Porsche High-Flow Air Filter 911-341-043-01 Cleaner has two 1 7/8"

Cleaner has two 1 7/8" circular openings and one 1 3/8" x 1 1/8" rectangular opening

Enhanced Regeneration: Supports efficient DPF regeneration

two required

however you can install them instead of original ones and adjust with a screwdriver like in older models

Porsche High-Flow Air Filter 911-341-043-01 Cleaner has two 1 7/8"Porsche High Flow Air Filter. Elevate Your Engine's Performance Experience a surge of power and acceleration with the K&N High Flow Air Filter. Engineered to optimize airflow and minimize restrictions, this filter delivers exceptional performance while safeguarding your engine from harmful contaminants. Key Features: Enhanced Horsepower and Acceleration: The state of the art air filter media is designed to increase horsepower and acceleration,