GM LS3 Aluminum Engine Block from Mexico
Semi-finished 6.2L LS3 aluminum engine block casting for GM Gen IV small block V8 spark-ignition engines. Features priority main oiling and 4.065-inch bore provisions. 8409.91.99 as principal unfinished part for spark-ignition piston engines.
Duty Rate — Mexico → United States
12.5%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Bore spacing and main cap girder design diagrams establish LS-series specificity
• Machining allowance specifications distinguish from fully machined blocks (8483)
• Foundry pour card and alloy certification (319 aluminum) required for validation