BD Diesel 1045240 Down Pipe Kit | Universal

Features:

• Fits S400 turbos with Marmon 4.2-inch flange
• Includes heavy-duty turbo V-band clamp
• Includes high-quality exhaust band clamp
• Originally part of BD twin turbo kits
• Ideal replacement for Tow Twin Turbo kits
• Works with R700 and R850 twin kits
• Can be modified for custom turbo setups
• Built for high-performance turbo systems
• Universal fit for custom diesel builds
• EPA compliant for federal use
• Backed by 12-month parts warranty

Let Your Turbo System Breathe The Way It Should

If you're serious about boosting your diesel's performance with a compound turbo setup, you know how important a properly built downpipe is. The BD Diesel 1045240 Down Pipe Kit gives you the solid, high-flow connection your S400 turbo needs to perform without restriction. Originally designed as part of BD’s legendary twin turbo systems, like the Tow Twins, R700, and R850 kits, this downpipe has proven itself in some of the toughest setups out there. It comes ready with both a turbo V-band clamp and an exhaust band clamp, making installation smoother and more secure. Whether you’re replacing a worn-out part or piecing together a custom build, this universal kit gives you room to work without sacrificing quality. Built to handle serious heat and pressure, it’s a great choice if you’re trying to get the most from your exhaust flow. When you’re upgrading your turbo system, this is the kind of part that keeps the whole setup working in sync.

Engineered To Match High Performance Turbo Builds

The BD Diesel 1045240 Down Pipe Kit is a specialized component built to support S400 turbos using a full Marmon 4.2-inch flange. This kit was originally part of BD’s factory-engineered compound turbo kits, giving it a track record of reliable performance in high-boost applications. The included V-band and exhaust clamps are designed to ensure a leak-free, secure fit under demanding conditions. Although it's primarily used as a replacement in BD's Tow Twin, R700, and R850 turbo systems, its universal design allows for adaptation into custom builds with minimal modification. The durable construction holds up well against the extreme heat and pressure commonly found in high-performance diesel engines. It’s also emissions-compliant for federal EPA guidelines, so you can use it confidently within legal limits. For builders looking to optimize flow and durability in their turbo system, this downpipe offers proven performance without compromise.

Fits: Universal

Notes:

• Designed for use with S400 turbochargers
• Fits turbos with full Marmon 4.2-inch flange
• Originally developed for BD’s compound twin turbo kits
• Commonly used in Tow Twin, R700, and R850 kits
• Ideal as a replacement part for existing BD turbo setups
• Can be modified for other custom turbo applications
• Includes turbo V-band and exhaust band clamps
• Installation may require fabrication for non-BD kits
• Universal product, fitment will vary by build
• Meets EPA’s reasonable basis emissions requirements
• Legal for sale and use under federal EPA jurisdiction
• Backed by a 12-month parts-only warranty