Product Description
Upgrade the flow on your 6.0L Power Stroke with the DIAMOND EYE 165031 second-section turbo downpipe. This Performance Series, 3.5" ID/OD section eliminates the factory restriction after the turbo elbow to reduce backpressure, improve spool, and lower EGTs.
Fitment
- Make/Model: Ford F-250 / F-350 Super Duty
- Engine: 6.0L Power Stroke Diesel
- Years: 2003–2007
- Position: Turbo Downpipe – Second Section
- Diameter: 3.5" Inlet / 3.5" Outlet
- Oxygen Sensor Bung: None (no bung)
- Material/Series: 409 Stainless, Performance Series
- Cab/Bed: All cab sizes and bed lengths
Why CPP Diesel
- Genuine Diamond Eye parts for proven fit and durability
- Fast, free shipping on most orders
- U.S.-based diesel experts and hassle-free returns
Cross-Reference / Alternatives (Diamond Eye only)
- First Section (pairs with this part): DIAMOND EYE 165030
- 08–10 6.4L Alternative (different fitment): DIAMOND EYE 165102
- 94–97.5 7.3L Second Section (different fitment): DIAMOND EYE 162003
- 94–97.5 7.3L Second Section (no bung, aluminized – different fitment): DIAMOND EYE 122003
- 94–97.5 7.3L First Section (different fitment): DIAMOND EYE 162002
Helpful Notes
- This is the second section only; for a complete downpipe assembly on 03–07 trucks, pair with 165030.
- Designed for improved flow; verify local emissions compliance before installation.
Specifications
| Specification | Value |
|---|---|
| Brand | Diamond Eye Performance |
| Part Number | 165031 |
| SKU (CPP) | DEM165031 |
| UPC | 841963112948 |
| GTIN | 00841963112948 |
| Material | 409 Stainless Steel |
| Diameter | 3.5" Inlet / 3.5" Outlet |
| Section | Turbo Downpipe – Second Section |
| Finish | Natural |
| Country of Origin | USA |
| Shipping Weight | ~12 lb |
| Package Dimensions | 53" L × 13" H × 9" W |
| Shipping Method | Ground (Free Shipping where noted) |
| Prop 65 | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
FAQ
Does 165031 include the first section of the downpipe?No. This is the second section only. For 03–07 trucks, add 165030 to complete the assembly.
Is there an oxygen sensor bung on this pipe?
No. 165031 is produced without an O2 bung.
What size is the pipe?
3.5" inlet and 3.5" outlet, matching the 6.0L Power Stroke Performance Series layout.
What material is used?
409 stainless steel for durability and corrosion resistance.
Will this fit all cab and bed configurations?
Yes, it’s specified for all cab sizes and bed lengths on 2003–2007 F-250/F-350 6.0L Power Stroke.
