Oregon 30-909 Foam Air Filter Replacement for Briggs & Stratton 270528, 270528S 6, 7 and 8 HP vertical engines 146700, 147700, 170700, 171700, 190700 and 191700 series 8-5/8" L x 4-3/8" W x 1-1/2" H Pre-oiled Foam Air Filter Replaces Briggs # 270528, 270528S