do not press the back button…
Your Vehicle
Porsche // 911 & 912 (1965-1989) // 911 1978-1983 3.0L / SC
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Fuel Lines & Breather Hoses
- 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)
Fits:
Porsche 911 (1974-1983)
Porsche 930 Turbo (1975-1977)
Click 'Zoom in' for large parts diagram.
Diagram ref no 12
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91120117102
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
Fits:
Porsche 911 SC 1980-83
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135608702
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
Fits:
Porsche 911 SC 1980-83
Click 'Zoom in' for large parts diagram.
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135608902
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
Sold each - 3 required per car
Fits:
Porsche 911 2.7ltr / 3.0ltr - 1974 to 1980
Diagram ref no 50
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111009313
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
Sold each - 3 required per car
Fits:
Porsche 911 2.7ltr / 3.0ltr - 1974 to 1980
Diagram ref no 50
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111009313
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
Sold each - 3 required per car
Fits:
Porsche 911 2.7ltr / 3.0ltr - 1974 to 1980
Diagram ref no 50
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111009314
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
Sold each - 3 required per car
Fits:
Porsche 911 2.7ltr / 3.0ltr - 1974 to 1980
Diagram ref no 50
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111009314
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
Fits:
Porsche 911 SC 1981-83
Click 'Zoom in' for large parts diagram.
Diagram ref no 51
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011049402
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
Fuel Line – Mixture Control to Warm-Up Regulator
High-quality replacement fuel line designed for Porsche 911 SC 1978-80 models equipped with Bosch K-Jetronic fuel injection systems.
This line connects the mixture control unit (fuel distributor) to the warm-up regulator (WUR), playing a critical role in regulating control pressure within the fuel system. This pressure directly influences fuel mixture during cold starts and warm-up phases, making this line essential for proper engine behaviour and drivability.
Fits:
- Porsche 911 1978-1980 3.0L / SC
Diagram ref no 51
Manufactured from a high-quality polyamide tube, this fuel line features reinforced polyamide fibres and an additional protective outer sheath, ensuring exceptional durability, pressure resistance, and long-term reliability in demanding engine bay conditions.
Built to OEM specifications, it offers precise fitment and is ideal for maintenance, repair, or full CIS system restoration.
Key Features
• Direct replacement fuel line (mixture control to WUR)
• Suitable for Porsche 911 SC
• Manufactured from high-quality reinforced polyamide
• Polyamide fibre reinforcement for strength
• Additional protective outer sheath
• Designed for precise control pressure delivery
• OEM-style fit and performance
Part of a Complete K-Jetronic Fuel & Control Pressure System
This line operates within the K-Jetronic control pressure circuit, which includes:
• Fuel distributor / mixture control unit
• Warm-up regulator (WUR)
• Fuel pressure lines
• Fuel accumulator
• Injector lines and injectors
Together, these components regulate fuel pressure and mixture, particularly during cold starts and engine warm-up.
Why This Line is Critical
The warm-up regulator relies on accurate pressure signals.
This hose helps to:
• Deliver control pressure from the fuel distributor
• Regulate air-fuel mixture during engine warm-up
• Ensure smooth cold starting and idle stability
• Maintain consistent engine performance
Why Replace K-Jetronic Control Pressure Lines
Over time, original lines can degrade or lose integrity.
Common issues include:
• Cracking or ageing of original materials
• Internal restriction affecting pressure regulation
• Fuel leaks under pressure
• Poor cold start performance or unstable idle
Replacing the line restores correct control pressure behaviour and system reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011050201
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
Fuel Line – Mixture Control to Warm-Up Regulator
High-quality replacement fuel line designed for Porsche 911 SC 1978-80 models equipped with Bosch K-Jetronic fuel injection systems.
This line connects the mixture control unit (fuel distributor) to the warm-up regulator (WUR), playing a critical role in regulating control pressure within the fuel system. This pressure directly influences fuel mixture during cold starts and warm-up phases, making this line essential for proper engine behaviour and drivability.
Fits:
- Porsche 911 1978-1980 3.0L / SC
Diagram ref no 51
Manufactured from a high-quality polyamide tube, this fuel line features reinforced polyamide fibres and an additional protective outer sheath, ensuring exceptional durability, pressure resistance, and long-term reliability in demanding engine bay conditions.
Built to OEM specifications, it offers precise fitment and is ideal for maintenance, repair, or full CIS system restoration.
Key Features
• Direct replacement fuel line (mixture control to WUR)
• Suitable for Porsche 911 SC
• Manufactured from high-quality reinforced polyamide
• Polyamide fibre reinforcement for strength
• Additional protective outer sheath
• Designed for precise control pressure delivery
• OEM-style fit and performance
Part of a Complete K-Jetronic Fuel & Control Pressure System
This line operates within the K-Jetronic control pressure circuit, which includes:
• Fuel distributor / mixture control unit
• Warm-up regulator (WUR)
• Fuel pressure lines
• Fuel accumulator
• Injector lines and injectors
Together, these components regulate fuel pressure and mixture, particularly during cold starts and engine warm-up.
Why This Line is Critical
The warm-up regulator relies on accurate pressure signals.
This hose helps to:
• Deliver control pressure from the fuel distributor
• Regulate air-fuel mixture during engine warm-up
• Ensure smooth cold starting and idle stability
• Maintain consistent engine performance
Why Replace K-Jetronic Control Pressure Lines
Over time, original lines can degrade or lose integrity.
Common issues include:
• Cracking or ageing of original materials
• Internal restriction affecting pressure regulation
• Fuel leaks under pressure
• Poor cold start performance or unstable idle
Replacing the line restores correct control pressure behaviour and system reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011050201
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
This fuel line assembly with integrated warp-up valve connects from the fuel system to the mixer or injection control unit, helping regulate fuel flow during warm-up or transient conditions. It ensures proper fuel delivery, mixture balancing, and smooth engine response, particularly during cold start and transitional throttle operation.
Fits:
Porsche 911 SC 3.0L 1978 - 1980
Diagram ref no 61
Aged or cracked lines can leak fuel, creating serious risks and causing mixture imbalances, rough idle, or hesitation during warm-up. An OE-Match replacement restores proper fuel delivery, ensures smooth cold starts, and maintains stable engine performance. Built to resist heat, vibration, and pressure, it provides lasting reliability and peace of mind by preventing breakdowns and protecting your Porsche from costly damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011051300
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
The Genuine Porsche Fuel Line (Part Number: 93011049501) is an original equipment fuel injection system component designed for selected Porsche 911 SC 3.0L models manufactured between 1981 and 1983.
Fits:
- Porsche 911 1981-1983 3.0L / SC
Diagram Ref No 61
Manufactured to Porsche's original equipment specifications, this fuel line forms part of the Bosch K-Jetronic Continuous Injection System (CIS), which controls the delivery of pressurised petrol to the engine.
The Porsche 911 SC uses a mechanical fuel injection arrangement that depends on accurately controlled fuel pressure, reliable fuel distribution and secure fuel line connections to maintain consistent engine operation.
The fuel line provides a dedicated passage within the injection system, allowing petrol to move between the relevant fuel system components while maintaining the pressure integrity required for correct operation.
Designed for the original Porsche 911 SC fuel injection configuration, the component helps preserve the routing and connection arrangement specified by Porsche.
Over time, original fuel lines can deteriorate due to repeated temperature changes, petrol exposure, engine vibration, corrosion and general ageing. Damaged pipework or weakened connections may allow fuel to escape or interfere with fuel delivery.
A leaking or restricted fuel line can contribute to fuel odours, starting difficulties, hesitation, irregular engine running or reduced performance.
More importantly, petrol escaping within the engine compartment presents a serious fire risk, particularly where fuel may contact hot exhaust or electrical components.
Replacing a damaged or deteriorated fuel line with a Genuine Porsche component helps restore the original fuel circuit, maintain secure fuel containment and protect the reliability of the engine's fuel injection system.
Ideal for Bosch CIS maintenance, fuel leak repairs, engine refurbishment and classic Porsche restoration projects, this Genuine Porsche Fuel Line provides a factory-specified replacement for compatible Porsche 911 SC models.
What This Product Does:
The fuel line is an essential component of the Porsche 911 SC's Bosch K-Jetronic mechanical fuel injection system.
Its primary function is to transport petrol through the appropriate section of the fuel injection circuit while maintaining secure connections and the intended fuel pressure conditions.
Unlike modern electronically pulsed fuel injection systems, Bosch K-Jetronic uses continuous mechanical fuel distribution to supply the engine's injectors.
The fuel system relies on a network of pipes, pressure-control components and injection valves to ensure that fuel reaches the engine in the correct manner.
The fuel line helps maintain an uninterrupted passage through its designated part of this system.
Its main functions include:
- Transporting petrol: Provides the necessary passage for fuel to move between the connected injection system components.
- Maintaining fuel pressure integrity: Helps preserve the sealed fuel circuit required for correct mechanical injection operation.
- Supporting fuel distribution: Forms part of the system responsible for delivering petrol through the engine's injection arrangement.
- Preventing fuel leakage: Correctly fitted pipework and connections help keep petrol contained within the system.
- Supporting reliable engine starting: Helps maintain the fuel supply conditions required during start-up.
- Maintaining smooth engine operation: Supports consistent fuel delivery during idling and normal driving.
- Supporting acceleration: Provides an unrestricted passage for fuel during changing engine operating conditions.
- Maintaining correct factory routing: Follows the original Porsche fuel line arrangement.
- Supporting injection system reliability: Helps preserve the correct operation of the connected fuel injection components.
- Preserving original specifications: Maintains the fuel line configuration intended for the applicable Porsche 911 SC engine.
The fuel line itself does not regulate fuel pressure or independently meter fuel. These functions are performed by the fuel distributor, warm-up regulator and other components within the CIS system.
Symptoms Of Wear Or Failure:
The Porsche 911 SC fuel injection system operates with pressurised petrol, making the condition of its fuel lines particularly important.
On classic vehicles, decades of heat exposure, engine vibration and ageing can contribute to deterioration of fuel-carrying components.
Common symptoms of a worn or damaged fuel line include:
- Strong petrol smell: A damaged pipe or leaking connection may allow petrol vapour to escape into the engine compartment.
- Visible fuel leakage: Petrol may be visible around the pipe, fittings or associated connections.
- Dampness around fuel fittings: Wet or stained areas near the fuel line connections may indicate seepage.
- Difficulty starting the engine: Significant fuel delivery or pressure problems may affect starting performance.
- Extended engine cranking: Pressure loss or restricted fuel delivery may contribute to prolonged starting.
- Rough engine idling: Irregular fuel delivery may affect combustion consistency.
- Engine hesitation: Fuel flow problems may become noticeable during acceleration.
- Poor performance under load: A restricted fuel passage may interfere with the engine's fuel requirements.
- Intermittent engine stalling: Severe fuel supply interruptions may cause the engine to stop unexpectedly.
- Visible pipe corrosion: Corrosion may weaken metal pipework or associated fittings.
- Cracked or deteriorated sections: Ageing materials or mechanical stress may compromise the fuel line.
- Damaged connection fittings: Worn threads, distorted sealing surfaces or loose unions may cause leakage.
- Kinked or crushed pipework: Physical deformation may restrict normal fuel flow.
- Abrasion damage: Incorrect routing or loose mounting hardware may allow the line to rub against surrounding components.
- Fuel system pressure irregularities: Leaks or restrictions may produce abnormal pressure readings during diagnostic testing.
- Visible damage during maintenance: Removal of surrounding engine components may reveal deterioration that was previously difficult to inspect.
Why Replacement Matters:
Replacing a damaged or ageing fuel line is important for maintaining safe and reliable operation of the Porsche 911 SC's mechanical fuel injection system.
A leaking fuel line can allow pressurised petrol to escape into the engine compartment, creating a significant fire hazard.
Even a small leak should be addressed promptly because fuel may reach hot engine or exhaust components.
A restricted fuel line may also interfere with fuel delivery and contribute to starting difficulties, hesitation or poor running.
Installing a Genuine Porsche replacement Fuel Line helps to:
- Restore secure fuel containment: Replace leaking or damaged pipework to help prevent petrol escaping.
- Improve engine compartment safety: Reduce the risk associated with fuel leakage near hot components.
- Maintain fuel pressure integrity: Support the sealed fuel circuit required for Bosch CIS operation.
- Restore reliable fuel delivery: Replace restricted or damaged pipework that interferes with fuel flow.
- Support consistent engine starting: Help maintain the fuel supply conditions required during start-up.
- Improve idle and running quality: Address fuel delivery problems caused by a confirmed defective line.
- Reduce petrol odours: Eliminate fuel smells resulting from a leaking pipe or connection.
- Prevent further deterioration: Replace corroded or mechanically damaged components before complete failure.
- Maintain correct factory fitment: Restore the original Porsche fuel line routing and connection arrangement.
- Protect surrounding components: Reduce unwanted exposure to petrol within the engine compartment.
- Support CIS servicing: Provide replacement pipework during fuel injection system repairs.
- Preserve vehicle originality: Maintain the factory fuel injection arrangement.
- Support classic Porsche restoration: Replace ageing fuel system components during engine refurbishment.
- Maintain Genuine Porsche quality: Use an original equipment component intended for the applicable vehicle.
Replacement is particularly recommended when inspection confirms corrosion, cracking, damaged fittings, fuel seepage or physical deformation.
When carrying out fuel system repairs, other ageing fuel lines, connection fittings and associated sealing components should also be inspected.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011049501
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 1978-1989 3.3L Turbo (930)
Fits:
Porsche 911 1981-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91135609103
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
Fits:
Porsche 911 SC 3.0L (930.10) 1981-83
Click 'Zoom in' for large parts diagram.
Diagram ref no 62
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011049800
The product you are viewing cross references to these numbers
- 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
For Lines with Banjo Connections
with bolts
Fits:
Porsche 911 E/S 2.2-2.4 08/68-07/73
Porsche 911 Carrera 2.7 08/73-07/74
Click 'Zoom in' for large parts diagram.
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135604900
The product you are viewing cross references to these numbers
- 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
8mm pipe / 12mm banjo
Fits:
Porsche 911 1969-75
Click 'Zoom in' for large parts diagram.
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90135604900
The product you are viewing cross references to these numbers
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?
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.
-
Fuel Tank & Parts
-
Fuel Filler Cap / Neck / Flap
-
Fuel Gauge / Level Sender
-
Fuel Filter and Fittings
-
Fuel Pumps
-
Pressure Valves / Sensors / Dampers / Regulators
-
Fuel Accumulator
-
Fuel Expansion Tank
-
Carbon Canister
-
Fuel Injectors
-
Fuel Carry Cans
-
Fuel Injection / Collection Rail
-
Fuel Distributor / Metering Head
