4 inch Turbo Back Single Side Exit T409 Stainless Exhaust System

Features:

• 4-inch mandrel-bent T409 stainless steel tubing
• Turbo back design replaces full stock exhaust
• Retains factory catalytic converter for compliance
• Boosts horsepower and torque under load
• Helps lower exhaust gas temperatures
• Increases fuel efficiency and throttle response
• Aggressive MBRP exhaust tone for diesel sound
• T409 stainless resists corrosion in most climates
• Single side exit for factory-style appearance
• Ideal for towing and daily driving setups
• Bolt-on installation with factory hanger compatibility
• Includes clamps and hardware for easy install

Give Your Diesel The Power And Voice It Deserves

If your 6.0L Powerstroke still sounds like it’s holding back, the MBRP S6212409 4-inch Turbo Back Exhaust is your ticket to unleashing that diesel muscle. Designed for the 2003–2007 Ford F250 and F350, this system gives you more than just a throatier tone—it delivers real-world performance you can feel. Whether you're towing, climbing grades, or just rolling around town, you'll notice quicker throttle response and more pull through the midrange. The aggressive sound reminds you you're driving a Powerstroke without being over the top during everyday cruising. Plus, it keeps your stock catalytic converter intact, so you get that extra grunt without crossing the emissions line in most areas. It’s a great fit for anyone who wants a strong upgrade without needing a race-only setup. Built to handle real work and daily abuse, it brings out the best in your truck while keeping things simple and reliable.

Crafted With Strength And Built To Flow Better

The MBRP S6212409 system is engineered with a turbo back layout, which replaces the entire exhaust path from the turbo outlet to the tailpipe. It’s constructed from 4-inch mandrel-bent T409 stainless steel, offering solid corrosion resistance and long-term durability at a more accessible price point than T304 systems. The improved flow characteristics help reduce backpressure and lower exhaust gas temperatures, which is especially helpful for extended towing or hard-working diesel builds. Designed to retain the factory catalytic converter, this system maintains emissions compliance outside of highly regulated states while still unlocking gains in horsepower and torque. Its single side exit matches the factory look while giving you more clearance and a smoother fit around suspension components. Installation is fully bolt-on and uses OEM-style hangers, so there’s no cutting, welding, or fabrication needed. With the included clamps and hardware, you’re set up for a clean install and a noticeable upgrade. It’s a well-balanced choice for performance-minded drivers who value durability and fitment as much as power.

Fits: 2003, 2004, 2005, 2006, 2007 Ford F250/F350 6.0L Powerstroke | Retains Factory Catalytic Converter

Notes:

• Fits 2003–2007 Ford F-250 and F-350 6.0L Powerstroke trucks
• Turbo back system replaces entire stock exhaust path
• Designed to retain the factory catalytic converter for emissions compliance
• Constructed from T409 stainless steel for strong corrosion resistance
• Best suited for moderate climates or daily use diesel applications
• Not legal for use in California or other emissions-restricted states
• Produces a deeper, more aggressive diesel exhaust note
• Uses factory-style hangers for an easy bolt-on installation
• Includes clamps and hardware necessary for installation
• Professional installation is recommended for best fit and alignment
• Backed by MBRP’s Limited Warranty for T409 stainless systems