Caterpillar G3406 Natural Gas Engine from China
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 — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
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