Shadow Performance
ST-Filter
High Flow Air Filter
Greater Airflow. Faster Flow. More Stable.
ST-Filter uses high-density micro-fiber material with a special pleated design, delivering 88% more airflow than factory paper filters and 32% greater fiber density. At high RPM, airflow exceeds 210g/s while reducing air resistance and turbulence. Real-world road tests show average gains of 3–5% in horsepower and torque. Washable and reusable — the ideal upgrade over disposable OEM filters.
- ✓Airflow +88% vs factory paper filter
- ✓Fiber density +32%, stronger filtration efficiency
- ✓210g/s+ airflow at high RPM, reduces resistance and turbulence
- ✓Horsepower & torque +3–5% (real-world road tested)
- ✓Washable and reusable, more cost-effective long-term
- ✓Direct drop-in replacement, no modification needed, high tensile strength
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High Flow Air Filter
The ST-Filter high-flow air filter, developed with electronic technology thinking, offers increased airflow, faster flow rates, and improved air stability. It is constructed using high-density microfiber materials with a special pleat design and high tensile strength, enhancing performance while maintaining protective qualities. After cleaning and drying, it can be reused, making it a perfect replacement for disposable factory filters.
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Spunlace Nonwoven Fiber Technology
Utilizing high-pressure water-needling technology to produce bonded fabric through fibers, it possesses high tensile strength and excellent breathability. As an air filter, it effectively reduces gas resistance, minimizes turbulence, and captures finer dust particles, meeting airflow requirements while providing outstanding dust filtration. Based on experimental results, compared to paper filters, increasing fiber density by 32% leads to an 88% increase in airflow — a greater volume of air passing through rapidly.
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Visible Results, No Guessing
To ensure the ST-Filter meets the intake demands of different vehicles, Shadow uses diagnostic instruments to log airflow data, confirming instant airflow can reach 210g/s or more at high RPM. After real-world dyno testing under identical conditions, switching from the factory filter to the ST-Filter delivers an average horsepower and torque increase of approximately 3–5% per vehicle.
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Economical and Environmentally Friendly
Paper air filters cannot be cleaned, and over time their physical properties deteriorate, reducing airflow and intake efficiency. Using compressed air on paper filters is not recommended — it can disrupt fiber density and trap fine dust, and oil contamination from air leaks cannot be removed. The ST-Filter not only improves performance but, thanks to its robust structure, allows repeated cleaning and maintenance. It directly replaces the original factory filter, reducing waste and recurring expenses.
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