Find HS Code and trade information for auto parts: intake pipe

Intake Pipe

An intake pipe, also known as an intake manifold runner, is a crucial component of an internal combustion engine, responsible for delivering air from the air filter to the engine cylinders.

Material

Intake pipes are commonly constructed from the following materials:

• Aluminum: Widely used due to its lightweight nature and excellent heat dissipation properties. Aluminum allows for faster engine response and improved volumetric efficiency.
• Plastic: Often used in modern vehicles for cost-effectiveness and design flexibility. Plastic manifolds can be molded into complex shapes to optimize airflow.
• Composite: Materials like carbon fiber reinforced polymers are employed in high-performance applications, offering a balance of lightweight construction and strength.
• Cast Iron: Older engine designs frequently used cast iron for its durability and cost, though it is heavier than other materials.

Purpose

The primary purpose of the intake pipe is to efficiently and evenly distribute air to each cylinder, enabling optimal combustion. It contributes to:

• Airflow Management: Directs airflow from the air filter to the cylinders.
• Volumetric Efficiency: Maximizes the amount of air entering the cylinders, improving engine power and efficiency.
• Combustion Process: Supports a balanced air-fuel mixture for complete and efficient combustion.

Function

The intake pipe functions by:

• Air Distribution: Splitting the incoming airflow into individual runners, each leading to a specific cylinder.
• Airflow Smoothing: Reducing turbulence and resistance to promote laminar airflow.
• Mounting Point: Providing mounting points for components like fuel injectors and throttle bodies.
• Heat Management: Dissipating heat from the engine to maintain consistent air temperature.

Usage Scenarios

Intake pipes are integral to the operation of all internal combustion engines, found in:

• Passenger Vehicles: Essential for everyday driving and performance.
• Performance Vehicles: Upgraded intake pipes, often constructed from lighter materials, enhance engine power and responsiveness.
• Trucks and Buses: Heavy-duty intake pipes ensure reliable air delivery for larger engines.
• Motorcycles: Compact intake pipes designed for specific engine configurations.

Common Types

• Short Runner Intake Manifold: Designed for high-RPM performance, offering minimal airflow restriction.
• Long Runner Intake Manifold: Optimized for low-RPM torque, providing increased airflow velocity.
• Variable Geometry Intake Manifold (VGIM): Adjusts runner length based on engine speed, offering a balance of low- and high-RPM performance.
• Tunnel Intake Manifold: Features a single plenum chamber distributing air to all cylinders, often found in high-performance engines.
• Individual Throttle Bodies (ITB): Each cylinder has its own throttle body, providing precise throttle control and improved responsiveness.

Auto Parts: Intake Pipe Classification

Based on the provided information, classifying "intake pipe" as an auto part requires careful consideration of its material and specific function. The following HS codes may be relevant:

• 8409911040: Parts suitable for use solely or principally with the engines of heading 8407 or 8408: Other: Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines): Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704.

  • Chapter 84: Machinery and mechanical appliances; parts thereof. This chapter broadly covers parts used in engines and vehicles.
  • Heading 8409: Parts suitable for use solely or principally with the engines of heading 8407 or 8408. This heading specifically targets engine components.
  • Subheading 8409911040: Further specifies cast-iron parts for spark-ignition engines, with limitations on processing (cleaning and basic machining only). This code is applicable if the intake pipe is made of cast iron and meets the processing criteria.

• 8409991040: Parts suitable for use solely or principally with the engines of heading 8407 or 8408: Other: Other: Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704.

  • Chapter 84: Machinery and mechanical appliances; parts thereof.
  • Heading 8409: Parts suitable for use solely or principally with the engines of heading 8407 or 8408.
  • Subheading 8409991040: This code covers other engine parts, also with the cast-iron and processing limitations.

• 8487900080: Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, and not specified or included elsewhere in this chapter: Other Other.

  • Chapter 84: Machinery and mechanical appliances; parts thereof.
  • Heading 8487: Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features. This heading is for non-electrical engine components.
  • Subheading 8487900080: This code is a general category for other machinery parts not specifically classified elsewhere.

• 7326908688: Other articles of iron or steel: Other: Other: Other: Other.

  • Chapter 73: Articles of iron or steel.
  • Heading 7326: Other articles of iron or steel.
  • Subheading 7326908688: This is a very general category for other iron or steel articles.

Important Considerations:

• Material Verification: If the intake pipe is made of cast iron, carefully verify that it has not undergone processing beyond cleaning and basic machining (removal of fins, gates, sprues, risers).
• Engine Type: The applicability of HS codes 8409911040 and 8409991040 depends on whether the intake pipe is specifically for spark-ignition engines.
• Electrical Components: If the intake pipe contains any electrical connectors, insulators, coils, or contacts, HS codes 8409911040, 8409991040 and 8487900080 are not applicable.
• Tax Rate: Please note that HS codes 8409911040 and 8409991040 have a total tax rate of 55.0%, while HS codes 8487900080 and 7326908688 have tax rates of 83.9% and 82.9% respectively.