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Porsche > 911 & 912 (1965-1989) > 911 1974-1977 2.7L / 1976-77 3.0 Carrera > Engine Rebuild Parts > Fuel System Parts >

Fuel Lines & Breather Hoses

Fuel Lines & Breather Hoses

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DISPLAYING 49 to 57 (of 57 products)
1 2 3 4
Hose 4,4 x 9,5mm Sold by the Meter. Porsche 911 / 928 / 928S / 928 S2 - 99918116750
1
Hose 4,4 x 9,5mm Sold by the Meter. Porsche 911 / 928 / 928S / 928 S2
Special Order item
99918116750
Product Information
Product Information

Hose - 4.5 x 9.5mm 
Sold per meter

High-quality 4.5x9.5mm hose designed for a variety of applications across Porsche 911 and 928 models, supplied per metre for precise installation and flexible routing.

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
  • Porsche 911 1984-1986 3.2L
  • Porsche 911 1987-1989 3.2L G50
  • Porsche 911 1978-1989 3.3L Turbo (930)
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86

This versatile hose can be used in multiple systems including vacuum lines, fuel system connections, and air hoses, making it an essential component for maintaining proper engine operation and system efficiency.

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

Key Features

• 4.5mm internal diameter, 9.5mm outer diameter
• Suitable for Porsche 911 and 928
• Multi-purpose hose for vacuum, fuel, and air systems
• 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 used across multiple vehicle systems.

It helps to:
• Maintain vacuum pressure in engine systems
• Support fuel delivery between components
• Provide airflow within intake systems
• Ensure leak-free operation across connections
• Support overall engine performance and efficiency

Why Replace Hoses

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

Common issues include:
• Cracking or splitting
• Fuel or vacuum leaks
• Hardening and reduced flexibility
• Reduced system efficiency

Replacing worn hoses ensures safe operation and reliable performance.

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Related, superseded, cross reference or alternative numbers for comparison.

99918116750
99918116750

The product you are viewing cross references to these numbers
Hose 4,4 x 9,5mm Sold by the Meter. Porsche 911 / 928 / 928S / 928 S2 - 99918116750 - PSU45
1
Hose 4,4 x 9,5mm Sold by the Meter. Porsche 911 / 928 / 928S / 928 S2
99918116750/1
Product Information
Product Information

Hose - 4.5 x 9.5mm 
Sold per meter

High-quality 4.5x9.5mm hose designed for a variety of applications across Porsche 911 and 928 models, supplied per metre for precise installation and flexible routing.

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
  • Porsche 911 1984-1986 3.2L
  • Porsche 911 1987-1989 3.2L G50
  • Porsche 911 1978-1989 3.3L Turbo (930)
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86

This versatile hose can be used in multiple systems including vacuum lines, fuel system connections, and air hoses, making it an essential component for maintaining proper engine operation and system efficiency.

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

Key Features

• 4.5mm internal diameter, 9.5mm outer diameter
• Suitable for Porsche 911 and 928
• Multi-purpose hose for vacuum, fuel, and air systems
• 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 used across multiple vehicle systems.

It helps to:
• Maintain vacuum pressure in engine systems
• Support fuel delivery between components
• Provide airflow within intake systems
• Ensure leak-free operation across connections
• Support overall engine performance and efficiency

Why Replace Hoses

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

Common issues include:
• Cracking or splitting
• Fuel or vacuum leaks
• Hardening and reduced flexibility
• Reduced system efficiency

Replacing worn hoses ensures safe operation and reliable performance.

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

99918116750
99918116750

The product you are viewing cross references to these numbers
Hose clip fuel and air hose. Porsche 911 / 964 / 993 / 914 / 924 / 944 / 968 / 928 - PCG0235692, N 0235692, N0235692
3
Hose clip fuel and air hose. Porsche 911 / 964 / 993 / 914 / 924 / 944 / 968 / 928
Special Order item
PCG0235692
Product Information
Product Information
Hose clip fuel nd air hose. 

porsche

Fits:
Porsche 911 - 1974 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 914 - 1970 to 1976
Porsche 924 - 1980 to 1985
Porsche 944 - 1982 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 - 1978 to 1995

Click 'Zoom in' for large parts diagram.
Diagram ref no 29



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

PCG0235692
PCG0235692
N 0235692
N0235692

The product you are viewing cross references to these numbers
Hose clip fuel pipe 17x9. Porsche 911 / 964 / 993 / 924 / 944 - PCG51219802, 99951219802
3
Hose clip fuel pipe 17x9. Porsche 911 / 964 / 993 / 924 / 944
Special Order item
PCG51219802
Product Information
Product Information
Hose clip fuel pipe - 17x9mm
Sold each

porsche

Fits:
Porsche 911 - 1974 to 1983
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1997
Porsche 924 - 1980 to 1985
Porsche 944 - 1982 to 1985
Porsche 968 - 1992 to 1995

Click 'Zoom in' for large parts diagram.
Diagram ref no 6


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

PCG51219802
PCG51219802
99951219802

The product you are viewing cross references to these numbers
Pre-heat Hose MFI Fuel Pump. Porsche 911 1969-76 MFI - 00004320521
2
Pre-heat Hose MFI Fuel Pump. Porsche 911 1969-76 MFI
Special Order item
00004320521
Product Information
Product Information

MFI Pump Pre-Heat Hose - 25 x 440mm 

High-quality pre-heat hose with 25x440mm dimensions, designed for Porsche models equipped with Mechanical Fuel Injection (MFI) systems.

This hose connects the pre-heating circuit to the MFI pump, ensuring proper temperature regulation of the intake air and fuel system. Maintaining correct operating temperature is critical for smooth engine running, especially during cold starts and warm-up phases.

Fits:

  • Porsche 911 1969-1973 2.2L / 2.4L / 2.7L RS LWB (F)
  • Porsche 911 1974-1976 2.7L Carrera

Diagram ref no 39  

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

Key Features

• 25mm diameter, 440mm length pre-heat hose
• Suitable for Porsche MFI (Mechanical Fuel Injection) systems
• Part number 00004320521
• Designed for intake pre-heating circuits
• Supports proper engine warm-up operation
• Resistant to heat and engine bay conditions
• OEM-style fit and performance

Function and Purpose

This hose is an essential part of the MFI system.

It helps to:
• Deliver warm air to the MFI pump system
• Regulate intake and fuel system temperature
• Improve cold start performance
• Maintain stable engine running during warm-up
• Support efficient fuel injection operation

Why Replace Pre-Heat Hoses

Over time, pre-heat hoses degrade due to heat exposure.

Common issues include:
• Cracking or splitting
• Air leaks reducing system efficiency
• Hardening and reduced flexibility
• Poor cold start and warm-up performance

Replacing worn hoses ensures proper system operation and engine reliability.



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

00004320521
00004320521

The product you are viewing cross references to these numbers
Pre-heat Hose MFI Fuel Pump. Porsche 911 1969-76 MFI - 00004320521 - PSU25-440
3
Pre-heat Hose MFI Fuel Pump. Porsche 911 1969-76 MFI
00004320521/1
Product Information
Product Information

MFI Pump Pre-Heat Hose - 25 x 440mm 

High-quality pre-heat hose with 25x440mm dimensions, designed for Porsche models equipped with Mechanical Fuel Injection (MFI) systems.

This hose connects the pre-heating circuit to the MFI pump, ensuring proper temperature regulation of the intake air and fuel system. Maintaining correct operating temperature is critical for smooth engine running, especially during cold starts and warm-up phases.

Fits:

  • Porsche 911 1969-1973 2.2L / 2.4L / 2.7L RS LWB (F)
  • Porsche 911 1974-1976 2.7L Carrera

Diagram ref no 39  

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

Key Features

• 25mm diameter, 440mm length pre-heat hose
• Suitable for Porsche MFI (Mechanical Fuel Injection) systems
• Part number 00004320521
• Designed for intake pre-heating circuits
• Supports proper engine warm-up operation
• Resistant to heat and engine bay conditions
• OEM-style fit and performance

Function and Purpose

This hose is an essential part of the MFI system.

It helps to:
• Deliver warm air to the MFI pump system
• Regulate intake and fuel system temperature
• Improve cold start performance
• Maintain stable engine running during warm-up
• Support efficient fuel injection operation

Why Replace Pre-Heat Hoses

Over time, pre-heat hoses degrade due to heat exposure.

Common issues include:
• Cracking or splitting
• Air leaks reducing system efficiency
• Hardening and reduced flexibility
• Poor cold start and warm-up performance

Replacing worn hoses ensures proper system operation and engine reliability.



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

00004320521
00004320521

The product you are viewing cross references to these numbers
Protective sheath covering. Porsche 911
3
Protective sheath covering. Porsche 911
Special Order item
99961301740
Product Information
Product Information
Protective sheath covering. 

porsche

Fits:

Porsche 911 / 912 - 1965 to 1989
Porsche 914

Protective sheathing cover for fuel ventilation lines and wiring harness

Click 'Zoom in' for large parts diagram.
Diagram ref no 42

Rubber cap bleed nipple. Porsche 356 / 911 / 964 / 993 / 928 / 944 - 90135192712, 90135192710, 69535152500, 99970337240
4
Rubber cap bleed nipple. Porsche 356 / 911 / 964 / 993 / 928 / 944
Special Order item
90135192712
Product Information
Product Information
Hose clip fuel line A9 x 18
Bleed nipple cap for brake caliper and clutch slave cylinder

porsche

Fits:
Porsche 356B
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 944 - 1982 to 1989
Porsche 928 - 1978 to 1990

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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

90135192712
90135192712
90135192710
69535152500
99970337240

The product you are viewing cross references to these numbers
Tapping screw B4,8 x 13 Porsche 911 / 964 / 993 / 928 - 90038400601, 90018710402, 90018710401
3
Tapping screw B4,8 x 13 Porsche 911 / 964 / 993 / 928
Special Order item
90038400601
Product Information
Product Information
Tapping screw B4,8 x 13 - Multiple applications

porsche

Fits:
Porsche 911 - 1970 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1997
Porsche 928 - 1983 to 1995



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

90038400601
90038400601
90018710402
90018710401

The product you are viewing cross references to these numbers
DISPLAYING 49 to 57 (of 57 products)
1 2 3 4
Also found on these pages
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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