4 inch CARB Approved T409 Stainless Turbo Down Pipe

Features:

• 4-inch mandrel-bent tubing for optimal flow
• T409 stainless steel construction resists corrosion
• Reduces backpressure and improves exhaust efficiency
• Enhances turbocharger response and lowers EGTs
• CARB approved for emissions compliance in all 50 states
• Direct bolt-on fit to factory turbo outlet
• Designed specifically for 2011–2015 6.7L Powerstroke
• Durable design for towing and performance use
• Compatible with factory and aftermarket exhausts
• Legal upgrade for emissions-sensitive areas
• Improves durability under high-heat conditions
• Trusted MBRP quality and performance engineering

Wake Up Your Powerstroke With Street Legal Performance

If you’re looking to upgrade your 2011–2015 Powerstroke without the hassle of emissions headaches, the MBRP FS9CA459 4-Inch Turbo Down Pipe is the bolt-on solution your truck has been waiting for. It gives your exhaust system the breathing room it needs by reducing backpressure and letting your turbo spool faster, all while staying fully CARB compliant. That means more throttle response, lower exhaust temps, and a smoother ride whether you're towing, hauling, or just opening it up on the highway. Built from durable T409 stainless steel, it’s ready to take on the heat and corrosion that comes with daily driving or tough work conditions. The 4-inch mandrel-bent design keeps the flow strong and consistent, giving you performance you can feel without sacrificing legality. It bolts directly into the factory system with no custom work required, making install straightforward for weekend wrenchers or shop techs. If you want more power and better flow without the drama, this pipe is an easy win.

Designed For Efficient Flow And Long Lasting Durability

The MBRP FS9CA459 CARB Approved Turbo Down Pipe is engineered to optimize exhaust flow on 2011–2015 Ford F250 and F350 trucks equipped with the 6.7L Powerstroke engine. It features a 4-inch diameter and mandrel-bent T409 stainless steel construction, which improves exhaust evacuation and reduces backpressure from the turbo outlet. This leads to cooler exhaust gas temperatures, more efficient turbocharger operation, and improved overall engine performance. The direct-fit design ensures seamless integration with your factory components, and it can be used with both stock and aftermarket exhaust systems. Built to withstand the thermal stress of heavy towing and extended use, the T409 steel offers a strong balance of heat resistance and long-term durability. Most importantly, this pipe is fully CARB approved, making it emissions legal in all 50 states. It is ideal for Powerstroke owners who want to stay compliant without compromising flow or performance. Whether your truck sees job sites or long road miles, this down pipe delivers a solid mix of strength, fit, and flow.

Fits: 2011, 2012, 2013, 2014, 2015 Ford F250/F350 6.7L Powerstroke

Notes:

• Designed for 2011–2015 Ford F250/F350 6.7L Powerstroke
• Constructed from high-quality T409 stainless steel
• 4-inch mandrel-bent design improves exhaust flow
• Reduces turbo backpressure and lowers EGTs
• Improves turbo spool-up and throttle response
• Direct-fit replacement for factory turbo down pipe
• Fully CARB approved and emissions legal in all 50 states
• Compatible with both stock and aftermarket exhaust systems
• Ideal for towing, daily driving, or mild performance upgrades
• Offers long-term corrosion resistance and reliability