Caterpillar G3406 Natural Gas Engine from Japan
The Caterpillar G3406 is a high-performance spark-ignition reciprocating internal combustion engine designed to run on natural gas, commonly used in oilfield and industrial power generation applications. It falls under HTS 8407.90.90.10 as a gas engine other than for vehicles, featuring advanced fuel management for efficient combustion of natural gas. This engine's robust design supports continuous duty cycles in stationary setups.
Duty Rate — Japan → United States
25%
Rate breakdown
9903.82.0925%Except as provided for in headings 9903.82.16, 9903.82.20–9903.82.26 and 9903.85.68, articles of copper and derivative aluminum and steel articles, as provided for in subdivisions (c)(vi)–(viii) and (xi) of U.S. note 16 to this subchapter
9903.05.900%Articles of aluminum, of steel or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; patented pharmaceutical articles; and semiconductor articles, as provided in subdivision (f) of U.S. note 52 to this subchapter
Import Tips
• Verify engine displacement and fuel type certification to confirm classification under gas engines; obtain EPA emissions compliance documentation for natural gas models
• Common pitfall: misclassifying as diesel due to similar appearance—check fuel system specs