8407.34.05.30 - Not exceeding 37.3 kW

This HTS category specifically classifies internal combustion piston engines that are designed for spark ignition and are intended for use in reciprocating or rotary internal combustion engines. The key defining characteristics for inclusion here are that the engines must have a cylinder capacity not exceeding 2,000 cubic centimeters (cc) and are designated for installation in tractors suitable for agricultural use. This means the engine's design, specifications, and intended application are all critical factors for classification under this subheading.

This category is distinguished from its sibling category, "Exceeding 37.3 kW," by a specific power output threshold. While both are subheadings within reciprocating piston engines for vehicles of chapter 87 with a cylinder capacity not exceeding 2,000 cc and destined for agricultural tractors, this particular classification applies to engines with a power output *not exceeding* 37.3 kilowatts (kW). The sibling category would encompass similar engines that surpass this power output level.

As this is a leaf node, there are no further subcategories to introduce. Therefore, classification under HTS code 8407.34.05.30 depends entirely on meeting the criteria of being a spark-ignition reciprocating piston engine, not exceeding 2,000 cc cylinder capacity, not exceeding 37.3 kW power output, and specifically intended for installation in agricultural tractors. Examples of engines that would fall here include those powering smaller utility tractors used in farming and gardening.