HTS code 8407.32.20 covers "Spark-ignition reciprocating or rotary internal combustion piston engines › Aircraft engines › Of a cylinder capacity exceeding 50 cc but not exceeding 250 cc › To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.