Product Description
Upgrade your OBS 7.3L Power Stroke’s exhaust flow with the DIAMOND EYE 122004 3" two-piece turbo downpipe. Mandrel bends and a true 3" diameter help reduce backpressure and EGTs while freeing up horsepower and throttle response—all in a durable aluminized steel kit that fits 1994–1997.5 F-250/F-350 models.
Fitment
- 1994–1997.5 Ford F-250 / F-350, 7.3L Power Stroke (OBS)
- Body/bed: all cab and bed lengths
- Material: Aluminized steel, 3" OD, two-piece design
- Emissions: CARB EO D-778 / D-778-1 (eligible for use in California on listed applications)
Why Choose This Downpipe
- Mandrel-bent 3" tubing improves flow vs. restrictive factory outlet
- Two-piece design eases installation in the tight OBS engine bay
- Aluminized construction balances durability and value
Cross-Reference / Alternatives (Diamond Eye Only)
- Stainless version: DIAMOND EYE 162004
- First section with O2 bung: DIAMOND EYE 162002
- Second section with O2 bung: DIAMOND EYE 162003
Helpful Notes
- Some trucks may require minor clearance adjustment at the firewall pinch seam during installation.
- If your truck retains a factory cat flange, keep or modify as needed during install.
Specifications
| Specifications for DIAMOND EYE 122004 | |
|---|---|
| Brand | Diamond Eye Performance |
| Part Number | 122004 |
| Material | Aluminized steel |
| Diameter | 3 in (76 mm) |
| Configuration | 2-piece downpipe kit |
| Emissions | CARB EO D-778 / D-778-1 |
| UPC | 841963111873 |
| GTIN | 0841963111873 (GTIN-12) |
| Shipping Weight | ~11 lb |
| Package Dimensions | ~25.9" x 9.2" x 6.1" |
| Shipping Method | Standard ground |
| Country of Origin | USA (manufacturer/retailer listings) |
| Prop 65 | WARNING: Cancer and Reproductive Harm – P65Warnings.ca.gov |
FAQ
Will this fit all 1994–1997.5 F-250/F-350 7.3L trucks?Yes—this kit is designed for OBS 7.3L Power Stroke F-250/F-350 across cab/bed configs for 1994–1997.5 model years.
Is it legal in California?Yes—this downpipe family is covered under CARB Executive Orders D-778 and D-778-1 for listed applications.
Do I need to modify the firewall pinch seam?Some trucks may require minor bending/clearancing at the firewall seam to gain adequate space for the 3" pipe.
Does this include an oxygen sensor bung?This 122004 kit is the common aluminized version; for O2-bung sections, use Diamond Eye 162002 (first section) and 162003 (second section).
