MBRP FS9459 4-Inch Armor Plus Turbo Downpipe T409 Stainless Steel

The MBRP FS9459 Armor Plus Turbo Downpipe is engineered to replace the restrictive factory downpipe and dramatically improve exhaust flow, resulting in increased horsepower, better throttle response, and reduced exhaust gas temperatures (EGTs). This direct-fit replacement is designed for diesel performance enthusiasts seeking measurable gains without compromising durability.

Construction and Design:

• Constructed from heavy-duty 16-gauge T409 stainless steel for excellent corrosion resistance and long-term durability
• Features a full 4-inch diameter throughout for maximum exhaust flow
• Mandrel-bent tubing ensures smooth, ripple-free bends that eliminate flow restrictions
• Jig-manufactured for precise fitment and retains factory mounting points

Performance Benefits:

• Significantly increases exhaust flow over the restrictive factory downpipe
• Reduces exhaust gas temperatures to help protect engine components and improve longevity
• Delivers noticeable improvements in throttle response and overall engine performance
• Allows diesel engines to breathe more efficiently, resulting in better power delivery

Warranty and Quality:

• Backed by MBRP's lifetime warranty against defects in materials and workmanship
• T409 stainless steel provides excellent rust and corrosion resistance in moderate climates
• Easy to clean and maintain for long-lasting appearance

Important Notes: This is an off-road/racing product. Removal of OEM catalytic converters may violate federal and local emissions laws. Verify that this product is legal for your intended use and jurisdiction. Not legal for sale or use in California or other states with similar emissions regulations.