MBRP S6004AL 4 Inch Cat-Back Exhaust System Aluminized Steel Silverado Sierra Duramax

The MBRP S6004AL is a complete 4-inch cat-back exhaust system designed specifically for 2001-2007 Chevrolet Silverado and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L Duramax diesel engine. This Armor Lite Series system delivers exceptional performance and sound at an outstanding value, utilizing heavy-gauge aluminized steel construction that resists damage from road debris while providing excellent durability in dry climates.

Key Features:

• 4-inch mandrel-bent aluminized steel tubing for maximum exhaust flow and zero rippling in bends
• Single side exit configuration with mirror-polished 5-inch outer diameter tip
• Includes 4-inch front pipe for vehicles not equipped with a catalytic converter
• Bolt-on installation design for straightforward fitment (cutting may be required)
• Enhanced exhaust tone that delivers aggressive diesel sound
• Improves engine breathing for increased horsepower and torque
• Fits Extended Cab and Crew Cab body styles only

MBRP's Armor Lite Series provides the same precise fitment, performance gains, and distinctive exhaust note as their premium stainless steel systems, making it an ideal choice for diesel enthusiasts seeking maximum value without compromising quality. The mandrel-bent construction ensures smooth, unrestricted exhaust flow that helps your Duramax engine run cooler and more efficiently while producing more usable power throughout the RPM range.

Note: This system is designed for off-road use or vehicles without catalytic converters. Some cutting and modification may be required during installation to achieve proper fitment.