BD Diesel S400 Full Marmon Downpipe Kit (1045240) for 2003-2009 Cummins 5.9L / 6.7L

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The BD Diesel S400 Full Marmon Downpipe Kit (1045240) is a high-performance exhaust upgrade for 2003–2009 Dodge Ram trucks with Cummins 5.9L or 6.7L engines and an S400 turbo. It features a full Marmon flange for a secure, leak-free fit, enhancing exhaust flow, turbo efficiency, and reducing backpressure. Built from durable materials to handle extreme conditions, it’s ideal for performance and heavy-duty use. The kit is designed for easy installation and compatibility with aftermarket turbo setups.

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Description

The BD Diesel S400 Full Marmon Downpipe Kit (1045240) is a high-performance exhaust upgrade designed specifically for 2003–2009 Dodge Ram trucks equipped with the Cummins 5.9L or 6.7L engine and an S400 turbocharger. This kit features a full Marmon flange connection for a secure, leak-free fit and improved exhaust flow, which enhances turbo efficiency and reduces backpressure. Constructed from durable, high-quality materials, the downpipe is engineered to withstand extreme temperatures and heavy-duty use, making it ideal for performance enthusiasts and heavy haulers alike. BD Diesel’s precision design ensures easy installation and compatibility with aftermarket turbo setups, providing a reliable and efficient solution for maximizing your Cummins engine’s potential.

Additional information
Weight 12.5 lbs
Dimensions 52 × 12 × 12 in
Fitment

Fitment

2003-2009 Cummins 5.9L / 6.7L

Features

Features

  • Downpipe used with install of S400 turbos with full Marmon 4.2-inch flange
  • Comes with Turbo V-Band Clamp
  • Comes with Exhaust Band Clamp
Installation

Installation

WARRANTY

Parts

  • 12-Months
Warning

Warning

This product CANNOT be shipped to California!

About brand
BD Diesel Performance is a diesel performance manufacturer focused on reliability and towing performance. The company designs parts that improve durability, power delivery, and vehicle control. BD Diesel products support daily driving, heavy towing, and work-ready diesel trucks. BD Diesel engineers turbochargers, exhaust brakes, transmission upgrades, and fuel system components. Their products help manage heat, control exhaust flow, and protect drivetrain parts. These upgrades improve drivability under load and during long pulls. Diesel owners trust BD Diesel for proven solutions. Whether upgrading a tow rig or improving reliability, BD Diesel delivers parts built for real-world use.
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