Product Description
DIAMOND EYE K5371A is a 5.0" aluminized steel DPF-back exhaust system for 2008–2010 Ford F-250/F-350 6.4L Power Stroke (all cab & bed lengths). This kit routes a single passenger-side exit, includes the downpipe kit #125102, and ships with a vented stainless tip for a clean, near-OE look and improved flow after the DPF.
Designed and built in the USA, Diamond Eye uses CNC mandrel bends to maintain consistent diameter through curves for lower backpressure and durable fitment. This system is C.A.R.B. Exempt under EO D-778, making it a legal performance upgrade for 50-state, emissions-equipped trucks when installed as directed.
FAQ: WILL THIS FIT MY TRUCK?
Yes—if you have a 2008, 2009, or 2010 Ford Super Duty F-250/F-350 with the 6.4L Power Stroke and the factory DPF in place. It fits all cab and bed lengths.
FAQ: DOES IT INCLUDE A MUFFLER?
No muffler is included. This is a DPF-back system that uses large-diameter tubing for sound and flow. Tone remains emissions-compliant since the factory DPF stays in place.
FAQ: WHAT ELSE IS INCLUDED?
The kit includes the downpipe kit #125102, clamps/hardware, and a vented stainless tip. Reuse factory hangers where applicable.
Fitment Details
- Make/Engine: Ford Super Duty F-250 / F-350, 6.4L Power Stroke
- Years: 2008–2010
- Configuration: DPF-back, single passenger-side exit
- Cab/Bed: All cab & bed lengths
- Compliance: C.A.R.B. EO D-778 (emissions-equipped vehicles)
Cross Reference Items
- K5371S — Stainless 5" DPF-back (same layout, stainless construction)
- K5364S — Stainless 5" DPF-back variant for 6.4L (alternate stainless option)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K5371A |
| System Type | DPF-Back, single exit (passenger side) |
| Tubing Diameter | 5.0" |
| Material | Aluminized steel |
| Included Components | Downpipe kit #125102, vented stainless tip, clamps/hardware |
| C.A.R.B. | EO D-778 |
| UPC | 841963121681 |
| GTIN | 0841963121681 (GTIN-12 / UPC-A) |
| Shipping Weight | ~75 lb |
| Package Dimensions | 52" × 21" × 13" |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
Notes: Keep the DPF and emissions equipment intact. Follow all local/state laws. Professional installation recommended.
