Spearhead Max Thrust Engine Air Filter | OEM Fit, High Dust Capacity, Up to 15K Miles (MT-997)

Upgrade to clearer breathing for your Subaru with the Spearhead Max Thrust Engine Air Filter

The Max Thrust filter is designed to help your engine take in cleaner, cooler air, delivering a noticeable upgrade over stock for everyday driving and longer trips. Built with an OEM-like fit and a high dust capacity, it’s a practical upgrade that can translate to crisper throttle feel and more consistent performance as miles add up.

What sets this filter apart is its thoughtful filtration system. It uses a Hex-D pleat design to maximize dirt holding capacity while preserving airflow, so your engine can breathe easier even as the filter collects dust and debris. The multi-layer media works in concert to trap particles without creating a restrictive path for air, which helps your engine receive the clean air it needs to perform smoothly.

Key benefits at a glance

• Hex-D pleat geometry delivers higher dirt capacity without sacrificing airflow.
• Multi-layer media traps dirt more efficiently than standard filters, maintaining steady airflow.
• Lasts up to about 15,000 miles under typical driving conditions, reducing maintenance frequency.
• DIY replacement is straightforward, offering a cost-effective upgrade with OEM-fit confidence.
• Designed for compatibility with a broad Subaru lineup, providing a reliable upgrade over stock in many models.

Real-world use and feel

In daily commutes and longer road trips, drivers may notice steadier throttle response and a more consistent intake feeling as the engine receives clean air. While results can vary by driving style and environment, the design focuses on enabling your engine to perform with less effort when drawing air through the intake system.

For those who drive in dusty or windy conditions, the filter’s increased dirt-holding capacity helps limit debris closer to the air intake while maintaining airflow. The result can be a more stable engine intake experience without frequent filter changes, especially for higher-mileage vehicles or routes with frequent stop-and-go traffic.

Fitment and installation

Engineered for an OEM-like fit across a wide range of Subaru models. To confirm compatibility, the product notes indicate specific year ranges and models; in short, enter your year, make and model to verify fitment before purchasing.

Compatibility highlights include Crosstrek (2016–2017; non-hybrid), Forester (2009–2018; non-2008), Impreza (2008–2016), Legacy/Outback (2005–2019), Tribeca (2008–2014), WRX (2012–2021), and WRX STI (2013–2018; not for 2018 Type RA). These guidelines help customers decide if this upgrade aligns with their vehicle’s configuration.

Whether you’re performing a DIY replacement or simply considering a maintenance upgrade, this filter aims to offer a straightforward swap that may reduce trips to the shop and keep your engine breathing cleanly over time.