BD Diesel Turbo Downpipe Kit - S400 4in Aluminized Full Marmon

This is the BD Diesel Turbo Downpipe Kit, designed to connect your S400 turbocharger to your exhaust system. It's built with 4-inch aluminized tubing and features a full Marmon flange that's 4.2 inches in diameter, making it a solid choice for specific turbo setups. This downpipe was originally part of BD Diesel's compound twin turbo kits, but it's also commonly used as a replacement part or can be modified for other custom applications where an S400 turbo with a Marmon flange is being installed.

The aluminized tubing offers a good balance of durability and cost for exhaust components. BD Diesel is known for its focus on diesel performance, and this downpipe kit comes with the necessary exhaust band clamp and turbo V-band clamp to help ensure a secure connection. While it's designed for specific S400 turbo applications, mechanics often find ways to adapt it for custom builds, especially when dealing with the larger 4.2-inch Marmon flange.

Keep in mind that this part is not CARB approved and cannot be shipped to California. It includes the essential clamps needed for installation, simplifying the process when you're working on your exhaust system.