Product Description
DIAMOND EYE K4321A is a 4.0" aluminized turbo-back dual-exit exhaust system engineered for the 2000–2003.5 Ford F-250/F-350 Super Duty 7.3L Powerstroke (all cab/bed lengths) with automatic transmission and non-catalyst models. It replaces the factory system from the turbo outlet back, reducing backpressure and improving flow for a deeper tone and measurable performance gains.
FAQ: WILL THIS FIT MY TRUCK?
Yes—if you have a 7.3L Powerstroke 2000–early 2003 (2003.5) Super Duty with an automatic transmission and non-catalyst configuration. Fits all cab and bed lengths. Always confirm model year/Emissions equipment before purchase.
FAQ: WHAT IS THE EXIT STYLE?
This kit is single in / dual out with split rear/side exits and includes a muffler for a controlled, deep sound.
FAQ: WHAT MATERIAL IS IT?
Aluminized steel (mandrel-bent) for a balance of durability and value. Stainless options are available in companion part numbers.
Fitment Details
- Platform: 2000–2003.5 Ford F-250/F-350 Super Duty, 7.3L Powerstroke
- Configuration: Automatic transmission, non-catalyst models
- Body: All cab & bed lengths
- System Type: 4.0" turbo-back, single in / dual out, split rear/side, with muffler
Cross-Reference / Related Items
- K4321A-RP — Aluminized, no muffler version (muffler delete)
- K4321S — 409 stainless, dual-exit with muffler
- K4321S-RP — 409 stainless, dual-exit, no muffler
- Installation Sheet: Diamond Eye K4321A instructions (PDF)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4321A |
| UPC | 841963125092 |
| GTIN | 0841963125092 (GTIN-12 / UPC-A) |
| Material | Aluminized steel, mandrel-bent |
| Exit | Split rear/side (dual) |
| Includes Muffler | Yes |
| Shipping Info | Free Shipping (contiguous U.S.) |
| Package Dimensions | Approx. 52" (L) x 21" (H) x 13" (W) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
