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GM LS3 Aluminum Engine Block from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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