Intake manifolds

Intake manifolds for heavy-duty vehicle engines

In this category on enriquerequena.com you will find a specialized selection of intake manifolds for industrial vehicles and heavy machinery. This component is essential for distributing air (and, depending on the system, recirculated gases) to the cylinders, helping optimize cylinder filling, combustion efficiency, and engine performance under high-load conditions.

Our catalogue is designed for professional workshops, mechanics, and fleet managers looking for reliable replacement parts for trucks, buses, and commercial vehicles. Replacing a worn or damaged manifold helps restore intake sealing, prevent power losses, and reduce failures linked to air leaks, carbon build-up, or heat-related deformation.

Key points when choosing the correct intake manifold

• OEM reference: Match the original part number to ensure full compatibility with your engine.
• Engine code and application: Check the engine code and year range, as the same vehicle model may use different variants.
• Configuration and fittings: Confirm whether it includes a throttle body, sensor ports (MAP/IAT), vacuum connections, or EGR-related passages.
• Material and design: Verify whether the manifold is aluminum or reinforced polymer and that the layout matches the OE design.
• Gaskets and sealing: Check whether gaskets are included or must be purchased separately to guarantee airtight installation.

Frequently Asked Questions

What is the function of an intake manifold in an industrial vehicle?

Its function is to route and distribute air to the cylinder head intake ports, ensuring stable airflow for combustion. In modern engines it may also integrate sensor locations and systems related to EGR flow or swirl control.

What are the symptoms of a faulty intake manifold?

Common symptoms include power loss, unstable idle, whistling or leak noises, increased fuel consumption, abnormal smoke, and fault codes related to air pressure/flow. Oil traces may also appear if the crankcase ventilation is connected to the intake system.

Do I need to replace the gaskets when changing the manifold?

Yes, it is strongly recommended to fit new gaskets. Aged seals can cause unmetered air intake, mixture errors, and recurring issues after the repair.

Is the intake manifold the same across all engine versions?

No. It can vary due to emissions standards, EGR configuration, sensors, or internal design. To avoid mismatches, always verify the OEM reference and engine code before ordering.