BMW 335i Performance Upgrades

BMW 335i Performance Upgrades: Your Ultimate Tune Guide

The BMW 335i is a high-performance car that has captured the hearts of car enthusiasts worldwide. With its powerful engine and sleek design, it’s no wonder that many people are looking for ways to upgrade their 335i to enhance its performance even further. In this article, we will explore the different performance upgrades available for the BMW 335i and provide a comprehensive guide to help you choose the right upgrades for your car.

Understanding the BMW 335i is crucial before diving into performance upgrades. The 335i is powered by a turbocharged inline-six engine that produces 300 horsepower and 300 lb-ft of torque. While this is already impressive, there are several ways to increase the car’s power output and improve its performance.

In this guide, we will cover the benefits of performance upgrades, the installation process, maintenance and care of upgraded components, safety considerations, and cost and value for money. By the end of this article, you’ll have a better understanding of how to upgrade your BMW 335i and take its performance to the next level.

Exploring the BMW 335i

The BMW 335i is a popular choice among car enthusiasts and for good reason. It boasts a powerful engine, sleek design, and impressive performance. To fully appreciate the potential of this car, it is important to understand its specifications and capabilities.

Engine Specifications

The BMW 335i is equipped with an inline straight-six engine with a Twin Turbocharged Direct Injection setup. The engine displacement on these models is 2979cm3. It produces 306 horsepower, which makes it a quick vehicle, especially in its class.

Performance Figures

The BMW 335i can go from 0-60 mph in just 5.3 seconds with a top speed of 155 mph. It also has a great torque curve, with peak torque of 300 lb-ft available from 1,400 to 5,000 RPM. This makes it a versatile car that can deliver power at any speed.

Tuning Potential

The BMW 335i has a lot of potential for tuning and upgrades. The twin-turbocharged engine is known for its ability to produce more power with simple modifications. Some popular upgrades include:

  • ECU tuning
  • Cold air intake
  • Exhaust system upgrade
  • Intercooler upgrade
  • Turbocharger upgrade

These upgrades can significantly increase the power output of the BMW 335i, making it even more fun to drive.

Handling and Suspension

The BMW 335i comes with a sport-tuned suspension that provides excellent handling and stability. It also has a rear-wheel-drive system that makes it a joy to drive on winding roads. However, some drivers may find the ride to be a bit harsh, especially on rough roads.

Benefits of Performance Upgrades

Upgrading the performance of a BMW 335i can bring a variety of benefits to the driver. These benefits can range from increased horsepower and torque to improved handling and fuel efficiency. Here are some of the main benefits of performance upgrades for the BMW 335i:

1. Increased Horsepower and Torque

One of the most significant benefits of performance upgrades is the increase in horsepower and torque. By upgrading the engine components such as the turbocharger, exhaust system, and intake system, the engine can produce more power and torque. This increase in power can result in faster acceleration and higher top speeds.

2. Improved Handling

Performance upgrades can also improve the handling of the BMW 335i. Upgrading the suspension system, brakes, and tires can result in better grip and control on the road. This can lead to more confidence when driving at high speeds and improved safety.

3. Better Fuel Efficiency

While it may seem counterintuitive, some performance upgrades can actually improve the fuel efficiency of the BMW 335i. By upgrading the engine components and optimizing the air/fuel ratio, the engine can operate more efficiently. This can result in better gas mileage and reduced emissions.

4. Enhanced Driving Experience

Perhaps the most significant benefit of performance upgrades is the overall enhancement of the driving experience. With increased power, improved handling, and better fuel efficiency, the BMW 335i can become a more enjoyable and thrilling car to drive. The driver can feel more connected to the road and have more control over the vehicle.

Choosing the Right Performance Upgrades

When it comes to upgrading the performance of your BMW 335i, there are several options available. Choosing the right upgrades can be a daunting task, but with a little research and careful consideration, you can make an informed decision that will give you the results you want.

1. Engine Tuning

Upgrading the engine is the most popular way to increase the power and performance of your BMW 335i. There are several engine tuning options available, including ECU (Engine Control Unit) tuning, piggyback systems, and standalone engine management systems. ECU tuning is the most common and cost-effective option, and it can improve throttle response, increase horsepower and torque, and improve fuel efficiency.

2. Exhaust System Upgrades

Upgrading the exhaust system can improve the sound and performance of your BMW 335i. A performance exhaust system can increase horsepower and torque, improve throttle response, and reduce backpressure. There are several types of exhaust systems available, including cat-back, axle-back, and header-back systems. Each type of system offers different benefits, so it’s important to choose the one that best suits your needs.

3. Suspension System Upgrades

Upgrading the suspension system can improve the handling and performance of your BMW 335i. There are several suspension upgrades available, including coilovers, sway bars, and strut braces. Coilovers are the most popular option, as they offer adjustable ride height and damping, which allows you to fine-tune your suspension for optimal performance.

4. Brake System Upgrades

Upgrading the brake system can improve the stopping power and performance of your BMW 335i. There are several brake upgrades available, including brake pads, brake rotors, and brake calipers. High-performance brake pads can provide better stopping power and reduce brake fade, while larger brake rotors and calipers can improve heat dissipation and reduce brake fade even further.

5. Aerodynamic Upgrades

Upgrading the aerodynamics of your BMW 335i can improve its performance and appearance. There are several aerodynamic upgrades available, including front splitters, rear diffusers, and wing spoilers. These upgrades can improve downforce, reduce drag, and enhance the overall appearance of your BMW 335i.

Installation Process

Installing a performance tuner on a BMW 335i can be a daunting task for those who are not familiar with the process. However, with the right tools and guidance, it can be done relatively easily. Here is a brief overview of the installation process for a BMS Stage 1 Performance Tuner:

  1. First, disconnect the negative terminal of the battery to prevent any electrical damage during the installation process.
  2. Locate the ECU (Engine Control Unit) in the engine bay. It is usually located on the passenger side of the engine bay, near the firewall.
  3. Remove the ECU cover and carefully disconnect the ECU harness connectors.
  4. Connect the BMS Stage 1 Performance Tuner to the ECU harness connectors and secure it in place.
  5. Reconnect the ECU harness connectors and replace the ECU cover.
  6. Reconnect the negative terminal of the battery.

It is important to note that installation instructions may vary depending on the specific tuner being used. It is recommended to follow the manufacturer’s instructions carefully to ensure proper installation and avoid any potential damage to the vehicle.

Maintenance and Care of Upgraded Components

After upgrading the performance of a BMW 335i, it is important to maintain and care for the upgraded components to ensure optimal performance and longevity. Here are some tips to keep in mind:

  • Regular maintenance is key: Upgraded components such as the high-pressure fuel pump and turbochargers require regular maintenance to ensure they are functioning properly. It is important to follow the manufacturer’s recommended maintenance schedule and to replace any worn or damaged parts as soon as possible.
  • Use high-quality fluids: Upgraded components can put additional stress on the engine and other parts of the vehicle. Using high-quality fluids such as synthetic oil and high-performance coolant can help reduce wear and tear and keep the engine running smoothly.
  • Monitor performance: It is important to monitor the performance of the upgraded components regularly. This can be done using a performance monitoring system or by paying attention to any changes in the vehicle’s performance or sound. Any issues should be addressed as soon as possible to prevent further damage.
  • Avoid harsh driving conditions: Harsh driving conditions such as racing or aggressive driving can put additional stress on the upgraded components and increase the risk of damage. It is important to avoid these conditions and to drive the vehicle in a safe and responsible manner.
  • Seek professional help: Upgraded components can be complex and require specialized knowledge to maintain and repair. It is important to seek the help of a professional mechanic with experience working on high-performance vehicles to ensure that the components are properly maintained and cared for.

Safety Considerations

When upgrading the performance of a BMW 335i, it is important to consider the safety implications of the modifications. While performance upgrades can enhance the driving experience, they can also increase the risk of accidents if not installed and used properly. Here are some safety considerations to keep in mind when upgrading a BMW 335i:

1. Quality of Parts

It is important to use high-quality parts that are designed specifically for the BMW 335i. Cheap or poorly designed parts can cause serious issues such as engine failure, brake failure, or suspension failure. Always purchase parts from reputable manufacturers and avoid products that seem too good to be true.

2. Proper Installation

Performance parts should be installed by a professional mechanic who has experience working on BMW 335i vehicles. Improper installation can cause serious issues such as engine damage, brake failure, or steering failure. Always follow the manufacturer’s instructions and seek professional help if you are unsure about the installation process.

3. Maintenance

Performance parts require proper maintenance to ensure they continue to function properly. Neglecting maintenance can cause serious issues such as engine failure, brake failure, or suspension failure. Always follow the manufacturer’s recommended maintenance schedule and seek professional help if you are unsure about the maintenance process.

4. Driving Habits

Upgrading the performance of a BMW 335i can lead to a more powerful and responsive driving experience. However, it is important to remember that with great power comes great responsibility. Drivers should be aware of their surroundings and avoid reckless driving habits that can lead to accidents. Always drive within the limits of the law and your own driving ability.

Cost and Value for Money

When considering performance upgrades for their BMW 335i, cost and value for money are important factors for car enthusiasts to consider. Fortunately, there are many options available at various price points that can provide significant gains in horsepower and torque.

One of the most popular and cost-effective upgrades is a tune. A tune involves reprogramming the car’s engine control unit (ECU) to optimize performance. There are many reputable companies that offer tunes for the BMW 335i, such as Cobb Tuning, Burger Motorsports, and Dinan. Prices for a tune can range from a few hundred to over a thousand dollars, depending on the level of customization and features.

Another popular upgrade is a cold air intake (CAI). A CAI can improve airflow to the engine, resulting in increased horsepower and torque. Prices for a CAI can range from a few hundred to over a thousand dollars, depending on the brand and materials used.

Upgrading the exhaust system is another option for improving performance. A high-performance exhaust system can increase horsepower and improve the car’s sound. Prices for an exhaust system can range from a few hundred to several thousand dollars, depending on the brand and materials used.

When considering the cost of upgrades, it’s important to also consider the value for money. Some upgrades may provide more significant gains in performance than others, and it’s important to weigh the cost against the potential benefits. It’s also important to consider the quality and reliability of the parts being used, as cheaper options may not provide the same level of performance or longevity.


The BMW 335i is a fantastic platform for performance upgrades. With its powerful engine and solid chassis, it can handle a wide range of modifications to enhance its performance capabilities.

Some of the most popular upgrades for the BMW 335i include ECU tuning, intake and exhaust upgrades, and suspension upgrades. These modifications can help to increase horsepower, torque, and overall driving performance.

It is important to note that while these upgrades can greatly enhance the driving experience of the BMW 335i, they should be done with care and consideration. Improperly installed or poorly chosen modifications can actually decrease performance and potentially harm the vehicle.

So, with the right modifications and careful consideration, the BMW 335i can be transformed into a truly impressive performance machine.

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