Vent Line Muffler for Auxiliary Heating. Porsche 911 65-76  ❭  90157206130

Vent Line Muffler (Silencer) for Auxiliary Heating 

Maintain the correct operation and refinement of your classic Porsche heating system with this OE Match Vent Line Muffler (Silencer) for the auxiliary heating system. Designed to replace the original component fitted to early air-cooled Porsche 911 models, this precision-manufactured part helps reduce airflow noise within the heater ventilation circuit while ensuring efficient operation of the auxiliary heating system.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC

Manufactured to OE specifications, this vent line muffler provides accurate fitment and dependable performance, making it an ideal choice during restoration, heater system refurbishment or preventative maintenance. As many original components have now become brittle, corroded or damaged after decades of service, replacing this often-overlooked part helps restore the smooth and quiet operation of the heating and ventilation system.

Whether you're carrying out a concours restoration or simply refreshing your Porsche's heating system, this OE Match component delivers the quality and fit expected for classic air-cooled models.

What Does the Auxiliary Heating Vent Line Muffler Do?

The vent line muffler forms part of the auxiliary heating and ventilation system.

Its purpose is to:

• Reduce airflow and induction noise within the heating system.
• Smooth airflow through the vent line.
• Help maintain efficient heater operation.
• Reduce unwanted resonance from the ventilation circuit.
• Contribute to a quieter and more refined cabin environment.
• Support the correct functioning of the auxiliary heating system.

Although compact, this component plays an important role in maintaining the original characteristics of the Porsche heating system.

Why Replace the Vent Line Muffler?

Years of exposure to heat, moisture, vibration and engine bay contaminants can cause the original vent line muffler to deteriorate.

Common reasons for replacement include:

• Corrosion.
• Internal deterioration.
• Physical damage.
• Blockages restricting airflow.
• Age-related wear.
• Heater system refurbishment.
• Restoration projects.
• Missing original components.

Replacing worn heating components helps restore correct airflow while maintaining the efficiency and refinement of the ventilation system.

Symptoms of a Worn or Damaged Vent Line Muffler

Signs that the component may require replacement include:

• Increased airflow or induction noise from the heating system.
• Reduced heater efficiency.
• Restricted airflow.
• Rattling or vibration within the vent line.
• Visible corrosion or damage.
• Missing heater system components.
• Poor overall heating system performance.

Replacing the vent line muffler helps restore proper airflow characteristics and contributes to quieter heater operation.

Benefits

• Restores quieter heater operation.
• Helps maintain correct airflow.
• Supports efficient auxiliary heating performance.
• Replaces worn or corroded original components.
• Improves overall refinement.
• Easy direct-fit installation.
• Long-lasting durability.

Why Choose OE Match Heating Components?

OE Match heating and ventilation components are manufactured to provide factory-quality fitment, dependable performance and long service life for classic Porsche models. Designed using high-quality materials and precision manufacturing processes, this vent line muffler restores the original operation of the auxiliary heating system while preserving the authentic character of your air-cooled Porsche. It is an excellent choice for restoration specialists and enthusiasts looking to maintain both comfort and originality.