True North Turbos 63.5mm VGT Turbo | 2004.5-2010 LLY LBZ LMM Duramax

600-650RWHP With Supporting Modifications

The True North Turbos 63.5mm VGT Turbo is engineered for 2004.5-2010 LLY, LBZ, and LMM Duramax owners who want improved towing performance, lower exhaust gas temperatures, increased airflow, and excellent street manners without sacrificing the factory variable geometry functionality that makes these trucks so enjoyable to drive.

Designed as a direct drop-in replacement for the factory turbocharger, this TNT turbo features a 63.5mm billet compressor wheel and delivers a significant airflow improvement over stock while maintaining fast spool-up, excellent drivability, and strong towing characteristics.

Unlike many competing VGT upgrades that utilize an 11mm vane system, the TNT turbo features a larger and more robust 15mm vane system. The increased vane size provides improved durability, greater vane control authority, and enhanced reliability under demanding towing and performance conditions.

Every True North Turbo is designed, machined, assembled, and balanced in Canada.

Why Choose A TNT 63.5mm VGT Turbo?

This turbo was developed for truck owners looking for the perfect balance between towing capability, daily drivability, and increased horsepower potential.

Whether you're hauling heavy trailers, towing RVs through mountain grades, daily driving your Duramax, or building a responsive street truck, this TNT VGT turbo offers improved airflow and EGT control while retaining the benefits of a factory-style VGT turbocharger.

Key Features

• 63.5mm billet compressor wheel
• Upgraded turbine assembly
• Heavy-duty 15mm vane system
• Direct drop-in installation
• Retains factory variable geometry functionality
• Improved airflow efficiency
• Lower EGTs under load
• Excellent towing performance
• Fast spool-up characteristics
• Strong low-end response
• Supports custom tuning and fueling upgrades
• Canadian designed, machined, assembled, and balanced

The TNT 15mm Vane System Advantage

One of the biggest differences between a TNT turbo and many competing Duramax VGT turbochargers is the vane system itself.

Many aftermarket Duramax VGT turbos continue to use smaller 11mm vane assemblies. TNT utilizes a substantially larger 15mm vane system engineered for increased durability and improved control under heavy-duty operating conditions.

Benefits of the TNT 15mm vane system include:

• Increased vane durability
• Improved reliability during towing
• Better control under high exhaust flow conditions
• Reduced wear compared to smaller vane assemblies
• Enhanced long-term performance

For customers who regularly tow, work their trucks hard, or demand maximum reliability from their turbocharger, the larger vane system is a significant advantage.

Ideal Applications

This TNT turbo is an excellent choice for:

• Daily driven Duramax trucks
• Heavy towing applications
• RV and trailer towing
• Hotshot trucks
• Street performance builds
• Stock fuel trucks
• Mild to moderate fueling upgrades
• Customers looking to lower EGTs while maintaining quick response

Benefits Over The Factory Turbo

Compared to the factory LLY, LBZ, and LMM turbocharger, this TNT upgrade offers:

• Increased airflow capacity
• Improved towing performance
• Better EGT control under sustained load
• Stronger top-end power
• Improved durability
• Retention of factory-style exhaust braking functionality
• Direct bolt-in installation
• Enhanced overall drivability

Recommended Supporting Modifications

For optimal performance and reliability, we recommend:

• Custom tuning
• Lift pump system
• High-flow intake
• Intercooler upgrades
• Transmission tuning
• EGT monitoring
• Free-flowing exhaust system

Frequently Asked Questions

Is this TNT turbo good for towing?

Yes. This turbo was specifically designed to provide improved airflow and lower EGTs while maintaining the fast spool-up and responsiveness required for towing applications.

Will this turbo lower EGTs?

Compared to the factory turbocharger, the improved airflow efficiency can help reduce exhaust gas temperatures under sustained load when properly tuned.

Does this turbo retain factory exhaust braking?

Yes. This TNT turbo retains factory-style variable geometry functionality, including exhaust braking characteristics.

Is this a direct drop-in turbo?

Yes. It is designed as a direct replacement for compatible 2004.5-2010 LLY, LBZ, and LMM Duramax applications.

Does this turbo require tuning?

Custom tuning is strongly recommended to maximize performance, drivability, boost control, and overall reliability.

What makes TNT different from other Duramax VGT upgrades?

TNT utilizes a heavy-duty 15mm vane system rather than the smaller 11mm vane assemblies commonly found in competing designs, providing increased durability and improved control under demanding towing and performance conditions.