Excellent. I work with filters daily, microns, pressure drop, flow, viscosity.Flow numbers are a gimmick it meet's OEM standards. I use to be an ASE Mechanic for over 20+ years.
STP air filters are from the world's most recognized brand and leading filter specialists. Exclusive Micro-Pore advanced technology air filter media provides higher dirt holding capacity for maximum engine protection. Changing your dirty air filter can improve fuel efficiency and performance.
- STP air filters are ISO 5011 tested to meet or exceed OEM fit and quality requirements
- Protects vital engine parts from dirt and dust
- High efficiency air filter media provides maximum dirt holding capacity
- Higher filtering efficiency for a cleaner engine and longer engine life