8409.91.30.00 - Aluminum cylinder heads

This HTS classification, 8409.91.30.00, specifically covers aluminum cylinder heads designed for installation in certain vehicles. These cylinder heads are integral components of spark-ignition internal combustion piston engines, which are commonly found in a wide range of automobiles, trucks, and other motor vehicles falling under specific headings and subheadings of Chapter 87. The material composition, being aluminum, is a key defining characteristic for this sub-classification.

This category is distinguished from its sibling, 8409.91.50 ("Other"), by its explicit restriction to cylinder heads that are intended for installation in vehicles classified under subheadings 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or headings 8702, 8703 or 8704. While both categories relate to parts for spark-ignition engines, 8409.91.30.00 applies only to those destined for these particular vehicle types and is further narrowed by its aluminum material.

As this is a leaf node in the HTS classification structure, there are no further subcategories. Therefore, the classification is considered final for aluminum cylinder heads intended for the specified vehicle types. Classification professionals should ensure that the physical product meets the criteria of being a cylinder head, made of aluminum, and explicitly intended for installation in the vehicles referenced in the subheading text to ensure correct import duties and regulations are applied.