6.7L Power Stroke Exhaust Manifolds (2011–2019) | BD Diesel
Ford 6.7L Power Stroke Exhaust Manifolds: The Complete Guide (2011–2019)
The 6.7L “Scorpion” is a workhorse, but its factory manifolds are known to warp, crack, and lose clamp load after years of heat-soak and towing. This guide explains why it happens, what BD changed in our hi-silicon ductile iron design, fitment by model year, and how to install for a one-and-done repair.
Why Stock Manifolds Fail (and the Symptoms You’ll See)
- Thermal cycling: Uneven wall thickness and short fasteners concentrate stress. Over time the casting warps and the seal opens up.
- Clamp load loss: Short studs and thin flanges don’t maintain preload after heat-soak. Exhaust leaks start—first as a cold tick, later a constant leak.
- Real-world symptoms: cold-start tick, exhaust odor under hood, slower turbo spool, higher drive pressure/EGT on grades, and broken studs during removal.
BD’s Fix: Thicker Casting, Smarter Hardware, Better Flow
- 75% thicker walls (≈0.275") in high-silicon ductile iron to resist warping and cracking.
- Longer exhaust studs + thick spacers across all 8 cylinders to improve thermal durability and retain clamp load.
- Thicker machined bolting flanges for stable joint compression.
- CFD-designed runners with verified gains: ’11–’14 average 189 cfm/port (vs OEM 173), ’15–’19 average 174 cfm/port (vs OEM 169). Ports are gasket-matched on ’15–’19.
- Fully EGR compatible, POR-15 high-temp coating, and all gaskets included (manifold, crossover, EGR port). ’15–’19 kit adds an M8 stud install tool.
- Legal everywhere: 50-state legal (CARB EO D-553-17). SEMA Cert: SC-BDD01-0050.
Which Kit Fits My 6.7L Power Stroke?
| Years / Configuration | What to Buy | Highlights |
|---|---|---|
| 2011–2014 F-250/F-350/F-450/F-550 | BD Manifold Kit (’11–’14) | Avg flow +9.3% (173→189 cfm/port) • Hi-Si ductile casting • longer studs/spacers • gaskets included • 50-state legal |
| 2015–2019 F-250/F-350/F-450/F-550 | BD Manifold Kit (’15–’19) | Avg flow +8.1% (169→174 cfm/port) • gasket-matched ports • includes M8 stud install tool • gaskets included • 50-state legal |
| Driver Side (Scorpion turbo kit users) | Driver Side Kit | Optimized for BD Scorpion layouts • includes 16 studs + spacers for kit use • 50-state legal |
| Passenger Side (2011–2014) | Passenger Side (’11–’14) | Avg flow +9.3% • studs, spacers, gaskets included • 50-state legal |
| Passenger Side (2015–2019) | Passenger Side (’15–’19) | Avg flow +8.1% • gasket-matched ports • M8 stud tool included • 50-state legal |
Notes: Replaces OEM: DC3Z9430A/DC3Z9431A (’11–’14); FC3Z9430B etc. (’15–’19). Trucks using an MPD budget SXE turbo kit must use PN 1043006 with an OEM passenger side manifold.
Install Overview & Real-World Tips
Estimated install time: ~9 hours (typical). Follow your service manual and BD instructions for sequence and torque specs.
- Penetrant & prep: Soak fasteners, especially rear ports. Have stud extractors ready; broken OEM studs are common.
- Surface check: Clean/inspect head sealing surfaces. Dry-fit gaskets and verify port alignment (’15–’19 are gasket-matched).
- Hardware matters: Use BD’s longer studs and spacers on all cylinders; they’re designed to hold clamp load through heat cycles.
- Tightening pattern: Center-out, criss-cross. Re-torque after first full heat cycle once cooled.
- EGR & crossover: New gaskets are included. Verify EGR tube seating and crossover alignment before final torque.
Warranty & Compliance
- Warranty: 36 months / 75,000 miles (parts).
- Emissions: 50-state legal (CARB EO D-553-17); SEMA Certification SC-BDD01-0050.
- Finish & durability: POR-15 high-temp black coating resists corrosion; hardware is black-oxide coated.
FAQ
Will these manifolds change power or spool?
Expect restored seal, steadier drive pressure, and improved consistency under load. Documented average flow gains help turbo efficiency—especially on tuned/towed trucks.
Are they EGR compatible?
Yes. All kits are fully EGR compatible and include the correct EGR port gaskets.
Do I need additional hardware?
No. Kits include the longest stud and spacer set for all cylinders plus manifold, crossover, and EGR gaskets. The ’15–’19 kit adds an M8 stud install tool.
• BD Manifold Kit — 2011–2014
• BD Manifold Kit — 2015–2019
• Passenger Side — 2011–2014 • Passenger Side — 2015–2019
• Driver Side Kit (Scorpion setups)
Always verify torque specs and procedures in the product’s installation instructions and your Ford service manual. Re-torque after the first complete heat cycle for long-term sealing.