Product Description
MBRP FS9449 is a 4-inch Armor Plus (T409 stainless) exhaust pipe adapter designed for regular cab installations on 2003–2007 Ford F-250/F-350 Super Duty trucks equipped with the 6.0L Power Stroke. Built from rugged T409 stainless and jig-manufactured for precise fit, it’s a simple, durable solution to complete your system.
Fitment
- 2003, 2004, 2005, 2006, 2007 Ford F-250/F-350 Super Duty
- Engine: 6.0L Power Stroke diesel
- Cab/Bed: Regular Cab / Long Bed (RC/LB) applications
- Pipe Size: 4-inch adaptor, Armor Plus (T409 stainless)
Cross-Reference / Alternatives (MBRP-only)
If you need a different size transition or a universal adapter for a custom setup, consider these MBRP options:
- MBRP UA1007 – 3.5" ID to 4" OD Stainless Adapter
- MBRP UA2001 – 4" ID to 5" OD Aluminized Adapter
- MBRP UA2003 – 3.5" ID to 5" OD Aluminized Adapter
- MBRP UA2004 – 4" ID to 5" ID Aluminized Adapter
- MBRP UA2005 – 3.5" OD to 5" ID Aluminized Adapter
- MBRP UA2007 – 3.5" OD to 4" OD Aluminized Adapter
UPC
882963100610
Why Buy Armor Plus (T409)
T409 stainless offers strong corrosion resistance for daily-driven trucks in mixed climates and is backed by MBRP’s lifetime warranty on Armor Plus components.
FAQ
Will this adapter fit any 2003–2007 6.0L, or only Regular Cab/Long Bed?This piece is specifically intended for Regular Cab installations and commonly used on RC/LB trucks. For other cab/bed configurations, check your system layout and consider the universal MBRP adapters above.
What material is it made from?
Armor Plus uses T409 stainless steel for strength and corrosion resistance with a lifetime warranty on the part.
Is welding required?
Most installs can be clamped, but welding provides the most secure, leak-resistant connection. Your setup may vary based on other exhaust components.
Will this change my truck’s sound?
It doesn’t add a muffler or resonator; it simply adapts pipe size/position. Any sound change is incidental to improved flow or system configuration.
What size is the adapter?
It’s a 4-inch adaptor used to complete Regular Cab 6.0L layouts for 2003–2007 F-250/F-350 systems.
