The OEM airbox is typically optimized for performance. The most restrictive section comes in the OEM air filter which is generally designed to optimize mpg over performance. The Pro 5R oiled 5-layer progressively finer mesh cotton gauze media for maximum performance. The progressive layering of media allows the filter to flow at high levels even when dirty.
*2017+ Honda Civic Type-R
*Pro 5R Factory-Oiled Media for Maximum Performance
*100% Polyurethane Frame On All Sides For Extra Long Filter Life
*Washable and Reusable for Multiple Cleaning Cycles
*Guaranteed to increase in air flow and optimize the OEM airbox
*25mm Deep Rounded Open Pleats
*Progressive Bump Seal Design for a Perfect Fit