Product Description
Upgrade exhaust flow and lower EGTs with the MBRP FS9459 4" Turbo Down Pipe. Built from corrosion-resistant T409 stainless (Armor Plus/XP Series), this direct-fit downpipe replaces the restrictive factory unit on early 6.7L trucks to improve response and help your Super Duty breathe easier—while keeping factory emissions equipment in place.
- 4" mandrel-bent T409 stainless for durability
- Jig-built for consistent fit and easy bolt-on install
- Designed to work with OEM emissions components
Fitment
- 2011–2014 Ford F-250 / F-350 / F-450 Super Duty 6.7L Power Stroke — all cabs & beds
- 2015 Ford F-250 / F-350 / F-450 6.7L Power Stroke — Cab & Chassis only
- Note: For 2015–2016 non–Cab & Chassis trucks, see stainless FS9460 or aluminized FAL460 below.
Cross-Reference / Alternatives (MBRP only)
- MBRP FS9460 — 4" T409 Stainless, 2015–2016 Ford 6.7L (Non Cab & Chassis)
- MBRP FAL460 — 4" Aluminized, 2015–2016 Ford 6.7L (Non Cab & Chassis)
- MBRP FALCA460 — 4" Aluminized, 2015–2016 Ford 6.7L Cab & Chassis
- MBRP FS9CA460 — 4" T409 Stainless, 2015–2016 Ford 6.7L (Non Cab & Chassis)
- MBRP FS9CA459 — 4" Stainless, 2011–2015 Ford 6.7L (alt. stainless listing)
FAQs
Will FS9459 fit my 2015 Super Duty?
FS9459 fits 2015 Cab & Chassis trucks. If your 2015 is a regular pickup (non–Cab & Chassis), use the stainless FS9460 or aluminized FAL460 instead.
Is this emissions legal?
When used with intact factory emissions equipment, MBRP 4" downpipes for these applications carry CARB EO D-763-1. Always confirm local regulations and the EO coverage for your specific configuration.
What’s the difference between T409 stainless and aluminized?
T409 stainless (FS9459, FS9460) offers stronger corrosion resistance than aluminized steel (FAL460/FALCA460), making it a better choice for salted winter roads and long-term durability. Aluminized is a solid, budget-friendly alternative in milder climates.
Do I need tuning or other parts to install this?
No tuning required. FS9459 is a direct-fit bolt-on that reuses factory mounting points and works with stock emissions equipment and your existing DPF/filter-back exhaust.
