WARNING: This product can expose you to chemicals that are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.p>The APR High-Flow Intake Filters (RF100031) are a premium performance upgrade for the Porsche 911 (991.1) platform. Specifically designed for the 3.4L and 3.8L naturally aspirated engines, these filters replace the restrictive, mass-produced paper elements found in the factory airbox. Utilizing APR’s proprietary washable cotton-gauze filtration media, these filters reduce pressure drop, allowing the engine to breathe more efficiently and providing a noticeable improvement in throttle response and induction sound.
Every APR filter is flow-bench optimized to deliver maximum airflow without compromising the critical filtration needed to protect your flat-six engine. Because the media is washable and reusable, these filters represent a one-time investment that provides long-term value and performance. This is the ideal "stealth" upgrade for 991.1 owners looking to sharpen their driving experience while maintaining an entirely stock engine bay appearance.
Key Features:
- Direct Drop-In Performance: Precision-sized at 275mm x 194mm for a perfect, airtight fit in the factory Porsche 991.1 airbox.
- Proprietary High-Flow Media: Multi-layer cotton-gauze material flows significantly more air than standard paper filters at every flow rate.
- Washable & Reusable: Designed for the life of the vehicle; simply clean and re-oil to restore to peak performance.
- Sharper Throttle Response: Reduced induction restriction leads to more immediate power delivery and engine feedback.
- Enhanced Induction Sound: Slightly increases the natural, aggressive intake note of the Porsche flat-six engine.
- Flow-Bench Optimized: Engineered to minimize pressure drop, meaning the engine works less to produce more power.
- Emissions Safe: 100% compliant with emissions standards and will not trigger check engine lights.
Technical Specifications:
| Specification | Details |
|---|---|
| Dimensions | 275 mm x 194 mm |
| Filter Material | Proprietary Cotton-Gauze (Oiled) |
| Construction | High-Strength Injection Molded Frame |
| Service Life | Washable / Reusable for Life |
Installation Note: Accessing the air filters on the 991.1 platform requires the removal of the rear bumper and spoiler assembly. Professional installation is recommended if you are unfamiliar with this procedure.
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