Product Description
Direct-fit HX40-style downpipe for early 3rd-gen Cummins builds. Designed for 2003–2004 5.9L trucks running Industrial Injection’s early PhatShaft/HX40-outlet turbos. Includes the exhaust clamp for a clean, secure install. Not for 2004.5–2007 PhatShaft applications.
Fitment
- 2003–2004 Dodge Ram 2500/3500 5.9L Cummins with HX40-style turbine outlet (Industrial Injection early PhatShaft)
What’s Included
- HX40-style downpipe (4" outlet)
- Exhaust clamp (V-band)
Key Features
- Purpose-built for 03–04 5.9L Cummins running Industrial Injection early PhatShaft turbos
- HX40-style 4" outlet for reliable sealing and flow
- Clamp included to simplify installation
Recommended Parts (CPP internal links)
- Industrial Injection PhatShaft 64 Turbo (03–04)
- Industrial Injection Super PhatShaft 62 Turbo (03–04)
- Cummins 3905216 HX40 Exhaust V-Band Clamp (spare/replacement)
- 03–07 Cummins Downpipes & Clamps Category
Cross-Reference / Alternatives
- MBRP DS9405 4" Downpipe (03–04, stock-style) — for OEM-style turbo outlets
- MBRP S6104AL 4" Turbo-Back System (03–04)
Helpful Notes
- Will not fit 2004.5–2007 PhatShaft turbo applications; confirm your turbo’s outlet style before ordering.
- HX-series and HE-series V-band clamps are not interchangeable—measure flanges if unsure.
FAQ
Does this fit a stock 2003–2004 turbo?No. It is intended for HX40-style outlets used on Industrial Injection early PhatShaft turbos. For stock-style outlets, see the MBRP DS9405 alternative above.
Is the clamp included?Yes, an exhaust clamp is included with the downpipe.
Will it work on a 2004.5–2007 truck?Not with 2004.5–2007 PhatShaft variants. Verify your turbo outlet style and model year before purchase.
