What is the main benefit of installing the COBB SF Intake + Airbox?

The primary benefit is improved engine airflow. The larger diameter tube and dedicated airbox allow cooler, denser air to enter the engine more efficiently, which can lead to better throttle response and a more pronounced engine sound.

Does this intake system require custom tuning?

While the COBB SF Intake + Airbox is designed to be a direct replacement, COBB strongly recommends a custom tune to optimize performance and ensure your engine runs correctly with the increased airflow. Check COBB's website for specific tuning recommendations for your vehicle.

What materials is the intake tube made from?

The intake tube is constructed from smooth, mandrel-bent aluminum. This material choice helps maintain consistent airflow and durability.

2015 Subaru WRX STI SF Intake + Airbox

Name: Subaru SF Intake + Airbox 15-17 STI
Brand: COBB
SKU: cobb-subaru-sf-intake-airbox-15-17-sti-t14-557819G
Price: 552.96 USD
Availability: InStock

Subaru SF Intake + Airbox 15-17 STI

$552.96

In Stock

Fits 2015 Subaru WRX STI. The COBB SF Intake + Airbox is designed to improve airflow to your engine, giving it a more direct path for cooler, denser air.

Key Features

Fits 2015 Subaru WRX STI.
Features a large, 4-inch diameter intake tube constructed from smooth, mandrel-bent aluminum for improved airflow.
Includes a custom-designed airbox to isolate intake air from engine bay heat, ensuring cooler air enters the engine.
Designed as a direct bolt-on installation, requiring no welding or cutting.
The smooth internal surfaces of the intake tube minimize restrictions for more efficient air delivery.
Helps your engine breathe easier, potentially leading to improved throttle response and a more noticeable engine sound.

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Fits this vehicle

Subaru WRX STI 2015

Product Details

The COBB SF Intake + Airbox for your 2015 Subaru WRX STI is built with a large, 4-inch diameter intake tube. This substantial tubing allows for a much more direct path for air to enter your engine compared to the restrictive factory setup. By minimizing bends and maximizing the diameter, this system helps your engine breathe easier, which can lead to improved throttle response and a more satisfying engine note under acceleration.

This isn't just a simple tube; it's a complete system that includes a custom-designed airbox. The airbox is crucial because it isolates the intake air from the hot engine bay, ensuring that the air entering your engine is as cool and dense as possible. Cooler, denser air contains more oxygen, which your engine can use for a more efficient combustion process. The intake tube itself is constructed from smooth, mandrel-bent aluminum, which not only looks good under the hood but also ensures consistent airflow without any restrictions caused by uneven internal surfaces.

When you install the COBB SF Intake + Airbox, you're looking at a direct bolt-on installation that doesn't require any welding or cutting. This means you can get the benefits of improved airflow without making permanent modifications to your vehicle. The system is designed to work seamlessly with your car's existing systems, and it's a popular choice for WRX STI owners looking to get more out of their engine's breathing capabilities.