Ford Powerstroke 6.4L - 4" Downpipe Back Exhaust System (2008-2010)
Type: Exhaust Systems
Built for performance. Tuned for power.
This downpipe-back exhaust system is designed to optimize flow and unleash the true sound of your 6.4L Powerstroke. Constructed from corrosion-resistant T409 stainless steel, it delivers aggressive tone, reduced backpressure, and enhanced throttle response—ideal for off-road and race applications.
The 4" Downpipe-Back Exhaust System for the 2008–2010 Ford Powerstroke 6.4L removes factory restrictions to maximize flow and performance. Installed directly behind the stock downpipe and running to the tailpipe with no muffler, it creates a bold, race-ready exhaust note and lower EGTs under load. Everything needed for installation is included in the box.
Vehicle Fitment
Compatible Vehicles
- 2008 Ford F-250 / F-350 6.4L Powerstroke Pickup
- 2009 Ford F-250 / F-350 6.4L Powerstroke Pickup
- 2010 Ford F-250 / F-350 6.4L Powerstroke Pickup
Not Compatible With
- Cab & Chassis models
- Vehicles requiring emissions compliance on public roads
Specifications
| Component | Description |
|---|---|
| Pipe Diameter | 4 inches |
| Material | T409 Stainless Steel |
| System Type | Downpipe-Back |
| Muffler | None – straight-pipe design |
| Installation Hardware | OE-style clamps and hangers included |
| Application | Off-road and competition use only |
What’s Included
- 4" T409 stainless steel downpipe-back exhaust system
- OE-style hangers
- Clamps and hardware for complete installation
- Tailpipe section (no muffler)
Key Features
- High-strength T409 stainless steel construction for corrosion resistance
- Full downpipe-back system replaces all exhaust to the tailpipe
- No-muffler design creates a loud, aggressive tone
- Lower backpressure and improved exhaust gas evacuation
- Reduces EGTs under load, improving engine protection
- Straightforward bolt-on install with included hardware
Benefits
- Louder, more aggressive exhaust note
- Better turbo spool and mid-range torque
- Enhanced towing and throttle response
- Ideal for racing, sled pulling, and high-output diesel builds
- Built to last with durable stainless steel tubing
Important Notes:
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Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
