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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FAQ
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FAQ
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How do I find the right ST-Filter for my car?
Use the vehicle search on this page — search by brand and model, and each entry shows the matching SW part number. If your car isn't listed, email info@autojaw.com with your model, year, and engine, and we'll confirm the right fit.
My vehicle isn't on the list. Does that mean there's no filter for it?
Not necessarily — the compatibility list keeps growing. Send us your vehicle details and we'll check whether an existing part fits or a new one is on the way.
Does installation require any modification?
No. ST-Filter is a direct drop-in replacement for the factory air filter — open the stock airbox, swap the filter, done. No changes to the intake system. If you're running an aftermarket intake kit or a special-spec setup, fitment depends on the vehicle — contact us first to confirm.
Is it reusable?
Yes. ST-Filter is a washable filter — clean it periodically and keep using it, instead of buying a new one every service. Over time that costs less than disposable filters.
How often should I clean it?
It depends on where you drive. For everyday road use, checking it at your regular service interval is enough. If you often drive on dusty roads, mountain routes, or long distances, check and clean it more frequently.
How do I clean it? Can I rinse it with water?
Water is fine — the order is what matters. Remove the filter, blow the surface dust off with an air gun from a distance, then rinse gently with a soft stream of water. Let it dry completely before it goes back in the car.
Will cleaning affect the airflow sensor or trigger a check engine light?
Proper cleaning and complete drying keep that risk low. ST-Filter needs no filter oil, so maintenance stays simpler than with oiled filters — the most common issue is reinstalling the filter before it has fully dried, so give the drying step the time it needs.
Will it add power?
A high-flow filter's job is intake efficiency. What you may notice is a more direct intake response and smoother running; how much depends on your car's condition, engine setup, and supporting parts. Our published figures come from specific test conditions — individual results vary.
How is it different from the factory filter?
They aim at different things. A stock paper filter is built around stable filtration and scheduled replacement; a washable high-flow filter like ST-Filter focuses on intake efficiency and long-term running cost. Neither is wrong — they suit different owners.
Won't more airflow let dirt into the engine?
A properly engineered high-flow filter is exactly that balance — filtration efficiency against airflow. The real question isn't whether the concept is safe; it's whether the filter matches your car's spec, is installed correctly, and is maintained on schedule. Get those three right and protection and performance go together.
Will it affect my vehicle warranty?
The air filter is a regular service part, and ST-Filter installs in the stock airbox without any modification. You can switch back to the factory filter anytime.
