MBRP S6004409 4 Inch Cat-Back Single Side Exit Exhaust System T409 Stainless Steel

The MBRP S6004409 is a complete 4-inch cat-back exhaust system engineered specifically for 2001-2007 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L Duramax diesel engine in Extended Cab or Crew Cab configurations. Part of MBRP's Armor Plus Series, this system delivers enhanced exhaust flow, improved performance, and an aggressive exhaust tone while maintaining excellent durability.

Key Features:

• T409 Stainless Steel Construction: Corrosion-resistant material designed to protect against penetrating rust and withstand harsh conditions
• 4-Inch Mandrel-Bent Tubing: Smooth bends without rippling ensure maximum exhaust flow and reduced backpressure for increased power and efficiency
• Single Side Exit Design: Clean, aggressive appearance with a 5-inch outer diameter mirror-polished stainless steel tip
• Includes 4-Inch Front Pipe: Designed for vehicles not equipped with a catalytic converter
• Bolt-On Installation: Direct-fit replacement for the factory exhaust system (some cutting may be required)
• Lifetime Warranty: MBRP backs this system with a manufacturer's lifetime warranty against defects

Performance Benefits:

Mandrel-bent tubing allows for unrestricted exhaust flow, helping your Duramax engine breathe more efficiently. This improved flow can result in better throttle response, increased horsepower and torque, improved fuel economy, and reduced exhaust gas temperatures. The larger 4-inch diameter tubing significantly reduces backpressure compared to the restrictive factory exhaust system.

What's Included:

• Complete cat-back exhaust system with all necessary pipes and components
• 4-inch front pipe section
• 5-inch OD polished stainless steel tip
• All required mounting hardware and clamps

Important Notes:

While T409 stainless steel offers excellent resistance to penetrating rust, exposure to heavy salt, winter road treatments, and extreme coastal conditions may accelerate surface corrosion. These environmental factors are not covered under warranty unless the component fails completely. The T409 material is easy to clean and maintain, making it an excellent value-oriented choice for most climates.

Compatibility:

• 2001-2007 Chevrolet Silverado 2500 HD / 3500 HD with 6.6L Duramax diesel (Extended Cab or Crew Cab only)
• 2001-2007 GMC Sierra 2500 HD / 3500 HD with 6.6L Duramax diesel (Extended Cab or Crew Cab only)
• Not compatible with Regular Cab / Standard Cab models