Hoses / Pipes / Sleeves

Air Hose 12 x 3,7mm – Brake Servo & Inlet Manifold 
Sold by the metre

High-quality air hose designed for multiple Porsche applications, including brake servo (brake booster) systems and inlet manifold connections.

This hose is used on Porsche 911, 924, 928, 964 Carrera 2, and also within the inlet manifold system on 964 and 993 models. It plays a critical role in maintaining vacuum pressure for braking assistance and ensuring proper airflow within the intake system.

Fits:

• 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) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97
• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86

Supplied per metre, this hose allows precise length replacement and flexible routing, making it ideal for maintenance, repair, or restoration of Porsche vacuum and intake systems. Manufactured to OEM specifications for durability and reliable performance.

Key Features

• Multi-purpose air hose for vacuum and intake systems
• Suitable for Porsche 911, 924, 928, 964, and 993
• Part number 9991810225B
• Used for brake servo and inlet manifold applications
• Sold per metre for custom lengths
• Resistant to heat and vacuum pressure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose serves critical roles across multiple systems.

It helps to:
• Deliver vacuum pressure to the brake servo (booster)
• Maintain effective braking assistance
• Support airflow within the inlet manifold system
• Ensure stable engine operation and efficiency
• Prevent vacuum leaks that affect performance

Why Replace Air / Vacuum Hoses

Over time, hoses degrade due to heat and pressure cycles.

Common issues include:
• Cracking or splitting
• Vacuum leaks reducing brake efficiency
• Hardening and reduced flexibility
• Poor engine performance due to air leaks

Replacing worn hoses restores braking performance and engine efficiency.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9991810225B

The product you are viewing cross references to these numbers

Air Hose 12 x 3,7mm – Brake Servo & Inlet Manifold 
Sold by the metre

High-quality air hose designed for multiple Porsche applications, including brake servo (brake booster) systems and inlet manifold connections.

This hose is used on Porsche 911, 924, 928, 964 Carrera 2, and also within the inlet manifold system on 964 and 993 models. It plays a critical role in maintaining vacuum pressure for braking assistance and ensuring proper airflow within the intake system.

Fits:

• 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) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 993 (911) C2 1994-97
• Porsche 993 (911) C4 1994-97
• Porsche 993 (911) RS 1994-97
• Porsche 993 (911) C2S 1994-97
• Porsche 993 (911) C4S 1994-97
• Porsche 993 (911) TURBO 1994-96
• Porsche 993 (911) GT2 1994-97
• Porsche 993 (911) TURBO S 1994-97
• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86

Supplied per metre, this hose allows precise length replacement and flexible routing, making it ideal for maintenance, repair, or restoration of Porsche vacuum and intake systems. Manufactured to OEM specifications for durability and reliable performance.

Key Features

• Multi-purpose air hose for vacuum and intake systems
• Suitable for Porsche 911, 924, 928, 964, and 993
• Part number 9991810225B
• Used for brake servo and inlet manifold applications
• Sold per metre for custom lengths
• Resistant to heat and vacuum pressure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose serves critical roles across multiple systems.

It helps to:
• Deliver vacuum pressure to the brake servo (booster)
• Maintain effective braking assistance
• Support airflow within the inlet manifold system
• Ensure stable engine operation and efficiency
• Prevent vacuum leaks that affect performance

Why Replace Air / Vacuum Hoses

Over time, hoses degrade due to heat and pressure cycles.

Common issues include:
• Cracking or splitting
• Vacuum leaks reducing brake efficiency
• Hardening and reduced flexibility
• Poor engine performance due to air leaks

Replacing worn hoses restores braking performance and engine efficiency.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9991810225B

The product you are viewing cross references to these numbers

Hose - 4 x 9mm 
Sold by the metre

High-quality 4x9mm hose designed for Porsche 911 Turbo (1978–1983), 964 Turbo, and Porsche 928 (1978–1983) models, supplied per metre for precise fitment and flexible installation.

This hose is used within the inlet manifold system, where it plays a key role in maintaining correct airflow and vacuum balance. Proper function of this hose is essential for stable engine performance, efficient combustion, and reliable turbo operation.

Manufactured to OEM specifications, this hose provides durability, flexibility, and resistance to heat and pressure, making it ideal for maintenance, repair, or restoration of Porsche intake systems.

Key Features

• 4mm internal diameter, 9mm outer diameter
• Suitable for Porsche 911 Turbo (1978–1983), 964 Turbo, and 928 (1978–1983)
• Part number 00004320494
• Designed for inlet manifold and intake system use
• Sold per metre for custom length applications
• Resistant to heat and engine bay conditions
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose is an important part of the intake system.

It helps to:
• Maintain correct airflow within the inlet manifold
• Regulate vacuum pressure for engine systems
• Support efficient combustion and engine performance
• Prevent air leaks affecting drivability
• Ensure stable turbo and intake system operation

Why Replace Intake Hoses

Over time, intake hoses degrade due to heat and pressure.

Common issues include:
• Cracking or splitting
• Air leaks reducing engine performance
• Hardening and reduced flexibility
• Inconsistent engine operation

Replacing worn hoses restores proper airflow and engine efficiency.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

00004320494

The product you are viewing cross references to these numbers

Hose - 4 x 9mm 
Sold by the metre

High-quality 4x9mm hose designed for Porsche 911 Turbo (1978–1983), 964 Turbo, and Porsche 928 (1978–1983) models, supplied per metre for precise fitment and flexible installation.

This hose is used within the inlet manifold system, where it plays a key role in maintaining correct airflow and vacuum balance. Proper function of this hose is essential for stable engine performance, efficient combustion, and reliable turbo operation.

Manufactured to OEM specifications, this hose provides durability, flexibility, and resistance to heat and pressure, making it ideal for maintenance, repair, or restoration of Porsche intake systems.

Key Features

• 4mm internal diameter, 9mm outer diameter
• Suitable for Porsche 911 Turbo (1978–1983), 964 Turbo, and 928 (1978–1983)
• Part number 00004320494
• Designed for inlet manifold and intake system use
• Sold per metre for custom length applications
• Resistant to heat and engine bay conditions
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose is an important part of the intake system.

It helps to:
• Maintain correct airflow within the inlet manifold
• Regulate vacuum pressure for engine systems
• Support efficient combustion and engine performance
• Prevent air leaks affecting drivability
• Ensure stable turbo and intake system operation

Why Replace Intake Hoses

Over time, intake hoses degrade due to heat and pressure.

Common issues include:
• Cracking or splitting
• Air leaks reducing engine performance
• Hardening and reduced flexibility
• Inconsistent engine operation

Replacing worn hoses restores proper airflow and engine efficiency.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

00004320494

The product you are viewing cross references to these numbers

Air Injection Pump to Injection Pump Filter Hose 

High-quality air injection pump to injection pump filter hose designed for Porsche 911 Turbo and 964 Turbo models.

This hose forms part of the secondary air injection (emissions) system, connecting the air injection pump to the injection pump filter. It ensures proper airflow delivery within the system, supporting emissions control and efficient engine operation.

Fits:

• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93

Diagram ref no 18  

Manufactured to OEM specifications, this hose provides durability, flexibility, and resistance to heat and engine bay conditions, making it ideal for maintaining or restoring Porsche turbo emissions systems.

Key Features

• Air injection pump to filter hose
• Suitable for Porsche 911 Turbo and 964 Turbo
• Part number 99923900440
• Designed for emissions / secondary air system
• Ensures proper airflow and system efficiency
• Resistant to heat and engine bay conditions
• OEM-style fit and performance

Function and Purpose

This hose is a key component within the air injection system.

It helps to:
• Connect the air injection pump to the filter
• Deliver air efficiently through the emissions system
• Support proper combustion and emissions control
• Maintain correct airflow within the system
• Ensure reliable engine and environmental performance

Why Replace Air Injection Hoses

Over time, hoses within the emissions system degrade due to heat and exposure.

Common issues include:
• Cracking or splitting
• Air leaks affecting emissions performance
• Hardening and loss of flexibility
• Reduced system efficiency

Replacing worn hoses ensures proper emissions system function and engine performance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99923900440

The product you are viewing cross references to these numbers

Air Injection Pump to Injection Pump Filter Hose 

High-quality air injection pump to injection pump filter hose designed for Porsche 911 Turbo and 964 Turbo models.

This hose forms part of the secondary air injection (emissions) system, connecting the air injection pump to the injection pump filter. It ensures proper airflow delivery within the system, supporting emissions control and efficient engine operation.

Fits:

• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93

Diagram ref no 18  

Manufactured to OEM specifications, this hose provides durability, flexibility, and resistance to heat and engine bay conditions, making it ideal for maintaining or restoring Porsche turbo emissions systems.

Key Features

• Air injection pump to filter hose
• Suitable for Porsche 911 Turbo and 964 Turbo
• Part number 99923900440
• Designed for emissions / secondary air system
• Ensures proper airflow and system efficiency
• Resistant to heat and engine bay conditions
• OEM-style fit and performance

Function and Purpose

This hose is a key component within the air injection system.

It helps to:
• Connect the air injection pump to the filter
• Deliver air efficiently through the emissions system
• Support proper combustion and emissions control
• Maintain correct airflow within the system
• Ensure reliable engine and environmental performance

Why Replace Air Injection Hoses

Over time, hoses within the emissions system degrade due to heat and exposure.

Common issues include:
• Cracking or splitting
• Air leaks affecting emissions performance
• Hardening and loss of flexibility
• Reduced system efficiency

Replacing worn hoses ensures proper emissions system function and engine performance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99923900440

The product you are viewing cross references to these numbers

Hose Clamp For Air Intake System, 10-16MM.
Sold Each.

Fits:
Porsche 964 C2 1989>>1993
Porsche 964 C4 1989>>1993
Porsche 964 RS 3.6L 1991>>1993

Diagram Ref No 35

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9002720020B

The product you are viewing cross references to these numbers

Hose clamp, 12-22 mm - Various Applications.



Fits:
Porsche 911 - 1978 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 986 Boxster - 1997 to 2004
Porsche 996 - 1997 to 2005
Porsche 997.1 - 2005 to 2008



Related reference numbers
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99951255400

The product you are viewing cross references to these numbers

Hose For Air Intake System.

Fits:
Porsche 964 Turbo 3.6L 1991>>1993

Diagram Ref No 14

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96411054421

The product you are viewing cross references to these numbers

Intake vacuum hose - Check valve to Venturi tube.



Fits:
Porsche 911 Carrera 3.2L 1984-89
Porsche 964 C2 / C4 3.6L 1989-94
Porsche 993 C2 / C4 3.6L 1995-98

Click 'Zoom in' for large parts diagram.
Diagram ref no 24

Related reference numbers
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99918106841

The product you are viewing cross references to these numbers

Jetronic Hoses kit.



To Fit:
Porsche 911 (964 Turbo) 1990-1994 3.3L turbo Engines

DO88 hoses are entirely manufactured in high quality silicone for best finish and durability. With three to five layers of reinforcement depending of the inner diameter, the hoses withstand high pressure rates and high temperatures for a long time. The original hoses are manufactured in rubber that often cracks from age. This is a durable solution that in addition improves the looks!

Hoses included:

• Auxiliary air regulator hose Reference: 93011033506, 93060610200
• Auxiliary air regulator hose Reference: 93011033507
• Brake vacuum hose Reference: 93011037001
• Brake vacuum hose Reference: 210mm / ID 15mm
• Vacuum hose Reference: 93011054400
• Vacuum hose Reference: 93011071400

All part numbers from the vehicle manufacturer are only stated as reference.

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DO88-KIT161S

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Stainless steel clamp kit dor K Jetronic Hoses #DO88-KIT161S.



To Fit:
Porsche 911 (964 Turbo) 1990-1994 3.3L turbo Engines

The kit contains all necessary hose clamps to install the specified hose kit. The included clamps are a high quality standard design type in all stainless steel (W4 class) with a stamped band to minimise impact on hose surface.

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CLAMP-KIT161S

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Silicone coupler sleeve set for GT3 intake manifold plenum to throttle body. 
Sold as a set of 4

Fits:
Porsche 964 - 1989 to 1994 (with GT3 inlet upgrade)
Porsche 993 - 1994 to 1998 (with GT3 inlet upgrade)
Porsche 996 - 1997 to 2005 (with GT3 inlet upgrade)

The original rubber couplers for Porsche 996 and 997 GT3 models have become increasingly costly and hard to source, and many enthusiasts opt to avoid them for high-performance applications like hot rods or track cars due to their limited heat resistance.

Our precision-molded OEM+ silicone sleeves are the perfect direct replacement, offering double the temperature resistance of the original rubber couplers along with an enhanced appearance. These high-quality sleeves are essential for replacing worn-out rubber parts and are ideal for air-cooled hot rods undergoing a modern DBW (Drive-By-Wire) conversion using a GT3 intake plenum.

This set includes four silicone sleeves 

Replaces Porsche part number 99611068552 and 99611068650

Diagram ref no 9 and 11

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99611068650

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Silicone sleeve set for GT3 intake manifold. Porsche 964 / 993 / 996
Sold as a set of 6

Fits:
Porsche 964 - 1989 to 1994 (with GT3 inlet upgrade)
Porsche 993 - 1994 to 1998 (with GT3 inlet upgrade)
Porsche 996 - 1997 to 2005 (with GT3 inlet upgrade)

The original rubber couplers for Porsche 996 and 997 GT3 models have become increasingly costly and hard to source, and many enthusiasts opt to avoid them for high-performance applications like hot rods or track cars due to their limited heat resistance.

Our precision-molded OEM+ silicone sleeves are the perfect direct replacement, offering double the temperature resistance of the original rubber couplers along with an enhanced appearance. These high-quality sleeves are essential for replacing worn-out rubber parts and are ideal for air-cooled hot rods undergoing a modern DBW (Drive-By-Wire) conversion using a GT3 intake plenum.

This set includes six (6) silicone sleeves 

Replaces Porsche part numbers 99611068792 and 99611068790

Related reference numbers
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99611068792

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Stainless steel clamp kit for turbo inlet hoses #DO88-KIT159S.

To Fit:
Porsche 911 (964 Turbo) 3.3 Turbo 1990-1994

Kit of 4 clamps

The kit contains all necessary hose clamps to install the specified hose kit. The included clamps are a high quality standard design type in all stainless steel (W4 class) with a stamped band to minimise impact on hose surface.

Related reference numbers
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CLAMP-KIT159

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Vacuum valve rubber hose.



Fits:
Porsche 964 3.6L C2 / C4 / RS 1989-94

Click 'Zoom in' for large parts diagram.
Diagram ref no 25

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92811065205

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