APR Intake Filters - Porsche 911 (992) 3.0T/3.7TOur drop in intake filters are a direct replacement upgrade for the Porsche 911 (992) 3. 0T and 3. 7T engines. The proprietary performance intake filters use a high flow cotton gauze filtration material that was flow bench optimized and is directly compatible with the factory intake system and future APR intake systems. The filters flow up to 9% more than their stock counterparts. The intake system will see reduced pressure drop at the same flow