S&B Filters 75-1514-1 Cold Air Intake Kit (Cleanable, 8-ply Cotton Filter) Custom air box protects the filter from engine heat and dirt along with a clear lid allowing for easy filter inspection and removal. Street Legal In All 50 US States Warranty: Million Mile Limited Warranty ISO 5011 TEST RESULTS Airflow Rating: Flows 68.5% Better than the Stock Intake Efficiency Rating: 99.45% Efficient @ 345.1 CFM (ISO Course Dust)