BPS 4" Turbo Downpipe with 6" drop for above Frame Applications

Upgrade your heavy-duty diesel exhaust system with the BPS Diesel 4" Above Frame Downpipe – engineered for above-frame applications with a 6" drop and featuring a versatile 5" Marmon flange for seamless integration with S400 and S410 turbochargers.

This premium downpipe ensures efficient exhaust flow, reduced backpressure, and enhanced turbo spooling, leading to improved engine performance, better fuel efficiency, and lower emissions in demanding trucking and industrial environments. Ideal for rebuilds, upgrades, or replacements, it's a durable solution built to withstand high-heat and high-vibration conditions, helping you maintain peak power and reliability on the road or job site. Available as the pipe alone or bundled with a stainless steel V-band clamp for secure installation.

Proudly offered by BPS Diesel, this downpipe fits all S400 and S410 turbos equipped with a 5" Marmon flange and is commonly installed in a variety of heavy-duty trucks and equipment (compatible with multiple brands and models). Whether you're equipping a fleet vehicle or customizing your rig, the 5" Marmon flange provides broad compatibility, making it a go-to choice for "4-inch above frame downpipe," "6-inch drop exhaust pipe," "S400 turbo downpipe," "S410 Marmon flange exhaust," or "heavy-duty truck exhaust components." Backed by our industry-leading customer service and fast shipping from Shoemakersville, PA – order today and optimize your exhaust setup!

Key Features:

• Versatile 5" Marmon Flange: Designed for easy mating with S400 and S410 turbos, ensuring a secure, leak-free connection. Includes provisions for sensors or bungs as needed.
• Robust Construction: Made from high-grade aluminized steel materials for corrosion resistance, thermal durability, and long service life in extreme conditions.
• Optimized Flow Design: 4" diameter with 6" drop promotes smooth exhaust evacuation, minimizing restrictions for quicker turbo response and increased horsepower/torque.
• Above-Frame Configuration: Specifically engineered for above-frame installations, providing clearance and fitment flexibility in various chassis setups.
• Purchase Options: Choose the downpipe alone for basic replacements or the downpipe with stainless steel V-band clamp bundle for added convenience and a tighter seal.

Compatibility: Fits all S400 and S410 turbos with 5" Marmon flange in above-frame applications. Commonly used in heavy-duty trucks and equipment from brands like Peterbilt, Kenworth, Freightliner, and more, with cross-compatibility for other vehicles equipped with similar turbo setups. Verify fitment with your turbo model and frame configuration for best results.

Professional installation recommended for optimal performance and safety. Pair it with our selection of turbos, gaskets, and exhaust manifolds for a complete system refresh. Shop BPS Diesel today for reliable heavy-duty diesel solutions that keep you moving!