Protects carburetor and engine from dirt and debris 5-1/8" - Diameter 2-1/2" - Tall Will not fit Holley dominator or Holley style carbs equipped w/ Manual or electric chokes. Includes Air Filter Nut (1/4") with O-Ring to be used with Carb. Hat and Air Filter. Protects carburetor and engine from dirt and debris. 5-1/8" - Diameter. 2-1/2" - Tall. Will not fit Holley dominator or Holley style carbs equipped w/ Manual or electric chokes. Includes Air Filter Nut with O-Ring to be used with Carb. Hat and Air Filter.