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New in box The K&N 33-2042 Replacement Air Filter is a premium, washable, and reusable high-flow engine panel filter engineered to optimize airflow by up to 50% compared to typical disposable paper elements. Meticulously constructed using four layers of pleated, oiled cotton gauze media held within a highly flexible frame, it ensures up to 99% filtration efficiency to safely maximize horsepower and acceleration. Custom-molded fit covering select vintage and late-model GM and Isuzu light trucks, mid-size SUVs, and sports cars, notably including the 1991–2005 Chevrolet Blazer / GMC Jimmy (4.3L V6), 1991–2004 Chevrolet S10 / GMC Sonoma (4.3L V6), 1993–2002 Chevrolet Camaro / Pontiac Firebird (3.4L, 3.8L V6 & 5.7L V8), 1990–2005 Chevrolet Astro / GMC Safari (4.3L V6), and the 1996–2000 Isuzu Hombre (4.3L V6).