Product Description
DIAMOND EYE K4306S is a 4.0" T409 stainless turbo-back system with a 3" (two-piece) downpipe and passenger-side single exit. It’s built to drop backpressure, lower EGTs, and give your OBS 7.3L a deep, clean tone while retaining everyday drivability.
Fitment Details
- Vehicle: 1994–1997.5 Ford F-250 / F-350 7.3L Power Stroke (all cab & bed lengths)
- Configuration: 4" turbo-back, 3" two-piece downpipe, single in/single out, passenger-side exit
- Material: T409 stainless steel
- Muffler: Included
- Catalyst note: System re-incorporates factory catalytic converter where equipped
Why Upgrade
- Mandrel bends for max flow and quicker turbo response
- Corrosion-resistant T409 for long service life in real-world climates
- Bolt-on layout with OE-style hangers for straightforward install
Cross-Reference / Alternatives (MBRP Only)
- MBRP S6218409 — 4" Turbo-Back, T409 Stainless, Single Side Exit w/ Muffler
- MBRP S6218AL — 4" Turbo-Back, Aluminized, Single Side Exit w/ Muffler
- MBRP S6218P — 4" Turbo-Back, Aluminized, Single Side Exit, No Tip
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4306S |
| UPC | 841963105728 |
| GTIN | 0841963105728 (UPC-A) |
| System Type | Turbo-Back, 4" main pipe, 3" two-piece downpipe |
| Exit | Single side, passenger-side |
| Material | T409 Stainless Steel |
| Muffler | Included |
| Shipping | Free Ground Shipping (continental U.S.) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
Installation Notes
- Cutting may be required for wheelbase-specific fitment.
- Reuses factory cat where equipped (94–97 trucks vary by market; check your truck).
FAQ: Will this fit my OBS 7.3L?
Yes—this kit is designed for 1994–1997.5 F-250/F-350 7.3L Power Stroke (all cab/bed lengths). Verify wheelbase and emissions equipment when ordering.
FAQ: Does it include a downpipe?
Yes, a 3" two-piece downpipe is included to replace the restrictive factory unit.
FAQ: What stainless grade is it?
T409 stainless steel—great heat resistance and value for daily-driven trucks.
