Product Description
Unlock exhaust flow and turbo response on your 2008–2010 Ford Super Duty 6.4L Power Stroke with the MBRP FS9455 4" Turbo Down Pipe. Built from durable T409 stainless steel with a two-piece, mandrel-bent design, this Armor Plus series pipe is engineered for easier installation, quicker spool, lower EGTs, and long-term durability.
Fitment
- 2008–2010 Ford F-250 Super Duty — 6.4L Power Stroke (V8)
- 2008–2010 Ford F-350 Super Duty — 6.4L Power Stroke (V8)
- 2008–2010 Ford F-450 Super Duty — 6.4L Power Stroke (V8)
CARB Notice: Not legal for sale or use in California on pollution-controlled vehicles.
Specifications
| Brand / Series | MBRP — Armor Plus |
| Part Number | FS9455 |
| Material | T409 Stainless Steel |
| Pipe Diameter | 4.0 in (101.6 mm) |
| Design | Two-piece, mandrel-bent |
| Hardware Included | Yes |
| Finish | Natural |
| Warranty | Limited Lifetime (Armor Plus) |
| UPC | 882663111947 |
Cross-Reference / Alternatives (MBRP Only)
- MBRP FALCA455 — Aluminized 4" Turbo Down Pipe (08–10 6.4L)
- MBRP FS9CA455 — Stainless 4" Turbo Down Pipe (08–10 6.4L)
- MBRP S6282AL — 4" Filter-Back w/ Down Pipe, Single Side Exit (08–10 6.4L)
Why Buy From CPP Diesel
- Real product expertise for Ford Power Stroke platforms
- Fast shipping and responsive support
- Hand-vetted MBRP catalog with verified fitment
Helpful Notes
- Soak factory fasteners in penetrating oil prior to removal to ease disassembly.
- Verify all clamps and connections after the first heat cycle.
- For California compliance, consider the aluminized FALCA455 alternative above (see product details).
FAQ
Will this fit my 2008–2010 6.4L Power Stroke without other exhaust mods?Yes. The FS9455 is designed specifically for 2008–2010 Ford F-250/F-350/F-450 6.4L Power Stroke trucks and integrates with the rest of the exhaust path. Always confirm your model year and engine before ordering.
What benefits should I expect from a 4" T409 stainless down pipe?
Reduced backpressure improves turbo spool and helps lower EGTs. T409 stainless resists corrosion better than aluminized steel, making it a strong choice for long-term durability.
Is the FS9455 legal in California?
No. The FS9455 is not CARB legal. If you need a California-compliant option, review the MBRP FALCA455 alternative linked above and check the EO information on that product page.
What size is the pipe and does it include hardware?
The pipe is 4.0 inches in diameter and includes necessary installation hardware. See the specifications table for details.
