Turbo Inlet Pipes

Is your turbo drawing air through a soft rubber hose with ribs and tight bends? A turbo inlet pipe replaces the original connection between the air filter and the compressor. It is for you if you want to give the turbo a smoother airflow in your project or replace a worn hose.

What a turbo inlet pipe does

The pipe carries filtered air from the air filter or airbox to the turbo's compressor inlet. Original pipes are often made of rubber or plastic with ribs. At high boost pressure and high air demand, they can collapse under the vacuum or create turbulence in the airflow. An aftermarket pipe made of, for example, aluminium or silicone can typically hold its shape better. How much difference it makes depends on the car and your other modifications. In this category you will find, for example, pipes and couplers from AWE Tuning and intake horns from Wehrli for the Duramax L5P. You will also find brands such as APR, Mishimoto and do88.

How to choose the right pipe

• Fitment: Check the part number against your engine and turbo, not just the car model.
• Diameter: A larger pipe is not automatically better. It must match the turbo inlet and the rest of the intake.
• Ports: Make sure the pipe has the fittings for crankcase ventilation, recirculation or sensors that your car requires.
• Compatibility: If you combine the pipe with a cold air intake kit or other intake tubes, the couplers must fit together.

Installation and maintenance

Cover the turbo inlet while the pipe is removed so no dirt falls in. Tighten all hose clamps correctly. A leak after the air filter can let unfiltered air reach the compressor wheel. Inspect the couplers regularly for cracks and loose joints. Whether the modification requires an ECU adjustment and whether it can be approved for road inspection depends on the product and the car. Check this for the specific part number.

Frequently asked questions

What is the difference between a turbo inlet pipe and a complete cold air intake?

A turbo inlet pipe only replaces the section leading into the compressor. A cold air intake kit typically also includes the filter and the piping up to the filter. One can often be installed without the other, depending on the car.

Does the ECU need to be adjusted after installation?

It depends on the car and the product. If the pipe changes the airflow around a mass airflow sensor or another sensor, it can affect the engine's readings. Read the product description for the specific part number before installing.

How do I spot a leaking or faulty intake pipe?

Signs can include a hissing sound under acceleration, lower boost pressure than normal or fault codes related to airflow. Also look for cracks, collapsed ribs and loose hose clamps at the couplers.