Best Cummins Engine for Towing: 12 Valve vs 24 Valve vs 5.9 vs 6.7

If you're searching for the best Cummins engine for towing, you're not alone. Cummins engines are known for durability and torque, but each platform has strengths depending on your towing needs.

This guide compares the 12 valve, 24 valve, 5.9, and 6.7 Cummins engines to help you decide which engine is best for hauling heavy loads, trailers, and work applications.

If you're ready to upgrade or replace your engine, browse our full selection of 6.7 Cummins long block engines, 5.9 Cummins long blocks, 24 valve Cummins engines, and 12 valve Cummins long blocks.

What Makes a Cummins Engine Good for Towing?

The best towing engine depends on torque output, reliability, fuel delivery, and how well the engine handles sustained load. Diesel engines like Cummins are ideal for towing due to their high torque and durability.

12 Valve Cummins (1989-1998)

The 12 valve Cummins is known for its mechanical simplicity and reliability. It performs well for moderate towing but lacks the modern power and refinement of newer engines.

• Simple mechanical fuel system
• Highly reliable
• Best for lighter towing and older trucks

24 Valve Cummins (1998.5-2002)

The 24 valve Cummins introduced electronic fuel control with the VP44 injection pump. It offers improved performance over the 12 valve but still has limitations compared to newer engines.

• Better power than 12 valve
• VP44 fuel system
• Good for moderate towing

5.9 Cummins Common Rail (2003-2007)

The 5.9 Cummins common rail is one of the best all-around diesel engines. It combines strong towing capability with reliability and fewer emissions restrictions than newer platforms.

• Excellent reliability
• Strong towing performance
• Great balance of power and simplicity

6.7 Cummins (2007.5-2018)

The 6.7 Cummins offers the highest torque output and is the best option for heavy towing. It is designed for modern towing demands and performs best under load.

• Highest torque output
• Best for heavy towing
• Modern diesel platform

Best Cummins Engine for Towing: Final Comparison

Final Thoughts: Which Cummins Engine Is Best for Towing?

The best Cummins engine for towing depends on your needs. For maximum towing power, the 6.7 Cummins is the top choice. For a balance of reliability and performance, the 5.9 Cummins is one of the best all-around options.

CPP Diesel offers a full selection of Cummins engines for sale, including long block engines built for towing, performance, and reliability.