Product Description
DIAMOND EYE K4338S is a 4.0" T409 stainless steel cat-back exhaust system engineered for the 2003.5–2007 Ford F-250/F-350 Super Duty 6.0L Power Stroke. This single side-exit system includes a straight-through muffler to reduce backpressure and deliver a clean, deep tone while withstanding heavy towing and high EGTs.
FAQ: WILL IT FIT MY TRUCK?
Yes—this kit is designed for 2003.5–2007 6.0L Power Stroke F-250/F-350 models (all cab/bed lengths). It installs catalytic converter back using factory-style hangers and hardware. Always verify model year split (2003.5+) before ordering.
FAQ: WHAT’S INCLUDED?
4" T409 SS mandrel-bent tubing, straight-through muffler, single side-exit tailpipe, band clamps, and hangers. Replacement-pipe (no-muffler) and aluminized variants are available separately if you prefer a louder tone or different material.
FAQ: EMISSIONS / LEGALITY
This is a cat-back system—no modification to emissions components is required. Do not remove any catalytic converters where equipped.
Fitment Details
- Make/Model: Ford F-250/F-350 Super Duty
- Engine: 6.0L Power Stroke Diesel
- Years: 2003.5, 2004, 2005, 2006, 2007
- Configuration: All cab and bed lengths
- System Type: 4" cat-back, single side exit, includes muffler
Cross-Reference & Related Items
- K4338S-RP — Replacement Pipe (409 SS), single side exit, no muffler (louder)
- K4338A — Aluminized steel version with muffler (budget-friendly alternative)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4338S |
| Material | T409 Stainless Steel |
| Main Tubing Diameter | 4.0" |
| Exit | Single Side |
| Includes Muffler | Yes (straight-through) |
| UPC | 841963107746 |
| GTIN | 0841963107746 (UPC-A) |
| Shipping Weight (approx.) | 90 lb |
| Package Dimensions (approx.) | 60" x 20" x 20" |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
Installation Notes: Hand tools required; do not fully tighten clamps until final alignment. Retains factory emissions equipment.
