MBRP DAL405 4 inch Aluminized Down-Pipe | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

Features:

• Fits 2003–2004 Dodge RAM 2500 and 3500
• Designed for 5.9L Cummins diesel engines
• 4-inch diameter for improved exhaust flow
• Aluminized steel construction for durability
• Reduces backpressure for better performance
• Optimizes turbo efficiency and throttle response
• Smooth mandrel bends for unrestricted airflow
• Direct bolt-on fit for easy installation
• Improves overall exhaust system performance
• Corrosion-resistant coating for long life
• Pairs well with aftermarket exhaust systems
• Ideal for performance builds and towing setups

Unleash The Flow And Let Your Turbo Breathe

If you’re chasing more power from your 2003–2004 5.9L Cummins, the MBRP DAL405 4-inch Aluminized Down-Pipe is a smart way to wake things up. This isn't just a pipe, it’s the performance link between your turbo and the rest of your exhaust system. With a smooth, unrestricted path for exhaust gases, you’ll see a quicker turbo spool, better throttle response, and a more aggressive tone. Built for the truck owner who doesn’t settle for stock, this pipe is all about turning potential into performance. Whether you're towing heavy or just carving out more grunt for daily driving, this upgrade helps eliminate the factory bottlenecks. And with a tough aluminized steel construction, it holds up to heat and hard miles with no problem. Bolt it on and feel the difference every time you hit the throttle.

Engineered For Efficient Flow And Lasting Strength

The MBRP DAL405 Down-Pipe is designed to maximize the efficiency of your turbo system by reducing backpressure and increasing exhaust velocity. Constructed from 4-inch aluminized steel, it offers improved corrosion resistance and durability compared to stock components, making it ideal for trucks that work hard. The mandrel-bent tubing ensures a consistent diameter through every curve, allowing exhaust gases to exit smoothly and without restriction. This leads to more efficient turbo operation, lower exhaust gas temperatures, and improved engine performance overall. It’s a direct-fit solution for 2003–2004 Dodge RAM 2500 and 3500 trucks with the 5.9L Cummins, making installation straightforward with no need for cutting or modification. The pipe is also compatible with most aftermarket exhaust systems, making it a great foundation for a full performance build. It’s a smart, functional upgrade for diesel enthusiasts who demand both strength and results.

Fits: 2003, 2004 Dodge RAM 2500/3500 5.9L Cummins

Notes:

• Designed specifically for 2003–2004 Dodge 5.9L Cummins models.
• Acts as a performance upgrade over restrictive factory down-pipes.
• Improves exhaust flow for quicker turbo spool-up and better throttle response.
• Constructed from aluminized steel for heat and corrosion resistance.
• Mandrel-bent tubing ensures consistent diameter and unrestricted flow.
• Best paired with a full MBRP or aftermarket exhaust system.
• Some modification may be required on trucks with non-factory turbos or configurations.
• Ideal for customers looking to lower exhaust gas temperatures (EGTs).
• Not designed for use with emissions equipment or EGR setups unless specified.
• Installation may require professional assistance for optimal fit and sealing.