Turbo Spec Form
2017-2023 6.6L L5P / L5D Duramax 64/67 760-880HP Drop-In Turbo
760-880HP with supporting mods!
The Black Sheep Industries 64/67 Drop-In Turbo for the 2017-2023 6.6L L5P and L5D Duramax platform is engineered for truck owners who want improved towing performance, lower EGTs, stronger airflow, and excellent street drivability without sacrificing fast spool-up characteristics.
Designed as a direct drop-in replacement for the factory turbocharger, this 64/67 turbo is an ideal choice for daily driven trucks, tow rigs, street performance builds, and customers looking for a more efficient turbocharger setup while retaining factory-style fitment.
If you are comparing L5P turbo options, visit our L5P / L5D Duramax Turbocharger Collection or compare this turbo against the 67/67 L5P Duramax Drop-In Turbo .
Why Choose the 64/67 L5P Duramax Turbo?
The 64/67 configuration is built for balance. It provides improved airflow over the factory turbocharger while maintaining the quick response and drivability that L5P owners expect from a street-friendly VGT setup.
- 64mm compressor wheel
- 67mm turbine wheel
- Direct drop-in fitment
- Improved airflow efficiency
- Lower exhaust gas temperatures under load
- Excellent towing performance
- Fast spool-up characteristics
- Strong daily driving manners
- Supports additional fueling and custom tuning
- Great option for tow rigs and street-driven trucks
64/67 vs Factory L5P Turbo
| Feature | Factory L5P Turbo | BSI 64/67 Drop-In Turbo |
|---|---|---|
| Airflow Capability | Factory-Level | Improved |
| Towing Performance | Good | Excellent |
| EGT Control | Can Become Limited Under Heavy Load | Improved Under Load |
| Spool-Up | Excellent | Excellent |
| Performance Potential | Limited | Moderate to High |
| Best Use | Stock Trucks | Tuned Trucks, Tow Rigs, Street Builds |
64/67 vs 67/67 L5P Duramax Turbo
| Feature | 64/67 Drop-In Turbo | 67/67 Drop-In Turbo |
|---|---|---|
| Spool-Up | Excellent | Very Good |
| Towing Performance | Excellent | Very Good |
| Low-End Response | Excellent | Very Good |
| Top-End Airflow | Very Good | Excellent |
| Horsepower Potential | Moderate to High | High |
| Best Application | Daily Driving and Towing | Street Performance and Higher Horsepower Builds |
Best Applications
- Daily driven L5P Duramax trucks
- Heavy towing applications
- RV and trailer towing
- Street performance builds
- Mild to moderate tuning setups
- Customers wanting lower EGTs without sacrificing spool-up
Recommended Supporting Modifications
For best results, this turbocharger should be paired with proper supporting modifications and professional tuning.
- Custom tuning
- Lift pump system
- High-flow intake system
- Intercooler pipe upgrades
- Transmission tuning
- EGT monitoring
- Free-flowing exhaust system where applicable
Helpful L5P Duramax Turbo Resources
- Best L5P Duramax Turbo Upgrades for Towing
- 67/67 vs 64/67 L5P Duramax Turbo
- How to Lower EGTs on an L5P Duramax
Frequently Asked Questions
Is the 64/67 L5P turbo good for towing?
Yes. The 64/67 is built specifically for towing-focused L5P Duramax owners, balancing fast spool-up with improved airflow and EGT control under load.
Will this turbo lower EGTs on my L5P Duramax?
A properly matched upgraded turbocharger can help reduce exhaust gas temperatures by improving airflow efficiency and reducing restriction under load.
Is the 64/67 or 67/67 the better choice?
The 64/67 favours spool-up, low-end response, and towing manners, while the 67/67 favours top-end airflow and higher horsepower potential. Daily-driven tow rigs typically do best with the 64/67; aggressive street builds typically do best with the 67/67.
Does this turbo require tuning?
Custom tuning is strongly recommended to maximize performance, drivability, boost control, and long-term reliability.
Is this a direct drop-in turbo?
Yes. This turbocharger is designed as a direct drop-in upgrade for compatible 2017-2023 6.6L L5P and L5D Duramax applications.
Power ratings on this page are quoted in crank horsepower (HP). Figures previously published in wheel horsepower (WHP) have been restated using our in-house tested conversion — the hardware and its capability are unchanged.