4 inch Cat Back Exhaust System Single Side T409 Stainless

Features:

• Fits 2006–2007 Silverado/Sierra 2500HD and 3500HD
• Engineered for 6.6L Duramax LBZ diesel engines
• 4" mandrel-bent tubing improves exhaust flow
• T409 stainless steel for long-lasting durability
• Single side exit with clean OEM-style fitment
• Increases torque and horsepower under load
• Reduces exhaust gas temperatures efficiently
• Signature MBRP sound with deeper diesel tone
• Improves throttle response and pulling power
• Bolt-on installation using factory hanger points
• Includes all clamps and hardware for install
• Designed for work-ready and performance builds

Unlock The Full Potential Of Your Duramax

Your 2006–2007 Silverado or Sierra 2500HD or 3500HD with the 6.6L Duramax LBZ already has the muscle, but the MBRP S6012409 Cat Back Exhaust System gives it the roar and response to match. With a deep, aggressive diesel tone and improved airflow, this system turns every press of the throttle into something you can feel and hear. Whether you're towing heavy equipment or cruising through town, the added power and sharper response make your truck feel more alive and capable. The T409 stainless steel construction is tough enough to handle real-world abuse while giving you the confidence that your exhaust won't give up under pressure. It keeps your engine cooler under load and helps bring out a noticeable improvement in torque and throttle feel. The single side exit keeps the truck looking clean while still showing off that performance edge. If you want to upgrade your diesel’s sound, power, and presence without going overboard, this system strikes the perfect balance.

Designed To Flow More Cool Better And Last Longer

The MBRP S6012409 Cat Back Exhaust System is engineered specifically for the 2006–2007 6.6L Duramax LBZ platform to improve overall efficiency and reliability under real working conditions. It uses 4-inch mandrel-bent tubing to reduce restriction and allow exhaust gases to exit more freely, which plays a key role in lowering exhaust gas temperatures during towing and hauling. Cooler temps help the engine maintain consistent power and reduce stress on vital components over time. Built from T409 stainless steel, this system offers excellent corrosion resistance and is ideal for trucks that see mixed climates and heavy-duty use. The single side exit configuration maintains an OEM-style appearance while still improving flow and performance. Installation is straightforward thanks to a bolt-on design that utilizes factory hanger points and includes all necessary clamps and hardware. From jobsite duties to weekend towing, this system provides reliable gains in performance and durability without the hassle of extensive modifications. It's a well-rounded upgrade for any Duramax owner looking to step up their truck's efficiency and tone.

Fits: 2006, 2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LBZ

Notes:

• Fits 2006–2007 Silverado and Sierra 2500HD/3500HD with 6.6L Duramax LBZ engine
• Designed for use with crew cab and extended cab models
• Single side exit maintains clean OEM-style appearance
• T409 stainless steel offers long-term corrosion resistance
• Recommended for mixed climate use including snow and road salt
• System replaces exhaust from the catalytic converter back
• Produces a deeper and louder diesel tone than stock
• May require trimming based on bed or cab length
• Uses factory hanger locations for an easy bolt-on installation
• Includes all required clamps and mounting hardware
• Compatible with trucks not equipped with a factory DPF
• Covered by MBRP’s limited lifetime warranty for T409 systems