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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General High silicon molybdenum exhaust manifolds for use in compression-ignition internal combustion piston engines (diesel or semi-diesel engines) with cylinder capacity of 2,300 cc or more but not exceeding 20,000 cc, each manifold measuring at least 80 cm but not exceeding 200 cm in length, at least 10 cm but not over 200 cm in width, and at least 10 cm but not exceeding 200 cm in height (provided for in subheading 8409.99.91)................................................................................... 1/ 9902.15.43 On or before 12/31/2020 No change No change 1.9% 1/ Connecting rods designed for use in compression-ignition internal combustion piston engines (diesel or semi-diesel engines) for vehicles of subheading 8701.20 or heading 8702, 8703, or 8704, each rod measuring at least 20 cm but not exceeding 120 cm in length, at least 10 cm but not exceeding 60 cm in width, and at least 5 cm but not exceeding 90 cm in height (provided for in subheading 8409.99.91)....................... 1/ 9902.15.44 On or before 12/31/2020 No change No change 0.4% 1/ Cast iron crankcases, suitable for use solely or principally with marine propulsion engines, each crankcase measuring more than 1.1 m in length (provided for in subheading 8409.99.92)................................................................................... 1/ 9902.15.45 On or before 12/31/2020 No change No change Free 1/ Cast-iron cylinder heads suitable for use solely or principally with marine compression-ignition engines, such parts with cylinder bore over 125 mm and weighing over 32 kg each (provided for in subheading 8409.99.92)................................... 1/ 9902.15.46 On or before 12/31/2020 No change No change Free 1/ Pistons suitable for use solely or principally with marine propulsion engines, such pistons each having a cast steel crown and aluminum body, weighing 12 kg or more (provided for in subheading 8409.99.92).................................................... 1/ 9902.15.47 On or before 12/31/2020 No change No change Free 1/ Fuel-injection pump assemblies, designed for compression-ignition internal combustion engines with a capacity of 6.4 liters and with output of less than 1000 kW of power (provided for in subheading 8413.30.10), the foregoing other than used goods.................................................................. 1/ 9902.15.48 On or before 12/31/2020 No change No change Free 1/ Fuel-injection pumps, designed for compression-ignition engines having an output of 1000 kW or greater, each pump weighing 60 kg or more and capable of generating a pressure greater than 1200 bar, such pumps designed for use in a common rail fuel system (provided for in subheading 8413.30.10), the foregoing other than used goods................... 1/ 9902.15.49 On or before 12/31/2020 No change No change Free 1/ Used fuel, lubricating or cooling medium pumps designed for internal combustion piston engines (provided for in subheading 8413.30.10 or 8413.30.90).......................................................... 1/ 9902.15.50 On or before 12/31/2020 No change No change 0.6% 1/ 1/ See chapter 99 statistical note 1. Rates of Duty 1 Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - II - 140 Note:The shaded areas indicate the provision has expired