Exhaust system upgrades for owners of the 6.7 Powerstroke delete pipe diesel engine, found in most Ford Super Duty trucks, are one of the popular means of performance and efficiency enhancements. A significant modification considered by most enthusiasts is a delete pipe, especially when referring to the removal of the Diesel Particulate Filter (DPF). Though it has the potential to deliver a notable effect, this upgrade does carry legal and practical implications.
What is a Delete Pipe?
A delete pipe replaces the Diesel Particulate Filter in the exhaust system. The DPF is a factory-installed component that captures and burns off soot emissions from diesel engines to make them comply with environmental regulations. Though effective at reducing emissions, the DPF creates back pressure in the exhaust system, which can reduce airflow and, consequently, engine efficiency.
A DPF delete pipe takes away the filter by deleting it; this makes free flow possible from exhaust gases. Such a modification is usually coupled with ECU, Engine Control Unit tune, to turn DPF-related sensors off and have the engine not produce error codes.
Benefits of a 6.7 Powerstroke Delete Pipe
Improved Performance:
Removing the DPF reduces back pressure in the exhaust system; this can lead to horsepower and torque gains.
The spooling times of the turbos might reduce their throttle response times.
Fuel Efficiency Improves:
Reduced exhaust back-pressure and therefore can improve the fuel efficiency.
Lowered Maintenance Costs:
The DPF needs to burn-off soot through regenerative cycles. The exhaust is rich in fuel during these cycles, causing the system strain.
Removal of the DPF will negate the need for such regenerative cycles. Also, the chances of costly DPF-related repairs decrease.
Clearer Exhaust Sound
A delete pipe enables a louder exhaust note, which many diesel enthusiasts prefer.
Considerations and Legal Implications
Emissions Compliance:
In most regions, including the United States, removing the DPF is illegal under the Clean Air Act. Vehicles without emissions control devices may fail inspections or incur significant fines.
Trucks used exclusively for off-road or competition purposes are usually exempt from these regulations, but this must be explicitly stated.
Void Warranty:
Modifying the exhaust system with a delete pipe can void the manufacturer’s warranty.
Engine Longevity:
Without the DPF, exhaust temperatures may decrease, which can benefit engine components. However, improper tuning or poor-quality parts could negatively impact the engine’s durability.
Installation and Tuning
Installing a delete pipe requires removing the DPF and replacing it with a custom-fitted pipe.
This process usually involves:
Adjusting or reprogramming the ECU to disable DPF-related functions.
Ensure proper fitment of the delete pipe to avoid leakages or alignment issues.
Professional installation is recommended to make sure the modification is properly done and safe.
DPF Delete Pipes: Options and Brands
There are quite a few manufacturers that specifically make delete pipes for the 6.7 Powerstroke, generally for off-road or competition usage:
Flo~Pro- Provides very durable and well-manufactured pipes that fit just about any setup.
Diamond Eye- They are best known for their high quality materials and easy installation.
MBRP: Offers a variety of exhaust options, including delete pipes for diesel trucks.
Conclusion
The 6.7 Powerstroke delete pipe can greatly improve performance, fuel economy, and noise for diesel enthusiasts, but the legal and environmental concerns are something to really take into consideration. Those who drive in compliant-friendly areas or who enjoy off-road trucking find DPF delete pipe to be true performance upgrades that unlock all that the 6.7 Powerstroke engine has to offer. Always check regional regulations before doing this sort of modification.
