Heater hoses & pipes

Pipe Clamp B20x18 – Multi-Position Clamp 
Sold each

High-quality pipe clamp B20x18 designed for a wide range of securing applications across Porsche 911, 924S, 928, and 914 models.

This versatile clamp is used in multiple locations including air conditioning pipes, wiring looms, power steering lines, clutch cables, and heating system components, making it an essential part for maintaining correct routing and system integrity throughout the vehicle.

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 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95
• Porsche 914 (1970-1976)

Manufactured to OEM specifications, this clamp ensures secure fitment, durability, and resistance to corrosion. Supplied individually, it allows flexible replacement for maintenance, repair, or restoration projects.

Key Features

• Pipe clamp size B20x18
• Suitable for Porsche 911, 924S, 928, and 914
• Part number 99951107602
• Multi-use: AC pipes, wiring looms, steering, clutch, heating
• Ensures secure mounting and routing
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually

Function and Purpose

This clamp is designed to secure various components across the vehicle.

It helps to:
• Hold pipes, hoses, and cables firmly in place
• Maintain correct routing and alignment
• Prevent vibration-related wear and damage
• Protect sensitive components such as wiring looms
• Support long-term system reliability

Why Replace Pipe Clamps

Clamps can degrade over time due to heat and environmental exposure.

Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Movement of pipes or cables
• Increased risk of wear or failure

Replacing worn clamps ensures proper securing and protects system components.

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99951107602

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Clamp – Power Steering & AC Hose Clamp 
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High-quality clamp designed for securing power steering and air conditioning hoses on Porsche 911 and 928 models.

This clamp ensures hoses are firmly held in place, maintaining correct routing and preventing movement, vibration, or potential damage within the engine bay. It plays an important role in supporting both power steering system reliability and air conditioning performance.

Fits:

• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1987-1989 3.3L Turbo (930)
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram ref no 32

Manufactured to OEM specifications, this clamp offers precise fitment, durability, and corrosion resistance. Supplied individually, it is ideal for maintenance, repair, or restoration of Porsche hose systems.

Key Features

• Suitable for Porsche 911 and Porsche 928
• Part number N020601A
• Designed for power steering and AC hose applications
• Ensures secure hose mounting and routing
• Prevents vibration-related wear and damage
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually

Function and Purpose

This clamp is a critical hose securing component.

It helps to:
• Secure power steering hoses in position
• Maintain correct routing of AC lines
• Prevent hose movement and vibration
• Protect hoses from wear and damage
• Ensure reliable system operation

Why Replace Clamps

Clamps can degrade over time due to heat and environmental exposure.

Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Hose movement or misalignment
• Increased risk of leaks or system failure

Replacing worn clamps ensures secure installation and protects critical systems.

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

N020601A

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Clamp power steering hose and AC hose by Design911 for selected Porsche 911 and 928 models. This part helps keep hose runs correctly supported and positioned within the engine bay, matching original mounting points and clearances where applicable.

What This Product Does

This clamp secures power steering and air conditioning hoses to help maintain correct routing, limit unwanted movement and reduce chafing against nearby components. For Porsche applications, it is used as a direct-fit replacement engineered to match original dimensions and tolerances.

Functions

• Secures power steering hose runs
• Supports AC hose routing
• Helps reduce hose movement
• Helps limit vibration-related wear
• Maintains correct positioning in the engine bay

Why Replacement Matters

• Old clamps can lose tension through age, heat and general exposure
• Corrosion or fatigue may affect how firmly the hose is retained
• Poor hose support can allow movement, rubbing or misalignment
• Replacing worn hardware helps support correct fit and function

Fits

• Porsche 911 and 912 1965–1989
• Porsche 911 3.2L G50 1987–1989
• Porsche 911 3.3L Turbo 930 1978–1989
• Porsche 928 1978–1995
• Porsche 928S4 5.0L 1987–1992
• Porsche 928GT 5.0L 1989–1991
• Porsche 928GTS 5.4L 1992–1995

Check fitment for your specific Porsche model, year and engine before ordering.

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N020601A

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Heater Valve Connecting Hose – Coolant System Hose 

High-quality replacement heater valve connecting hose designed for Porsche 928 models from 1985 to 1995.

This hose connects the heater valve within the cooling system, allowing proper coolant flow to the heater matrix. It plays a critical role in maintaining effective cabin heating and overall cooling system performance.

Fits:

• Porsche 928S2 4.7L 1985-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram ref no 4

Manufactured to OEM specifications, this hose ensures precise fitment, durability, and resistance to heat and pressure—ideal for maintenance, repair, or restoration of your Porsche 928.

Key Features

• Direct replacement heater valve connecting hose
• Suitable for Porsche 928 (1985–1995)
• Ensures correct coolant flow to heater system
• OEM-style fit and performance
• Heat- and pressure-resistant construction
• Ideal for cooling and heating system maintenance

Function and Purpose

This hose forms part of the vehicle’s cooling and heating system.

It helps to:

• Transfer coolant to and from the heater valve
• Support efficient cabin heating performance
• Maintain proper coolant circulation
• Prevent leaks and pressure loss within the system

Why Replace Your Heater Hose

Over time, coolant hoses can degrade due to heat cycles and ageing.

Common issues include:

• Cracking or hardening of rubber
• Coolant leaks
• Reduced heating efficiency
• Risk of hose failure under pressure

Replacing the hose restores system reliability and prevents costly damage.

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92857456703

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Heater Valve Connecting Hose – Coolant System Hose 

High-quality replacement heater valve connecting hose designed for Porsche 928 models from 1985 to 1995.

This hose connects the heater valve within the cooling system, allowing proper coolant flow to the heater matrix. It plays a critical role in maintaining effective cabin heating and overall cooling system performance.

Fits:

• Porsche 928S2 4.7L 1985-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

Diagram ref no 4

Manufactured to OEM specifications, this hose ensures precise fitment, durability, and resistance to heat and pressure—ideal for maintenance, repair, or restoration of your Porsche 928.

Key Features

• Direct replacement heater valve connecting hose
• Suitable for Porsche 928 (1985–1995)
• Ensures correct coolant flow to heater system
• OEM-style fit and performance
• Heat- and pressure-resistant construction
• Ideal for cooling and heating system maintenance

Function and Purpose

This hose forms part of the vehicle’s cooling and heating system.

It helps to:

• Transfer coolant to and from the heater valve
• Support efficient cabin heating performance
• Maintain proper coolant circulation
• Prevent leaks and pressure loss within the system

Why Replace Your Heater Hose

Over time, coolant hoses can degrade due to heat cycles and ageing.

Common issues include:

• Cracking or hardening of rubber
• Coolant leaks
• Reduced heating efficiency
• Risk of hose failure under pressure

Replacing the hose restores system reliability and prevents costly damage.

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92857456703

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Coolant / Heater pipe, for Left Hand Drive only
The Genuine Porsche 92857410603 coolant / heater pipe is an OE cooling and heater system pipe for Left Hand Drive Porsche 928 1978–1995 models. It helps route coolant through the heater circuit, supporting correct cabin heater operation and cooling system function. Ideal for replacing a leaking, corroded or damaged original pipe while maintaining Genuine Porsche fitment and quality.

Fits:
for LHD (Left hand drive) cars only 
Porsche 928 1978 - 1995

Diagram ref no 5

This part is specifically for Left Hand Drive (LHD) Porsche 928 applications.

What This Part Does / Functions
•  Routes coolant through the heater circuit
•  Connects part of the engine cooling system to the cabin heater system
•  Supports correct coolant flow for heater operation
•  Helps maintain proper engine cooling system circulation
•  Replaces a corroded, damaged, leaking or blocked original pipe
•  Helps prevent coolant loss from the heater pipe area
•  Provides correct Genuine Porsche fitment for LHD vehicles
•  Maintains the factory coolant and heater pipe layout.

Why Replace This Part?
Coolant and heater pipes are exposed to coolant, heat cycles, pressure, corrosion, vibration and age-related deterioration. Over time, the original pipe may corrode, weaken, leak or become restricted. A leaking heater pipe can cause coolant loss, overheating risk, heater performance issues and coolant smell around the vehicle. Replacing it with a Genuine Porsche coolant / heater pipe helps restore the correct factory coolant routing and reliable heater system operation.

Common Symptoms of a Faulty Coolant / Heater Pipe
•   Coolant leak from the heater pipe area
•   Low coolant level warning or regular coolant top-ups
•   Sweet coolant smell from the engine bay or cabin area
•   Reduced cabin heater performance
•   Visible corrosion or damage on the pipe
•   Coolant residue around pipe connections
•   Overheating caused by coolant loss
•   Pipe damage found during cooling system inspection.

When to Replace
•   This Part If the original pipe is leaking, corroded or damaged
•   During heater hose or heater valve replacement
•   During cooling system overhaul
•   If coolant loss is traced to the heater pipe circuit
•   When restoring the heater system on a Porsche 928
•   If the pipe has become blocked or restricted
•   During engine bay restoration
•   When replacing aged cooling system components with Genuine Porsche parts.

Where It Fits on the Car
This pipe fits within the coolant / heater circuit on Left Hand Drive Porsche 928 models. It forms part of the coolant routing between the engine cooling system and cabin heater system.

Correct installation is important to prevent coolant leaks, maintain heater operation and preserve the original Porsche 928 cooling system layout.

Related reference numbers
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92857410603

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Coolant / Heater pipe, for Left Hand Drive only
The Genuine Porsche 92857410603 coolant / heater pipe is an OE cooling and heater system pipe for Left Hand Drive Porsche 928 1978–1995 models. It helps route coolant through the heater circuit, supporting correct cabin heater operation and cooling system function. Ideal for replacing a leaking, corroded or damaged original pipe while maintaining Genuine Porsche fitment and quality.

Fits:
for LHD (Left hand drive) cars only 
Porsche 928 1978 - 1995

Diagram ref no 5

The coolant / heater pipe carries engine coolant through the heater circuit, allowing hot coolant to flow to the heater system for cabin heating and demisting. A correctly fitted pipe helps maintain coolant flow, system pressure, and heating performance while preventing leaks from aged or corroded pipework.

Functions
•  Replaces the coolant / heater pipe
•  Designed for Left Hand Drive vehicles
•  Routes coolant through the heater circuit
•  Supports cabin heater and demister operation
•  Helps maintain cooling system pressure and circulation
•  Helps prevent coolant leaks from worn or corroded pipework
•  Suitable for heater system service, coolant leak repair, or restoration
•  OE Match replacement for Porsche 928 heating and cooling system maintenance.

Why Replace This Part?
Coolant and heater pipes can corrode, crack, block, leak, or become damaged due to age, coolant exposure, heat cycles, pressure, and long-term use. A worn pipe may cause coolant loss, poor heater performance, coolant smell, dampness, pressure loss, or overheating symptoms. Replacing the pipe helps restore reliable coolant flow and heater system operation.

When to Replace This Part
•  Coolant leak is visible from the heater pipe area
•  Pipe is corroded, cracked, damaged, or blocked
•  Heater output is poor or inconsistent
•  Coolant smell or residue is present
•  Cooling system pressure loss is detected
•  Heater system or cooling system service is being carried out
•  Vehicle is undergoing Porsche 928 restoration or preventive maintenance

Where it fits on the car
This pipe fits within the coolant / heater circuit on Left Hand Drive Porsche 928 models. It forms part of the coolant routing between the engine cooling system and the cabin heater system.

Related reference numbers
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92857410603

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Vacuum Hose Distribution Y-Piece – 4mm Vacuum Line Splitter 
Sold each - used in various locations

High-quality vacuum hose distribution Y-piece designed for a wide range of Porsche models including 911, 964, 924S, 944, 968, and 928.

This Y-splitter allows a single vacuum source to be divided into two outlets, enabling efficient routing and connection of vacuum lines within the engine bay or HVAC system. It is specifically designed for vacuum hoses with a 4mm outer diameter, ensuring a secure and precise fit.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• 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 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• 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 928S2 4.7L 1984-86

Diagram ref no 4

Manufactured to OEM standards, this connector is ideal for maintaining or restoring vacuum system integrity across multiple Porsche applications.

Key Features

• Universal-style vacuum Y-piece connector
• Suitable for Porsche 911, 964, 924S, 944, 968, and 928
• Designed for 4mm outer diameter vacuum hoses
• Enables splitting of vacuum lines
• OEM-style fit and function
• Durable construction for long-term reliability

Function and Purpose

This Y-piece is a critical connector within the vacuum system.

It helps to:

• Split a single vacuum line into two outputs
• Maintain proper vacuum routing
• Ensure consistent vacuum pressure distribution
• Support engine and HVAC system operation

Why Replace Your Vacuum Connector

Over time, vacuum connectors can degrade due to heat and age.

Common issues include:

• Cracked or brittle plastic
• Vacuum leaks
• Poor hose connections
• Engine or HVAC system malfunctions

Replacing the Y-piece restores proper vacuum system function.

• Loose or unsecured temperature sensor
• Incorrect temperature readings
• HVAC system inconsistencies
• Broken or missing connector clips

Replacing the lock piece restores proper sensor stability and function.

Related reference numbers
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92857372702

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Vacuum Hose Distribution Y-Piece – 4mm Vacuum Line Splitter 
Sold each - used in various locations

High-quality vacuum hose distribution Y-piece designed for a wide range of Porsche models including 911, 964, 924S, 944, 968, and 928.

This Y-splitter allows a single vacuum source to be divided into two outlets, enabling efficient routing and connection of vacuum lines within the engine bay or HVAC system. It is specifically designed for vacuum hoses with a 4mm outer diameter, ensuring a secure and precise fit.

Fits:

• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• 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 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• 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 928S2 4.7L 1984-86

Diagram ref no 4

Manufactured to OEM standards, this connector is ideal for maintaining or restoring vacuum system integrity across multiple Porsche applications.

Key Features

• Universal-style vacuum Y-piece connector
• Suitable for Porsche 911, 964, 924S, 944, 968, and 928
• Designed for 4mm outer diameter vacuum hoses
• Enables splitting of vacuum lines
• OEM-style fit and function
• Durable construction for long-term reliability

Function and Purpose

This Y-piece is a critical connector within the vacuum system.

It helps to:

• Split a single vacuum line into two outputs
• Maintain proper vacuum routing
• Ensure consistent vacuum pressure distribution
• Support engine and HVAC system operation

Why Replace Your Vacuum Connector

Over time, vacuum connectors can degrade due to heat and age.

Common issues include:

• Cracked or brittle plastic
• Vacuum leaks
• Poor hose connections
• Engine or HVAC system malfunctions

Replacing the Y-piece restores proper vacuum system function.

• Loose or unsecured temperature sensor
• Incorrect temperature readings
• HVAC system inconsistencies
• Broken or missing connector clips

Replacing the lock piece restores proper sensor stability and function.

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

92857372702

The product you are viewing cross references to these numbers

Heater hose feed RHD (Right Hand Drive)



Fits:
Porsche 928 - 1978 to 1995

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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92757458703

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Hose - connects the heater valve to the engine block outlet. 

Fits:
Porsche 928 1978-84

Diagram ref. 4.

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92857456704

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