Upgrading the turbo on your 7.3L Powerstroke is among the most effective ways to unlock more power and improve towing capability. But with so many options on the market, choosing the right one can be overwhelming. We researched and compared the top turbos based on manufacturer specifications, published industry standards, and aggregated owner feedback from forums and verified reviews. Our evaluation focuses on performance, durability, ease of installation, and real-world reliability to help you make an informed decision.
Below are our top picks, each with a detailed breakdown of strengths and limitations. Note that no turbo is perfect for every build; we highlight who should consider each option and who should look elsewhere.
| Photo | Product | Score | Buy |
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Garrett GT3788R Turbocharger Best Overall T4 flange, 88mm compressor wheel, ball bearing center section |
9.2 | 🛒 Check Price |
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KC Turbos Stage 1 63/68 Best Value Stock replacement, 63mm inducer/68mm exducer compressor, journal bearing |
8.7 | 🛒 Check Price |
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BorgWarner S300SX 62/68 Best for High Power T4 divided housing, 62mm inducer/68mm exducer, supercore technology |
9.0 | 🛒 Check Price |
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Mamba 66/73 Turbocharger Budget Pick T4 flange, 66mm inducer/73mm exducer, journal bearing |
7.8 | 🛒 Check Price |
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Precision Turbo 6266 Gen 2 Performance Upgrade T4 divided, 62mm inducer/66mm exducer, ball bearing |
8.4 | 🛒 Check Price |
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Holset HE351CW OEM+ Upgrade Stock replacement from Dodge Cummins, 55mm inducer/60mm exducer, journal bearing |
8.1 | 🛒 Check Price |
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S&B Filters Stage 1 Turbo Kit Complete Kit Complete bolt-on kit with turbo, intake, and intercooler piping |
7.3 | 🛒 Check Price |
1. Garrett GT3788R Turbocharger: Best Overall
In our evaluation, the Garrett GT3788R stands out as the most well-rounded turbo for 7.3 diesel owners seeking a significant power increase without sacrificing daily drivability. Based on manufacturer specs and owner feedback, the ball bearing center section dramatically reduces lag, making it ideal for towing and stop-and-go driving. The T4 flange and 88mm compressor wheel flow enough air for 450-550 hp when paired with injectors and tuning. We compared published airflow maps and found it maintains efficiency across a wide operating range.
However, this turbo is not for budget-conscious builds. The premium price reflects the advanced bearing technology and Garrett’s reputation. If you plan on staying near stock power levels (under 400 hp), a journal bearing turbo like the KC Turbos stage 1 may offer better value. Also, installation requires careful oil feed line setup to ensure proper lubrication. We recommend this for owners who want a proven, long-term upgrade and are willing to invest in quality.
- Ball bearing cartridge spools faster than journal bearing turbos
- Supports up to 550 hp with proper supporting mods
- Direct fit for stock 7.3 Powerstroke pedestal and up-pipes
Pros: Excellent spool and transient response; Proven reliability in high-mileage applications
Cons: Higher initial investment compared to journal bearing options
2. KC Turbos Stage 1 63/68: Best Value
Based on owner feedback and our comparison of specs, the KC Turbos Stage 1 is the best bang-for-buck upgrade for 7.3 diesel owners. It uses a journal bearing center housing but features a billet compressor wheel that flows significantly more air than the stock wheel. According to published data, it supports up to 450 hp with supporting mods, which covers most street and towing applications. We researched installation reports and found it fits without any grinding or welding, making it a popular choice for DIY enthusiasts.
The main limitation is that it runs out of steam above 450 hp. If you plan on building a 500+ hp truck, this turbo will become a restriction. Additionally, the journal bearing design means slightly slower spool than ball bearing units, but most owners report acceptable response. We recommend this for owners who want a reliable, affordable upgrade without going crazy on power. Skip it if you’re aiming for extreme performance or have a heavily modified engine.
- Direct bolt-on for stock 7.3 Powerstroke with no modifications
- Designed for mild to moderate power levels (350-450 hp)
- Includes billet compressor wheel for improved flow over stock
Pros: Excellent value for the performance gain; Simple installation using factory mounting points
Cons: Limited top-end flow for high-horsepower builds
3. BorgWarner S300SX 62/68: Best for High Power
For owners chasing serious horsepower, the BorgWarner S300SX 62/68 is a top contender. We researched its compressor map and compared it to other high-flow turbos; it delivers exceptional airflow for 500-700 hp without surge issues. The dual ball bearing core and supercore technology are proven in diesel motorsports, and owner feedback on forums like Powerstroke.org highlights its reliability under sustained high boost. The divided T4 housing helps with spool and efficiency, especially when paired with a good exhaust manifold.
Installation is not for beginners. This turbo requires aftermarket up-pipes, a different pedestal, and often a custom intake. The cost of supporting modifications adds up quickly. Also, the S300SX can be prone to compressor surge if the engine is not properly tuned or if the wastegate is not set correctly. We recommend this only for experienced builders with a clear power goal above 500 hp. For those with a mostly stock truck, this turbo will be overkill and may cause drivability issues.
- Superior flow capacity for 500-700 hp builds
- Dual ball bearing cartridge for quick spool and durability
- Divided T4 housing improves exhaust pulse separation
Pros: Handles high boost levels reliably; Excellent for racing or heavy towing in high-power setups
Cons: Requires aftermarket up-pipes and custom mounting
4. Mamba 66/73 Turbocharger: Budget Pick
The Mamba 66/73 is a budget-oriented turbo that we evaluated based on owner reports and spec comparisons. It offers a billet compressor wheel and T4 flange at a fraction of the cost of name brands. For owners on a tight budget who need a replacement or mild upgrade, it can provide a noticeable improvement over stock. The adjustable wastegate is a nice feature for fine-tuning boost. However, we found consistent feedback about inconsistent balancing and premature bearing wear. Some users reported failure within 10,000 miles.
Durability is the main concern. The journal bearing and lower-grade materials mean this turbo is not suitable for heavy towing or sustained high boost. We recommend it only for light-duty use or as a temporary fix. If you plan to keep your truck for many years or rely on it for work, spending more on a KC or Garrett unit is wise. Skip this if you need a long-term, reliable solution.
- Affordable option for mild upgrades (300-400 hp)
- Billet aluminum compressor wheel resists fatigue
- Includes adjustable wastegate actuator
Pros: Very low price point for a billet wheel turbo; Decent spool for a journal bearing unit
Cons: Reported quality control issues and shorter lifespan
5. Precision Turbo 6266 Gen 2: Performance Upgrade
The Precision Turbo 6266 Gen 2 is a performance-oriented turbo that we researched for its advanced wheel design. The extended tip technology allows it to flow more air than older models, and owner reviews on diesel forums praise its quick spool and strong mid-range. Based on published data, it supports 450-650 hp, making it all-around for street and strip. The dual ceramic ball bearing is durable and reduces lag. We compared it to the Garrett GT3788R and found similar response but slightly less top-end flow.
However, the price is steep for a turbo that doesn’t quite reach the top of the power charts. For the same money, you could get a BorgWarner S300SX that flows more. Additionally, installation may require adapter plates or custom oil lines depending on your setup. We recommend this for enthusiasts who want a balance of performance and drivability and are willing to pay a premium. Skip if you are on a strict budget or need maximum power.
- Gen 2 billet wheel with extended tip technology for higher flow
- Dual ceramic ball bearing for low friction and fast spool
- Compact design fits many aftermarket manifolds
Pros: Excellent mid-range power and response; Well-suited for daily driven performance trucks
Cons: Price is high for the power level achieved
6. Holset HE351CW: OEM+ Upgrade
The Holset HE351CW is a popular swap for 7.3 diesel owners because it’s a sturdy factory turbo from the 6.7L Cummins. We researched adapter kits and owner reports; many have successfully installed it with a simple bracket and oil line modifications. It flows enough for 350-400 hp and spools quickly, making it a great option for those wanting an OEM+ upgrade. The journal bearing is durable, and Holset turbos are known to last hundreds of thousands of miles in stock applications.
The downside is that installation is not straightforward. You’ll need an adapter plate, different exhaust housing (or machine the stock one), and custom intake piping. It’s not a direct bolt-on. Also, the small compressor wheel limits top-end power. If you plan on exceeding 400 hp, look elsewhere. We recommend this for budget-minded owners who enjoy fabricating and want a reliable, low-cost upgrade. Skip if you want a simple plug-and-play installation or high horsepower.
- Factory turbo from 6.7L Cummins, known for reliability
- Bolt-on with adapter kit for 7.3 Powerstroke
- Supports up to 400 hp with good spool
Pros: Proven durability in high-mileage applications; Inexpensive if sourced used
Cons: Requires adapter plates and may need exhaust housing mods
7. S&B Filters Stage 1 Turbo Kit: Complete Kit
The S&B Filters Stage 1 Turbo Kit is aimed at beginners who want a complete package. Based on our research, it includes a turbo (likely a rebranded unit), a cold air intake, and intercooler pipes. It’s designed for mild upgrades and simplifies the installation process. Owner feedback indicates it provides a modest power increase and is reliable for daily driving. The powder coating is a nice touch for longevity.
However, the turbo itself is not a high-performance unit. It uses a journal bearing and a smaller compressor wheel that limits power to around 400 hp. The kit is also priced higher than buying separate components, so you pay for convenience. We found that the intake and piping quality are adequate but not premium. We recommend this only for those who want a no-fuss, one-box solution and don’t plan to push power. Enthusiasts looking for serious performance should avoid this kit and piece together a better setup.
- Includes everything needed for installation
- Designed for 300-400 hp street use
- Powder-coated compressor housing for corrosion resistance
Pros: All-in-one solution reduces sourcing hassle; Lifetime air filter included
Cons: Turbo itself is a generic journal bearing unit with limited flow
Frequently Asked Questions
What is the best turbo for towing with a 7.3 Powerstroke?
For towing, we recommend a turbo with quick spool and good mid-range torque. The Garrett GT3788R or KC Turbos Stage 1 are excellent choices. Both provide strong response at low RPM, which is crucial for pulling heavy loads. Avoid large turbos like the BorgWarner S300SX if you primarily tow, as they may lag until higher RPM.
Can I install a 7.3 turbo myself?
Yes, many turbos are designed for DIY installation, especially those that are direct bolt-on like the KC Stage 1. However, you will need basic mechanical skills, tools, and a torque wrench. More complex swaps like the Holset HE351CW or BorgWarner require fabrication. Always follow the manufacturer’s instructions and consider a professional tune after installation.
Do I need to upgrade my injectors and tuning with a new turbo?
For significant power gains (over 400 hp), yes. A larger turbo forces more air, and without additional fuel and proper tuning, you may run lean and cause engine damage. For mild upgrades like the KC Stage 1, stock injectors and a simple tune are often sufficient. Always consult with a diesel tuner for your specific setup.
What is the difference between journal bearing and ball bearing turbos?
Ball bearing turbos (like Garrett GT3788R) use rolling elements for lower friction, resulting in faster spool and better transient response. They are more expensive but more durable under high boost. Journal bearing turbos (like KC Stage 1) use a fluid film and are cheaper, but they have slightly more lag and may wear faster under extreme use.
How do I know which turbo size is right for my 7.3?
Match the turbo to your power goals and driving style. For 300-400 hp, a 63/68 or 66/73 is ideal. For 400-550 hp, consider 66/73 or 62/68. Above 550 hp, go with 62/68 or larger. Also consider spool characteristics: larger turbos make more top-end power but lag more. Use compressor maps and consult with diesel performance shops.
Our Verdict
After researching and comparing the top turbos for the 7.3 Powerstroke, our top pick is the Garrett GT3788R for its exceptional balance of performance, durability, and drivability. For those on a budget, the KC Turbos Stage 1 offers the best value without sacrificing reliability. Choose based on your power goals and willingness to invest in supporting modifications.
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