The B58 engine is a turbocharged inline-six-cylinder engine produced by BMW. It is a part of the BMW modular engine family, which also includes the three-cylinder B38, four-cylinder B48, and eight-cylinder N63 engines. The B58 engine was introduced in 2015 and replaced the N55 engine in BMW's lineup. It is used in several BMW models, including the 340i, 540i, 740i, X3 M40i, X4 M40i, and Z4 M40i.

The B58 engine features direct injection, variable valve timing, and a twin-scroll turbocharger. It produces up to 382 horsepower and 500Nm of torque in the M40i versions. The B58 engine is known for its smooth power delivery, high power output, and relatively low fuel consumption.

Overall, the B58 engine is a powerful and advanced engine that has received positive reviews from automotive experts and enthusiasts.

The strongest B58 engine in terms of horsepower and torque output is found in the BMW X3 M40i, X4 M40i, and the Z4 M40i. This version of the B58 engine produces up to 382 metric horsepower (375 horsepower in US measurements) and 500 Nm (369 lb-ft) of torque.

It's worth noting that the power output can vary depending on the specific model and year of the car, as well as any modifications that have been made. Additionally, the power output can be affected by external factors such as altitude, temperature, and humidity.

The BMW B58 engine is a modular inline 6-cylinder engine that is currently used in several BMW models. Some of the cars that are equipped with the B58 engine include;

1. BMW 340i (2016-2019)
2. BMW 440i (2016-2019)
3. BMW 540i (2017-2020)
4. BMW 545e
5. BMW 640i (2018-2019)
6. BMW 740i (2016-2019)
7. BMW 745e
8. BMW M240i (2017-2019)
9. BMW M340i (2019-2021)
10. BMW M440i (2020-2021)
11. BMW X3 M40i (2018-2021)
12. BMW X4 M40i (2018-2021)
13. BMW X5 xDrive40i (2019-2021)
14. BMW X5 xDrive45e
15. BMW X6 xDrive40i (2019-2021)
16. Toyota GR Supra (2020-)

Tuning the B58 engine can be done in several ways, and it's important to work with a reputable tuner or tuning company to ensure the best results. Here are some steps you can take to tune your B58 engine:

1. Find a reputable tuner: Look for a professional tuner or tuning company with experience in tuning BMW engines, especially the B58 engine. They should have a good reputation and offer warranties on their work. PSR Parts is able to help you source the right software suppliers to properly unlock the performance for the B58 Engine.
2. Choose your tuning method: There are several methods of tuning the B58 engine, including piggyback tuning, flash tuning, and custom tuning. Each method has its own benefits and drawbacks, so it's important to choose the method that best suits your needs and goals.
3. Install supporting modifications: To get the most out of your tune, you may need to install supporting modifications such as a cold air intake, upgraded intercooler, or upgraded exhaust system. These modifications will help the engine breathe better and make more power.
4. Dyno or Road-Log testing: Dyno testing or Logging is a vital step in the tuning process. A dyno is a tool that measures horsepower and torque output, and it's used to optimize the tune for your specific engine by reading the engine's log. During dyno testing, the tuner will make adjustments to the tune based on the dyno results.
5. Road testing: After the dyno testing is complete, the car should be road-tested to ensure that the tune is safe and effective in real-world driving conditions. The tuner may make further adjustments based on the road test results.

There are several modifications you can install on your B58 engine to improve its performance:

1. Cold Air Intake: A cold air intake system can improve airflow to the engine, which can increase horsepower and torque. It also improves the engine sound.
2. Downpipe: A high-flow downpipe can increase the exhaust flow, which can improve turbo spool-up and overall performance. It also increases the exhaust sound.
3. Intercooler Upgrade: An upgraded intercooler can reduce intake air temperatures, which can increase the engine's power output. It can also improve the engine's response.
4. Tune: A performance tune can optimize the engine management software to allow for more boost, advanced timing, and improved fuel delivery. It is the most effective way to increase power on a turbocharged engine.
5. Upgraded Exhaust System: An upgraded exhaust system can improve the flow of exhaust gases, which can increase horsepower and torque. It also improves the exhaust sound.
6. Turbocharger Upgrade: Upgraded turbochargers can increase boost pressure, which can increase horsepower and torque. However, turbocharger upgrades can be expensive and require additional supporting modifications.

A cold air intake is a popular modification for the BMW B58 engine as it can improve airflow to the engine, which can increase horsepower and torque. Here are some things to consider when looking for a cold air intake for your B58 engine:

1. Quality: Look for a high-quality cold air intake that is specifically designed for the B58 engine. The cold air intake should be made from quality materials, and it should be well-designed to ensure that it provides a good seal and allows for optimal airflow.

2. Compatibility: Make sure that the cold air intake is compatible with your specific model and year of BMW with the B58 engine. Some cold air intakes may only be designed to work with certain models or may require additional modifications to fit properly.

3. Performance: Look for a cold air intake that has been tested to provide actual gains in performance, such as increased horsepower and torque. Be wary of claims that seem too good to be true.

4. Installation: Consider the ease of installation when choosing a cold air intake. Look for one that is designed to be a direct replacement for the factory air intake, as this can make installation easier and ensure a proper fit.

5. Maintenance: Consider the maintenance required for the cold air intake. Some models may require regular cleaning or oiling of the air filter, while others may have a reusable or washable filter.

A high-quality cold air intake can be a great addition to a B58 engine, providing improved performance and a more aggressive engine sound. Be sure to choose a reputable brand and have the cold air intake installed properly to ensure the best results.

Choosing a downpipe for the BMW B58 engine can provide several benefits:

1. Improved Exhaust Flow: A downpipe can improve exhaust flow by increasing the diameter and reducing restrictions in the exhaust system. This can help the engine breathe better, allowing for improved horsepower and torque.

2. Increased Power: By improving exhaust flow, a downpipe can increase power output in the B58 engine. This can lead to a more responsive and exciting driving experience.

3. Aggressive Exhaust Note: A downpipe can also change the exhaust note of the B58 engine, making it louder and more aggressive. This can provide a sportier sound and enhance the driving experience.

4. Supporting Modifications: A downpipe can also be a supporting modification to other performance upgrades such as a turbo upgrade, intercooler upgrade, and ECU tune.

A downpipe is a popular and effective modification for the B58 engine. It can provide improved performance and a more aggressive exhaust note, making it a worthwhile investment for enthusiasts looking to get the most out of their BMW B58 engine.

Upgrading the radiator on your BMW B58 engine can provide several benefits:

1. Improved Cooling Efficiency: The radiator is responsible for dissipating heat from the engine coolant. By upgrading the radiator, you can improve cooling efficiency, which can help reduce engine temperatures and increase engine performance.

2. Increased Power Output: With lower engine temperatures, the B58 engine can produce more power, as it can operate at a more efficient level. This can lead to improved acceleration, throttle response, and overall performance.

3. Consistent Power Output: A more efficient radiator can also help maintain consistent power output during extended driving periods or in high-temperature conditions. This can help reduce the risk of overheating, which can cause a decrease in performance.

4. Supporting Modifications: An upgraded radiator is a supporting modification that can work well with other performance upgrades such as a downpipe, exhaust, and ECU tune.

5. Increased Reliability: Upgrading the radiator can also help increase the reliability of the engine, as it can help prevent overheating and potential damage to the engine components.

Overall, upgrading the radiator on your BMW B58 engine is a great way to improve performance, reliability, and ensure consistent power output. It is a recommended modification for those looking to take their B58 engine to the next level of performance.

The BMW B58 engine is a popular choice for tuning because it has several features that make it a great platform for performance modifications:

1. Turbocharged: The B58 engine is turbocharged, which means it already has a forced induction system. This makes it easier to increase horsepower and torque by increasing the boost pressure or upgrading the turbocharger.

2. Direct Injection: The B58 engine has direct fuel injection, which provides precise control over the fuel delivery to the engine. This allows for more accurate tuning of the air/fuel ratio, which can improve performance and efficiency.

3. Strong Internals: The B58 engine has strong internals, including forged connecting rods and a closed deck block. This allows for higher power output without compromising the engine's reliability.

4. Electronic Control: The B58 engine has an advanced electronic control system, which allows for precise tuning and control over the engine's performance. This can be done through an ECU tune or standalone engine management system.

5. Compatibility with Supporting Modifications: The B58 engine is compatible with a wide range of supporting modifications, such as upgraded intercoolers, exhaust systems, and suspension components. This allows for a more comprehensive approach to tuning and improving performance.

The BMW B58 engine is a great platform for tuning due to its forced induction system, direct injection, strong internals, advanced electronic control, and compatibility with supporting modifications. It is a popular choice for enthusiasts looking to improve performance and take their driving experience to the next level.