Upgrading the turbo on a 5.9 Cummins is one of the most effective ways to increase horsepower and torque. But with so many options, choosing the right drop in turbo can be overwhelming. We researched manufacturer specifications, compared published performance data, and evaluated aggregated owner feedback to bring you this guide. Our goal is to help you find a turbo that balances power gains, spool characteristics, and durability without requiring major modifications.
| Photo | Product | Score | Buy |
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Fleece Performance Cheetah 62mm Best Overall Drop In 62mm inducer, billet wheel, 5.9 Cummins direct fit |
9.0 | 🛒 Check Price |
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BorgWarner S300 SXE 62mm Best Value Performance 62mm inducer, SXE compressor wheel, direct fit with adapter |
8.7 | 🛒 Check Price |
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Industrial Injection Silver 62mm Best for Towing 62mm billet wheel, direct fit, 5.9 Cummins |
8.4 | 🛒 Check Price |
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BD Diesel Super B Special 62mm Best for Daily Driving 62mm inducer, drop in, 5.9 Cummins |
8.1 | 🛒 Check Price |
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Garrett GT3788VA 62mm Best for Stock Replacements 62mm variable vane, 5.9 Cummins, OEM replacement |
7.8 | 🛒 Check Price |
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ATS Aurora 3000 62mm Best for High Horsepower 62mm billet wheel, 5.9 Cummins, high flow |
7.3 | 🛒 Check Price |
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Engineered Diesel Stealth 64mm Best for Power on a Budget 64mm inducer, drop in, 5.9 Cummins |
7.6 | 🛒 Check Price |
1. Fleece Performance Cheetah 62mm: Best Overall Drop In
The Fleece Performance Cheetah 62mm is widely regarded as one of the best drop in turbos for the 5.9 Cummins. In our evaluation, it consistently delivers strong performance gains with minimal lag. The billet wheel design improves airflow over cast wheels, and owner feedback highlights excellent throttle response and towing capability. It is a direct fit for stock manifolds and requires no modifications, making it a true drop in upgrade.
However, this turbo comes at a higher price point than some alternatives. It also may not be ideal for those seeking extreme horsepower above 700, as it is optimized for daily driving and moderate performance. If you are on a tight budget or aiming for maximum power, you might consider other options. But for a balanced, reliable upgrade, the Cheetah 62mm is a top contender.
- Direct bolt on for 5.9 Cummins with no modifications needed
- Billet compressor wheel for improved airflow and quicker spool
- Supports up to 650 horsepower with proper supporting mods
Pros: Excellent spool and low end torque; High quality construction and fitment
Cons: Premium pricing compared to some competitors
2. BorgWarner S300 SXE 62mm: Best Value Performance
The BorgWarner S300 SXE 62mm is a popular choice among budget conscious owners who still want solid performance. We compared its specs to the Fleece Cheetah and found that while it offers similar airflow potential, it often requires an adapter or minor modifications to bolt directly to the 5.9 Cummins manifold. Owner feedback praises its durability and ability to handle moderate tuning, making it a great value for the money.
On the downside, the S300 SXE can have slightly more lag than billet wheel turbos, and fitment can be a hassle for some. It is not a true drop in for all trucks without additional parts. If you are comfortable with a small amount of fabrication or buying an adapter, this turbo offers excellent bang for the buck. However, if you want a hassle free install, consider a dedicated drop in option.
- Proven SXE wheel design for efficient airflow
- Often requires adapter or slight modification for 5.9 Cummins
- Supports up to 600 horsepower with good spool
Pros: Strong performance at a competitive price; Wide availability and aftermarket support
Cons: May need adapter plate for direct fit; Not as refined as premium options
3. Industrial Injection Silver 62mm: Best for Towing
Industrial Injection’s Silver 62mm turbo is engineered specifically for towing and daily driving. In our evaluation, it shines with its quick spool and strong mid range torque, making it ideal for pulling heavy loads. The billet wheel and heavy duty bearings contribute to its reputation for reliability, and owner feedback often highlights its ability to maintain cool EGTs under load. It is a direct fit for the 5.9 Cummins, simplifying installation.
However, this turbo is not designed for maximum horsepower. If you are chasing high numbers or drag racing, you may find it lacking above 600 horsepower. It also commands a premium price, which may not appeal to those on a tight budget. For owners who prioritize towing performance and durability over peak power, the Silver 62mm is a strong choice.
- Billet wheel for quick spool and towing torque
- Direct bolt on, no modifications required
- Built with heavy duty bearings for longevity
Pros: Excellent low end torque for towing; Robust construction and reliability
Cons: Higher price point; Limited top end power compared to larger turbos
4. BD Diesel Super B Special 62mm: Best for Daily Driving
The BD Diesel Super B Special 62mm is a straightforward upgrade for those wanting a bit more performance without complications. We researched its specifications and found it offers a modest increase in airflow over the stock turbo, making it suitable for mild tuning. Owner feedback indicates it is a reliable workhorse for daily driving and light towing, with easy installation that requires no special tools.
However, this turbo is not ideal for high performance builds. Its cast wheel design cannot match the flow of billet wheel turbos, and it may struggle above 500 horsepower. If you plan to push your truck hard or run aggressive tunes, you will likely outgrow this turbo quickly. For a simple, reliable upgrade that maintains drivability, the Super B Special is a solid option.
- Direct drop in replacement for stock turbo
- Improved airflow over factory unit
- Good for mild performance upgrades
Pros: Simple installation, no modifications; Reliable performance for daily use
Cons: Not as aggressive as billet wheel turbos; Limited top end power
5. Garrett GT3788VA 62mm: Best for Stock Replacements
The Garrett GT3788VA is a variable geometry turbo that serves as a direct OEM replacement for the 5.9 Cummins. In our comparison, it stands out for its smooth power delivery and excellent response, especially at low RPM. Owner feedback often mentions improved drivability over the stock turbo, and it is a popular choice for those who want a reliable upgrade without changing the driving character.
However, the variable vane mechanism adds complexity and potential failure points. It is also not designed for high horsepower applications, as the vanes can be a limiting factor. If you are planning significant performance upgrades, you will likely need a different turbo. For a simple, reliable replacement that offers a slight performance boost, the GT3788VA is a good choice.
- Variable geometry for improved response
- Direct OEM replacement fit
- Good for stock or lightly modified trucks
Pros: Smooth power delivery; OEM quality and reliability
Cons: Complex design can lead to higher repair costs; Not for high horsepower builds
6. ATS Aurora 3000 62mm: Best for High Horsepower
The ATS Aurora 3000 62mm is built for those chasing big power numbers. We evaluated its specifications and found it capable of supporting over 700 horsepower with the right supporting mods. The billet wheel and large compressor housing flow significant air, making it a favorite among performance enthusiasts. Owner feedback often highlights its ability to deliver impressive top end power.
However, this turbo is not for the faint of heart. It often requires modifications to fit, such as different exhaust manifolds or oil lines, and it can have noticeable lag. It is also less suited for daily driving or towing due to its narrow power band. If you are building a dedicated race truck or a high horsepower street truck, the Aurora 3000 is a strong contender. But for most owners, it will be too much turbo.
- Designed for high horsepower applications
- Billet wheel for maximum airflow
- Requires supporting modifications
Pros: Excellent top end power potential; High quality billet construction
Cons: Not a true drop in, may need modifications; Higher lag and less daily drivability
7. Engineered Diesel Stealth 64mm: Best for Power on a Budget
The Engineered Diesel Stealth 64mm is a budget friendly option that offers a larger compressor wheel than most drop in turbos. We researched its performance and found it can provide significant power gains, especially at higher RPM. Owner feedback indicates it is a popular choice for those who want maximum airflow without spending a fortune. It is designed to be a direct fit, though some users report minor fitment issues.
However, the 64mm wheel can introduce more turbo lag compared to 62mm options, and there are some reports of durability issues with the cheaper components. It is not recommended for heavy towing or sustained high load use. If you are on a tight budget and want a noticeable power increase for occasional performance use, the Stealth 64mm is worth considering. But for a reliable daily driver, you may want to invest in a higher quality turbo.
- Larger 64mm wheel for increased airflow
- Affordable price point
- Direct fit for 5.9 Cummins
Pros: Good power gains for the price; Larger wheel offers more top end
Cons: May have more lag than 62mm options; Durability concerns with some units
Frequently Asked Questions
What is a drop in turbo for a 5.9 Cummins?
A drop in turbo is a direct replacement for the factory turbocharger that requires no modifications to the exhaust manifold, downpipe, or oil lines. It is designed to bolt on using existing hardware, making installation straightforward for DIY owners. Most drop in turbos for the 5.9 Cummins maintain the same mounting flange and orientation as the stock unit.
Will a drop in turbo increase horsepower?
Yes, a drop in turbo can increase horsepower by flowing more air than the stock unit. The gain depends on the turbo size and your truck’s tuning. Typically, a 62mm drop in turbo can add 50-100 horsepower with appropriate fuel and timing adjustments. However, for significant gains, you may need supporting modifications like injectors and a lift pump.
Do I need to tune my truck after installing a drop in turbo?
It is highly recommended to tune your truck after installing a drop in turbo to optimize performance and avoid excessive EGTs. The stock ECU may not deliver enough fuel to match the increased airflow, leading to lean conditions. A custom tune will ensure proper air-fuel ratios and maximize power safely.
What is the difference between a 62mm and 64mm drop in turbo?
The difference is the inducer diameter of the compressor wheel. A 64mm turbo flows more air at high RPM, which can support higher horsepower, but it often has more lag and may not spool as quickly as a 62mm. For daily driving and towing, a 62mm is generally preferred for its quicker response. For drag racing or high performance, a 64mm can offer more top end power.
Can I use a drop in turbo for towing?
Yes, many drop in turbos are excellent for towing, especially those with quick spool characteristics like the Industrial Injection Silver 62mm. A properly sized turbo can lower EGTs and improve torque while towing. However, larger turbos may increase lag and make towing less pleasant. It is important to choose a turbo that matches your typical load and driving style.
Our Verdict
After researching specifications and owner feedback, our top pick is the Fleece Performance Cheetah 62mm for its exceptional balance of performance, spool, and direct fitment. The BorgWarner S300 SXE 62mm is a strong runner up, offering great value for those willing to handle minor fitment adjustments. For towing, the Industrial Injection Silver 62mm is the best choice, while the BD Diesel Super B Special is ideal for simple daily driving upgrades.
