S&B Filters 75-3030-1 DISCONTINUED 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 49.5% Better than the Stock Intake Efficiency Rating: 99.84% Efficient - ISO Course Dust (S&B stopped 1.15% more dirt than GM and still improved the air flow by 49.5%)