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Fuel Lines & Breather Hoses

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DISPLAYING 1 to 16 (of 23 products)
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91111089900
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Fuel Banjo Bolt  – K & L Jetronic Fuel System Connection
Sold each

High-quality fuel banjo bolt designed for Porsche models equipped with K-Jetronic and L-Jetronic fuel injection systems.

Fits:

  • Porsche 911 1972-73 2.4L T-K
  • Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
  • Porsche 911 1978-1983 3.0L / SC
  • 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
  • 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 944 Turbo 2.5L 8V 1985-88
  • Porsche 944 Turbo 2.5L 8V 1989-91
  • Porsche 944 Turbo S 2.5L 8V 1988
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86

Diagram ref no 52

This essential fastening component is used to securely connect fuel lines to key parts of the fuel system, including the injection pump, fuel injectors (injection valves), and fuel pump. It ensures proper sealing and reliable fuel delivery across multiple connection points within the system.

Depending on the specific Porsche model and configuration, varying quantities of banjo bolts may be required for hose swivel connections. This component is also commonly supplied as part of a complete fitting set.

Important: This banjo bolt is not suitable for vehicles equipped with LH-Jetronic systems.

Key Features

• Fuel banjo bolt for K-Jetronic and L-Jetronic systems
• Suitable for multiple fuel system connection points
• Connects fuel lines to pump, injectors, and injection system
• Ensures secure, leak-free sealing
• OEM-style fit and specification
• Durable construction for long-term reliability

Function and Purpose

This banjo bolt is a critical fastening component within the fuel injection system.

It helps to:
• Secure fuel line connections across the system
• Maintain correct fuel pressure and flow
• Ensure leak-free sealing at connection points
• Support reliable fuel delivery to engine components
• Enable safe and efficient fuel system operation

Why Replace Banjo Bolts

Over time, banjo bolts can wear or become compromised.

Common issues include:
• Fuel leaks at connection points
• Thread wear or damage
• Corrosion from fuel exposure
• Reduced sealing efficiency

Replacing worn bolts ensures safe operation and maintains proper fuel system performance.

Vehicle Compatibility

Suitable for:
• Porsche models equipped with K-Jetronic fuel injection
• Porsche models equipped with L-Jetronic fuel injection

Not suitable for:
• Porsche models with LH-Jetronic systems



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

91111089900
91111089900

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91111089900/1
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Product Information

Fuel Banjo Bolt  – K & L Jetronic Fuel System Connection
Sold each

High-quality fuel banjo bolt designed for Porsche models equipped with K-Jetronic and L-Jetronic fuel injection systems.

Fits:

  • Porsche 911 1972-73 2.4L T-K
  • Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
  • Porsche 911 1978-1983 3.0L / SC
  • 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
  • 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 944 Turbo 2.5L 8V 1985-88
  • Porsche 944 Turbo 2.5L 8V 1989-91
  • Porsche 944 Turbo S 2.5L 8V 1988
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86

Diagram ref no 12

This essential fastening component is used to securely connect fuel lines to key parts of the fuel system, including the injection pump, fuel injectors (injection valves), and fuel pump. It ensures proper sealing and reliable fuel delivery across multiple connection points within the system.

Depending on the specific Porsche model and configuration, varying quantities of banjo bolts may be required for hose swivel connections. This component is also commonly supplied as part of a complete fitting set.

Important: This banjo bolt is not suitable for vehicles equipped with LH-Jetronic systems.

Key Features

• Fuel banjo bolt for K-Jetronic and L-Jetronic systems
• Suitable for multiple fuel system connection points
• Connects fuel lines to pump, injectors, and injection system
• Ensures secure, leak-free sealing
• OEM-style fit and specification
• Durable construction for long-term reliability

Function and Purpose

This banjo bolt is a critical fastening component within the fuel injection system.

It helps to:
• Secure fuel line connections across the system
• Maintain correct fuel pressure and flow
• Ensure leak-free sealing at connection points
• Support reliable fuel delivery to engine components
• Enable safe and efficient fuel system operation

Why Replace Banjo Bolts

Over time, banjo bolts can wear or become compromised.

Common issues include:
• Fuel leaks at connection points
• Thread wear or damage
• Corrosion from fuel exposure
• Reduced sealing efficiency

Replacing worn bolts ensures safe operation and maintains proper fuel system performance.

Vehicle Compatibility

Suitable for:
• Porsche models equipped with K-Jetronic fuel injection
• Porsche models equipped with L-Jetronic fuel injection

Not suitable for:
• Porsche models with LH-Jetronic systems



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91111089900
91111089900

The product you are viewing cross references to these numbers
N0203621/1
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Product Information

12 x 17mm Braided Fuel Tank Breather Hose – Fuel Tank Ventilation
Sold per metre

High-quality 12 x 17mm braided fuel tank breather hose designed for use in fuel tank ventilation systems across a wide range of vehicles.

This hose is specifically engineered to safely transport fuel vapours, maintaining proper tank ventilation and preventing pressure build-up within the fuel system. The braided outer layer provides added durability and protection while retaining flexibility for easy routing.

Fits:

  • 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 924 2.0L 1980-85
  • Porsche 924 Turbo 2.0L 1982-84
  • Porsche 924 Carrera GTS 2.0L 1982
  • 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

Diagram ref no 39

Sold per metre, this hose allows for precise length requirements, making it ideal for maintenance, repair, or restoration of fuel tank breather and ventilation systems.

Key Features

• 12mm internal diameter, 17mm outer diameter
• Braided outer layer for durability and protection
• Designed for fuel tank breather and ventilation systems
• Suitable for fuel vapour transport
• Sold per metre for custom length applications
• Flexible and easy to install
• OEM-style appearance and performance

Function and Purpose

This breather hose is an essential component of the fuel system.

It helps to:
• Vent fuel vapours safely from the tank
• Prevent pressure build-up within the fuel system
• Maintain correct tank ventilation
• Support efficient fuel system operation
• Reduce risk of fuel odours and vapour leaks

Why Replace Breather Hoses

Over time, breather hoses can degrade due to fuel vapours and heat.

Common issues include:
• Cracking or splitting
• Hardening and reduced flexibility
• Fuel vapour leaks
• Blocked or restricted airflow

Replacing worn hoses ensures proper ventilation and safe system operation.



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

N0203621
N0203621
N 0203621

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PCG020359A/1
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Product Information

Braided Fuel Hose (Sold by the Metre) - 9.3mm Internal Diameter / 15.3mm Outer Diameter. 

This high-quality braided fuel hose is designed for multiple uses within the fuel system of various vehicles. It offers extremely low fuel permeability, excellent heat resistance, and high flexibility, making it a reliable choice for demanding applications.

Fits:
Porsche 911 Carrera 1965-89
Porsche 911 Turbo (930) 1975-89 
Porsche 914 1970-76
Porsche 924 1976-85
Porsche 928 1978-91

Comparable to Porsche part number(s): N0203591 & PCG020359A

Specifications:

Inner Diameter (ID): 9.3mm
Outer Diameter (OD): 15.3mm 
Material: 
FPM/ECO/AR/ECO (Type 3E) – Compliant with DIN 73379-1
Complies With: EU End-of-Life Vehicles Directive

NOTE: This product is not suitable for use in fuel tanks, or for gear and/or engine oils. Always follow the manufacturer's specifications regarding operating temperatures, especially for high-performance engines exposed to extreme heat.



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PCG020359A
N0203591
PCG020359A

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Special Order item
90007001003
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Product Information
Domed cap nut M10 x 1,25 fuel pump pressure line. 

porsche

Fits:
Porsche 911 - 1977 to 1983

Click 'Zoom in' for large parts diagram.
Diagram ref no 35a



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90007001003
90007001003
90007001002

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99918116850
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Fuel Hose 12 x 19mm
Sold per metre

High-quality fuel hose designed for use across a wide range of Porsche fuel system applications, supplied per metre for maximum flexibility and precise fitment.

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 944S2 3.0L 16V 1989-91
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86
  • Porsche 928S4 5.0L 1987-92
  • Porsche 928GT 5.0L 1989-91
  • Porsche 928GTS 5.4L 1992-95

This hose is engineered to ensure safe and consistent fuel delivery between system components such as fuel tanks, pumps, filters, and injectors. Built to withstand fuel exposure, pressure, and engine bay temperatures, it provides reliable long-term performance.

Sold per metre, this hose allows you to cut the exact length required, making it ideal for maintenance, repair, or restoration projects. Manufactured to OEM standards for durability and correct specification.

Key Features

• Fuel hose suitable for various Porsche applications
• Part number 99918116850
• Sold per metre for custom length requirements
• Designed for fuel system use
• Resistant to fuel and heat exposure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This fuel hose is an essential component of the fuel system.

It helps to:
• Transport fuel safely between components
• Maintain consistent fuel flow and pressure
• Ensure leak-free operation
• Support efficient engine performance
• Enable reliable fuel delivery under load

Why Replace Fuel Hoses

Over time, fuel hoses degrade due to exposure to heat and fuel.

Common issues include:
• Cracking or splitting
• Fuel leaks and safety risks
• Hardening and reduced flexibility
• Reduced fuel delivery efficiency

Replacing worn hoses ensures safe operation and restores optimal fuel system performance.



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

99918116850
99918116850

The product you are viewing cross references to these numbers
99918116850/1
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Product Information

Fuel Hose 12 x 19mm
Sold per metre

High-quality fuel hose designed for use across a wide range of Porsche fuel system applications, supplied per metre for maximum flexibility and precise fitment.

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 944S2 3.0L 16V 1989-91
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86
  • Porsche 928S4 5.0L 1987-92
  • Porsche 928GT 5.0L 1989-91
  • Porsche 928GTS 5.4L 1992-95

This hose is engineered to ensure safe and consistent fuel delivery between system components such as fuel tanks, pumps, filters, and injectors. Built to withstand fuel exposure, pressure, and engine bay temperatures, it provides reliable long-term performance.

Sold per metre, this hose allows you to cut the exact length required, making it ideal for maintenance, repair, or restoration projects. Manufactured to OEM standards for durability and correct specification.

Key Features

• Fuel hose suitable for various Porsche applications
• Part number 99918116850
• Sold per metre for custom length requirements
• Designed for fuel system use
• Resistant to fuel and heat exposure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This fuel hose is an essential component of the fuel system.

It helps to:
• Transport fuel safely between components
• Maintain consistent fuel flow and pressure
• Ensure leak-free operation
• Support efficient engine performance
• Enable reliable fuel delivery under load

Why Replace Fuel Hoses

Over time, fuel hoses degrade due to exposure to heat and fuel.

Common issues include:
• Cracking or splitting
• Fuel leaks and safety risks
• Hardening and reduced flexibility
• Reduced fuel delivery efficiency

Replacing worn hoses ensures safe operation and restores optimal fuel system performance.



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99918116850
99918116850

The product you are viewing cross references to these numbers
Special Order item
91120117102
Product Information
Product Information
Fuel hose connector.

porsche

Fits:
Porsche 911 (1974-1983)
Porsche 930 Turbo (1975-1977)

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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91120117102
91120117102

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91120117102/1
Product Information
Product Information
Fuel hose connector.

oematch

Fits:
Porsche 911 (1974-1983)
Porsche 930 Turbo (1975-1977)

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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91120117102
911.201.171.02
91120117102

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93011030303/1
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Product Information

Fuel Feed Hose – Metering Head Line 

High-quality replacement fuel feed hose designed for Porsche 911 turbo (930) and 964 turbo models, connecting directly to the fuel metering head within the K-Jetronic system

This hose plays a crucial role in feeding  fuel to the metering head, ensuring proper pressure regulation and stable fuel delivery. Correct operation is essential for maintaining optimal engine performance, smooth running, and consistent fuel system behaviour in turbocharged applications.

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 11

Manufactured to OEM specifications, this fuel feed hose ensures precise fitment along with excellent resistance to fuel, heat, and pressure—making it ideal for maintenance, repair, or restoration of Porsche turbo fuel systems.

Key Features

• Direct replacement fuel feed hose to the metering head
• Suitable for Porsche 911 turbo (930) & 964 turbo
• Designed for K-Jetronic fuel injection systems
• Maintains correct fuel pressure and circulation
• Resistant to fuel, heat, and high pressure
• OEM-style fit and performance

Function and Purpose

This hose is a vital component of the K-Jetronic fuel system.

It helps to:

• Supply fuel to the metering head
• Maintain stable fuel pressure within the system
• Support accurate fuel metering and distribution
• Ensure consistent engine performance

Why Replace Your Fuel Supply Hose

Fuel hoses in K-Jetronic systems are exposed to high pressure and temperature.

Common issues include:

• Cracking or degradation of hose material
• Fuel leaks under pressure
• Irregular fuel pressure behaviour
• Poor engine performance or drivability

Replacing the hose restores safe and reliable fuel system operation.



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93011030303
93011030302
93011030301
93011030303

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93011030303
Product Information
Product Information
Fuel line, feed.

Fits:
Porsche 911 3.0L Turbo 1975-77
Porsche 911 3.3L Turbo 1978-89
Porsche 964 3.3L / 3.6L Turbo 1990-94

Diagram ref no 11

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93011030303
93011030302
93011030301
93011030303

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93035606804
Product Information
Product Information
Fuel Line. Connects to Fuel Pump


porsche

Fits:
Porsche 911 (930) Turbo 1975-89

Click picture for large parts diagram.
Diagram Ref No 14.



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93035606804
93035606802
93035606804

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91135606613
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Product Information
Fuel pressure line.

porsche

Fits:
Porsche 911 2.7 1974-77
Porsche 911 2.7S 1974-75
Porsche 911 3.0 Carrera 1976-77
Porsche 930 Turbo 3.0L 75-76

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91135606613
91135606603
91135606613

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91135606612
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Fuel Tank Pressure Line

porsche

Fits:
Porsche 911 SC 1977-79
Porsche 911 Turbo 3.0L 1977
Porsche 911 Turbo 3.3L 1978-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 38

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91135606612
91135606607
91135606612

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91135606213
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Product Information
Fuel Tank Return Line

porsche

Fits:
Porsche 911/911S / Carrera 3.0L 1974-77
Porsche 911 SC 1978-79

Porsche 911 (930) TURBO 1975-77
Porsche 911 (930) TURBO 1978-89

Click 'Zoom in' for large parts diagram.
Diagram ref no 38

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91135606213
91135606207
91135606213
91135606214

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91135620203
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Product Information
Grommet fuel line. 


porsche

Fits:
Porsche 911 - 1974 to 1989

Click 'Zoom in' for large parts diagram.
Diagram ref no 41



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91135620203
91135620203

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DISPLAYING 1 to 16 (of 23 products)
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About Fuel Lines & Breather Hoses

Fuel Lines & Breather Hoses – Reliable Fuel Flow and Ventilation for Porsche Engines

Fuel lines and breather hoses are essential for maintaining safe, consistent, and efficient operation of your Porsche’s fuel and vapour management systems. The fuel lines transport petrol from the tank to the engine, while breather hoses manage pressure and vapour circulation within the fuel system, ensuring smooth refuelling and balanced performance.

At Design911, we supply a complete range of fuel lines, connectors, and breather hoses designed for long-lasting performance, accurate fitment, and durability under high-pressure and high-temperature conditions. Built from fuel-resistant rubber, reinforced composites, or stainless steel, each component ensures secure sealing, corrosion resistance, and reliable fuel delivery for both classic and modern Porsche vehicles.

Whether you’re servicing a classic 911, restoring a transaxle Porsche, or maintaining a performance 992, our manufacturer-quality components guarantee safe, efficient, and leak-free operation.

What Do Fuel Lines and Breather Hoses Do?

Fuel lines and breather hoses play crucial roles in maintaining a balanced and efficient fuel system.

Core Functions:

  • Fuel Lines: Safely transport pressurised fuel from the tank to the injectors or carburetors.
  • Breather Hoses: Equalise air pressure within the tank and prevent vapour lock or vacuum formation.
  • Vapour Management: Direct excess vapours back into the intake or carbon canister for emissions control.
  • System Integrity: Maintain proper sealing to avoid leaks, fumes, and performance loss.

A reliable fuel line and breather hose system is essential for optimal fuel delivery, safety, and emissions control.

Why Do Fuel Lines and Breather Hoses Fail?

Over time, these components are exposed to heat, vibration, and corrosive fuels, causing them to deteriorate.

Common Causes of Failure Include:

  • Cracking, hardening, or swelling due to ethanol-based fuels.
  • Internal corrosion or blockage from fuel contamination.
  • Age-related brittleness in rubber or plastic hoses.
  • Loose or leaking fittings reducing system pressure.       
  • External damage from abrasion or heat exposure.

When these parts fail, you may notice fuel odours, leaks, poor idling, or difficulty refuelling — all signs your Porsche’s fuel system needs attention.

Why Replace Fuel Lines and Hoses?

Replacing ageing or damaged lines and hoses ensures safe, efficient fuel flow and helps prevent leaks, vapour loss, and performance issues. Our precision-fit fuel lines and breather hoses are engineered to restore reliability while meeting modern material and performance standards.

Key Benefits:
  • Restores proper fuel flow and vapour control.
  • Prevents fuel leaks, odours, and emissions faults.
  • Improves safety and engine performance.
  • Constructed from modern, fuel-resistant materials.
  • Direct-fit installation for Porsche models across all generations.
  • Ideal for maintenance, restoration, and upgrades.

Proper maintenance ensures your Porsche’s fuel system remains clean, safe, and efficient — exactly as its performance heritage demands.

Highlights:
  • Comprehensive selection of Porsche fuel lines and breather hoses.
  • Precision-engineered for accurate fit and durability.
  • Resistant to ethanol, heat, and corrosion.
  • Supports stable fuel pressure and emissions control.
  • Compatible with classic and modern Porsche models.
  • Ideal for rebuilds, performance tuning, and preventive maintenance.

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