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Diamond Eye 122004 3" Aluminized 2-Piece Downpipe Kit – 1994–1997.5 Ford 7.3L Powerstroke (OBS)
Upgrade one of the biggest restrictions on your OBS 7.3L Powerstroke with the Diamond Eye 122004 3-inch turbo downpipe kit. The factory downpipe is notoriously flat and restrictive (often called the “pancake” pipe). This direct-fit 2-piece aluminized steel replacement uses smooth mandrel bends and a true 3" diameter to dramatically improve exhaust flow right off the turbo.
Key Benefits
- Increased exhaust flow and reduced backpressure
- Lower exhaust gas temperatures (EGTs)
- Quicker turbo spool and stronger low-end response
- Modest horsepower and torque gains
- Better overall drivability on stock or modified trucks
- Ideal foundation for any 3" aftermarket exhaust system
Features
- 3" mandrel-bent aluminized steel construction
- Two-piece design for easier installation in the tight OBS engine bay
- Direct-fit to the factory turbo outlet
- Bottom flange bolts to the factory catalytic converter (can be cut off if running cat-delete)
- Compatible with automatic and manual transmissions
- Fits all cab and bed configurations
- CARB EO #D-778 / D-778-1 approved
Fitment: 1994–1997.5 Ford F-250 & F-350 with 7.3L Powerstroke diesel with factory installed catalytic converter.
This is one of the most popular and effective first modifications for OBS 7.3 owners looking for better performance, lower EGTs, and improved exhaust flow without a full system replacement.
Diamond Eye 122004 3" Aluminized 2-Piece Downpipe Kit – 1994–1997.5 Ford 7.3L Powerstroke (OBS)
Upgrade one of the biggest restrictions on your OBS 7.3L Powerstroke with the Diamond Eye 122004 3-inch turbo downpipe kit. The factory downpipe is notoriously flat and restrictive (often called the “pancake” pipe). This direct-fit 2-piece aluminized steel replacement uses smooth mandrel bends and a true 3" diameter to dramatically improve exhaust flow right off the turbo.
Key Benefits
Increased exhaust flow and reduced backpressure
Lower exhaust gas temperatures (EGTs)
Quicker turbo spool and stronger low-end response
Modest horsepower and torque gains
Better overall drivability on stock or modified trucks
Ideal foundation for any 3" aftermarket exhaust system
Features
3" mandrel-bent aluminized steel construction
Two-piece design for easier installation in the tight OBS engine bay
Direct-fit to the factory turbo outlet
Bottom flange bolts to the factory catalytic converter (can be cut off if running cat-delete)
Compatible with automatic and manual trans[...]
Diamond Eye 122004 3" Aluminized 2-Piece Downpipe Kit – 1994–1997.5 Ford 7.3L Powerstroke (OBS)
Upgrade one of the biggest restrictions on your OBS 7.3L Powerstroke with the Diamond Eye 122004 3-inch turbo downpipe kit. The factory downpipe is notoriously flat and restrictive (often called the “pancake” pipe). This direct-fit 2-piece aluminized steel replacement uses smooth mandrel bends and a true 3" diameter to dramatically improve exhaust flow right off the turbo.
Key Benefits
- Increased exhaust flow and reduced backpressure
- Lower exhaust gas temperatures (EGTs)
- Quicker turbo spool and stronger low-end response
- Modest horsepower and torque gains
- Better overall drivability on stock or modified trucks
- Ideal foundation for any 3" aftermarket exhaust system
Features
- 3" mandrel-bent aluminized steel construction
- Two-piece design for easier installation in the tight OBS engine bay
- Direct-fit to the factory turbo outlet
- Bottom flange bolts to the factory catalytic converter (can be cut off if running cat-delete)
- Compatible with automatic and manual transmissions
- Fits all cab and bed configurations
- CARB EO #D-778 / D-778-1 approved
Fitment: 1994–1997.5 Ford F-250 & F-350 with 7.3L Powerstroke diesel with factory installed catalytic converter.
This is one of the most popular and effective first modifications for OBS 7.3 owners looking for better performance, lower EGTs, and improved exhaust flow without a full system replacement.
Q
Jesus • 07/02/2025, 3:09:02 AM
Is this item California legal.
A
07/10/2025, 3:25:36 PM
Available to ship to CA
Q
Tim • 07/20/2025, 1:27:03 AM
Does the cab of a 95 F350 need to be modified to provide clearance for the pipe?
A
07/21/2025, 8:37:19 PM
Typically there is a lip inside the firewall that needs to be bent slightly for clearance. Easy modification.
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5/5 Stars out of 2 Reviews
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Marcus Bentley | June 18th, 2025
The upper flange is welded to close to the turbo and will not mate up flush without hitting the engine block or the up pipes. That’s without the bottom connected. I have called and tried to discuss this but keep getting forwarded to a voicemail and no one has returned my call
Clyde Horn (Hamilton) | September 14th, 2023
Astounding results literally blown away with this much pressure. Now if the wife only well lol nevermind that thank you guys this trucks really turning into a beast.
Proposition 65 Warning Information -
P65Warnings.ca.gov
Fits: 7.3 Powerstroke 1994-1997 (Pickup)
California Restricted
Fits: 7.3 Powerstroke 1994-1997 (Without Factory Catalytic Converter)
Fits: 7.3 Powerstroke 1994-1997 (Pickup)
California Restricted
Fits: 7.3 Powerstroke 1994-1997