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- 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
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
Diagram ref no 40
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157206130
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
For left-hand drive cars (LHD)
Porsche 986 Boxster 1998-04
Porsche 987.1 Boxster 2005-08
Porsche 987.2 Boxster 2009-12
Porsche 987C.1 Cayman 2005-08
Porsche 987C.2 Cayman 2009-12
Porsche 996 1998-05
Porsche 997.1 2005-08
Porsche 997.2 2009-12
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99657226302
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
Fits:
Porsche 986 Boxster 1997-04
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98657268102
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
For RHD cars
Porsche 986 Boxster 1997-04
Porsche 996 Boxster 1998-05
Porsche 987 Boxster 2005-08
Porsche 987.2 Boxster 2009-12
Porsche 987C Cayman 2006-08
Porsche 987C.2 Cayman 2009-12
Porsche 997.1 Carrera 2005-08
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Click 'Zoom in' for large parts diagram.
Diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99757255301
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
For RHD cars
Porsche 996 Carrera 1998-05
Porsche 996 Turbo 2001-05
Porsche 996 GT3 1999-05
Porsche 986 Boxster 1997-05
Porsche 987.1 Boxster 2005-08
Porsche 987.2 Boxster 200-12
Porsche 987C.1 Cayman 2006-08
Porsche 987C.2 Cayman 2009-12
Porsche 997.1 Carrera 2005-08
Porsche 997.1 Turbo 2007-10
Porsche 997 GT3 2007-11
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99757255501
The product you are viewing cross references to these numbers