Wastegates: Explained

For car enthusiasts and performance drivers, understanding the role of a wastegate in a turbocharged engine is crucial. A wastegate is a valve that diverts exhaust gases away from the turbine wheel in a turbocharger, controlling the maximum boost pressure in the turbocharger system to prevent damage and ensure optimal performance. This page will provide a comprehensive guide to wastegates, their function, benefits, and selection process.

What is a Wastegate?

A wastegate is a device that regulates the flow of exhaust gases in a turbocharged engine. It operates by diverting a portion of the exhaust gases away from the turbine wheel, thereby controlling the speed of the turbine and the amount of boost the turbocharger can produce. This regulation prevents the turbocharger from spinning too quickly, which could lead to damaging levels of boost pressure.

Types of Wastegates

There are two main types of wastegates: internal and external.

  • Internal Wastegates: These are built into the turbocharger and are commonly found in most factory turbocharged vehicles. They are compact and cost-effective, but may not offer the same level of control as external wastegates.
  • External Wastegates: These are separate units that are installed in the exhaust system. They offer superior control over boost pressure and are typically used in high-performance applications. However, they are more expensive and require more complex installation.

Benefits of a Wastegate

Installing a wastegate in your turbocharged vehicle offers several benefits:

  • Boost Control: A wastegate provides precise control over the boost pressure in your turbocharger, ensuring optimal performance and preventing damage to the engine.
  • Improved Performance: By controlling the boost pressure, a wastegate can help your turbocharger operate more efficiently, leading to improved engine performance.
  • Increased Durability: By preventing overboosting, a wastegate can extend the lifespan of your turbocharger and engine.

Choosing the Right Wastegate

When selecting a wastegate, consider the following factors:

  • Vehicle Type: The type of vehicle and its intended use will determine whether an internal or external wastegate is more suitable.
  • Boost Levels: The desired boost levels will influence the size and type of wastegate needed.
  • Installation: Consider the complexity of installation. While internal wastegates are generally easier to install, external wastegates may require professional installation.


Whether you’re a seasoned car enthusiast or new to the world of car modifications, understanding the role and benefits of a wastegate is essential. By controlling boost pressure, a wastegate can improve the performance and longevity of your turbocharged engine. Explore our range of wastegates today to find the perfect fit for your vehicle and performance needs.

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