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Air Injection Pump / Air Injectors
By OE Match
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928GTS 5.4L 1992-95
Bonded Rubber Bush M6 20x20 –
Multi-Application Mounting Bush
Sold each
High-quality bonded rubber bush M6 20x20 designed for a wide range of Porsche models including 986 Boxster, 996, 964, 968, and 928.
This versatile mounting bush is used in multiple engine bay
and chassis applications, including air pump mounting (986 Boxster and 996),
gearbox oil cooler mounting (928), and fuel filter mounting (964 and
968).
Fits:
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche 964 (911) C2 Speedster 1993
- Porsche 964 (911) C4 Speedster 1993
- 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 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928 GTS 5.4L 1992-95
Diagram ref no 3
Manufactured to OEM specifications, this bonded rubber mount provides excellent vibration isolation while ensuring secure positioning of critical components.
Key Features
• Bonded rubber bush M6 20x20
• Suitable for Porsche 986, 996, 964, 968, and 928
• Multi-application mounting solution
• Used for air pump, gearbox cooler, and fuel filter
• Reduces vibration and movement
• Durable rubber-metal bonded construction
• OEM-style fit and performance
Function and Purpose
This bush is designed to support and isolate mounted components.
It helps to:
• Secure components in position
• Absorb engine and drivetrain vibration
• Protect sensitive parts from stress and fatigue
• Maintain correct alignment
• Improve overall system reliability
Why Replace Rubber Mounting Bushes
Rubber components degrade over time due to heat and exposure.
Common issues include:
• Cracked or perished rubber
• Excessive movement or looseness
• Increased vibration transfer
• Potential damage to mounted components
Replacing worn bushes restores stability and prolongs
component life.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970346500
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
Sold as a set of 6.
We would recommend using some form of thread lock on these.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91121100000
The product you are viewing cross references to these numbers
OEMatch Air Injection Pump / Air Injectors — Fit, Function, Confidence
OEMatch Air Injection Pump / Air Injectors provide replacements and related items for Porsche models. OEMatch focuses on air injection pumps and injectors selected for Porsche applications. These parts support emissions control at cold start and help the catalytic converter reach operating temperature more quickly, improving idle stability until normal running temperature is achieved.
Available Types
- Air injection pumps
- Air injectors
- Associated hoses, check valves and mounting hardware
Understanding OEMatch Air Injection Pump / Air Injectors
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original air injection pumps and injectors.
OE (Original Equipment) refers to parts matching original specifications for the air injection pumps and injectors and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM air injection pumps and injectors engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
The secondary air injection system uses a pump and injectors to introduce fresh air into the exhaust stream during cold starts. This added air accelerates catalytic converter warm-up, encourages combustion of unburnt fuel, reduces hydrocarbon emissions and helps maintain a smooth idle while the engine reaches normal operating temperature.
Benefits Include
- Improved cold-start combustion and smoother idle
- More reliable emissions control during warm-up
- Reduced risk of catalytic converter overheating or contamination
Why Air Injection Pump / Air Injectors Wear and Fail
- Moisture ingress and internal corrosion of pump components
- Carbon and deposit build-up that blocks injector ports or valves
- Cracked or leaking hoses, valves or seals reducing airflow
- Electrical faults, relays or control issues affecting pump operation
The Importance of Replacing with OEMatch Air Injection Pump / Air Injectors
Replacing worn or faulty air injection pumps and injectors restores proper exhaust air delivery during cold start, helping the catalytic converter reach operating temperature promptly and reducing emissions. Timely replacement can improve drivability at idle, prevent downstream exhaust damage and support regulatory compliance for Porsche vehicles where emissions testing applies.
Advantages
- Direct-fit replacements engineered to match original dimensions and tolerances
- Components selected for compatibility with factory mounting points and clearances
- Options for pump, injector and associated hose or valve replacement without replacing unrelated assemblies
