0129 EXHAUST MANIFOLD T4 24V RAM CUMMINS 1998.5-2018 5.9 & 6.7 3-PIECE

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Now: $419.00

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DPS MAN0161 EXHAUST MANIFOLD T3 FOR 2003-2007 DODGE CUMMINS 24V 5.9L 2-PIECE

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Now: $489.00

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GATOR FASTENERS EMSK5967C-BLK HEAVY DUTY EXHAUST MANIFOLD STUD KIT FOR DODGE/RAM (1994-20) 5.9L AND 6.7L CUMMINS DIESEL (BLACK OXIDE)

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Now: $144.99

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GATOR FASTENERS EMSK5967C-Cr HEAVY DUTY EXHAUST MANIFOLD STUD KIT FOR DODGE/RAM (1994-20) 5.9L AND 6.7L CUMMINS DIESEL (CHROME)

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DIAMOND EYE 121027 EXHAUST PIPE 4 INCH 03-EARLY 07 DODGE RAM 2500/3500 SECTION PASS STEEL PERFORMANCE SERIES EXHAUST TAIL PIPE

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Now: $105.85

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DIAMOND EYE 150100 UNIVERSAL STACK KIT 5 INCH ALUMINIZED PERFORMANCE SERIES DIESEL EXHAUST KIT

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Now: $902.74

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DIAMOND EYE 221004 EXHAUST PIPE 4 INCH 94-EARLY 07 DODGE RAM 2500/3500 FIRST SECTION PASS PERFORMANCE SERIES EXHAUST TAIL PIPE

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Now: $119.41

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DIAMOND EYE 221005 EXHAUST PIPE 4 INCH SECOND SECTION SINGLE EXIT SYSTEM FOR 94-2007.5 24V DODGE CUMMINS EXHAUST TAIL PIPE

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Now: $101.29

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DIAMOND EYE 222060 EXHAUST PIPE 5 INCH 04.5-EARLY 07 DODGE RAM 2500/3500 FIRST SECTION PASS STEELPERFORMANCE SERIES EXHAUST TAIL PIPE

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Now: $267.39

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DIAMOND EYE 261004 EXHAUST PIPE 4 INCH FIRST SECTION PASS 94-EARLY 07 DODGE RAM 2500/3500 PERFORMANCE SERIES EXHAUST TAIL PIPE

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Now: $154.20

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DIAMOND EYE 400024 EXHAUST PIPE 24 INCH ALUMINIZED 4 INCH OD STRAIGHT BUMPED ON ONE END

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Now: $69.84

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DIAMOND EYE 400036 EXHAUST PIPE 36 INCH ALUMINIZED 4 INCH OD STRAIGHT BUMPED ON ONE END

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Now: $88.30

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DIAMOND EYE 400048 EXHAUST PIPE 48 INCH ALUMINIZED 4 INCH OD STRAIGHT BUMPED ON ONE END

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Now: $107.09

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DIAMOND EYE 400405 EXHAUST RESONATOR 4 INCH ALUMINIZED PERFORMANCE QUIET TONE RESONATOR WITH ENDS TOP

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Now: $179.17

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DIAMOND EYE 405024 EXHAUST PIPE 5 INCH ALUMINIZED 24 INCH STRAIGHT BUMPED ON ONE END

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Now: $77.58

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DIAMOND EYE 405040 EXHAUST PIPE 5 INCH ALUMINIZED 40 INCH STRAIGHT BUMPED ON ONE END

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Now: $133.36

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DIAMOND EYE 420024 EXHAUST PIPE 24 INCH STAINLESS 4 INCH OD STRAIGHT BUMPED ON ONE END

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Now: $93.92

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DIAMOND EYE 420048 EXHAUST PIPE 48 INCH STAINLESS 4 INCH OD STRAIGHT BUMPED ON ONE END

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Now: $156.64

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DIAMOND EYE 454000 EXHAUST CLAMP 4 INCH ZINC COATED U-BOLT SADDLE CLAMP

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Now: $16.73

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DIAMOND EYE 460002 DIESEL EXHAUST MUFFLER 26 INCH ROUND 4 INCH CENTER INLET/OUTLET ALUMINIZED PERFORMANCE LOUVERED EXHAUST MUFFLER

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Now: $235.73

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DIAMOND EYE 460005 DIESEL EXHAUST MUFFLER 30 INCH ROUND 4 INCH CENTER INLET/OUTLET ALUMINIZED PERFORMANCE LOUVERED EXHAUST MUFFLER

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Now: $270.43

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DIAMOND EYE 460031 DIESEL EXHAUST MUFFLER 30 INCH ROUND 4 INCH CENTER INLET/OUTLET STAINLESS EXHAUST MUFFLER PERFORMANCE PERFORATED

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DIAMOND EYE 460033 DIESEL EXHAUST MUFFLER 4 INCH INLET/OUTLET LOUVERED PACKED MUFFLER 24 INCH BODY 7 INCH CASE STAINLESS EXHAUST MUFFLER

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Now: $335.16

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DIAMOND EYE 470050 DIESEL EXHAUST MUFFLER 27 INCH ROUND 4 INCH CENTER INLET/OUTLET STAINLESS EXHAUST MUFFLER PERFORMANCE PERFORATED

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Now: $290.71

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DIAMOND EYE 510202 MUFFLER DELETE PIPE 3-1/2 X 37 INCH FOR 2003-2004.5 DODGE

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Now: $154.16

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DIAMOND EYE 510204 MUFFLER DELETE PIPE REPLACEMENT 27 INCH STEEL 4 INCH INLET/OULET ALUMINIZED PERFORMANCE MUFFLER REPLACEMENT

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Now: $66.28

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DIAMOND EYE 510205 MUFFLER DELETE PIPE REPLACEMENT 30 INCH STEEL ALUMINIZED PERFORMANCE MUFFLER REPLACEMENT

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DIAMOND EYE 510209 MUFFLER DELETE PIPE REPLACEMENT 27 INCH 4 INCH INLET/OUTLET STAINLESS PERFORMANCE MUFFLER REPLACEMENT

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DIAMOND EYE 510210 MUFFLER DELETE PIPE REPLACEMENT 30 INCH 4 INCH INLET/OUTLET STAINLESS PERFORMANCE MUFFLER REPLACEMENT

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DIAMOND EYE 510215 DIESEL EXHAUST MUFFLER 3.5 INCH INLET/OUTLET 32 INCH 03-EARLY 04 DODGE RAM 2500/3500 EXHAUST MUFFLER PERFORMANCE SERIES

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Now: $100.75

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