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Fuel Lines & Breather Hoses
Porsche 944 / 924S High-Pressure Fuel Hose XL – Safety Upgrade
Prevent Fuel Leaks and Reduce Engine Bay Fire Risk
One of the most common causes of engine bay fires in the
Porsche 944 is failure of the main high-pressure fuel line. Over time, the
original hose ages, hardens and develops cracks. When this line leaks, fuel can
drip directly onto the hot exhaust manifold, creating a serious fire hazard.
Fits:
- 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
This upgraded XL high-pressure fuel hose is designed to eliminate that risk by improving routing and adding additional heat protection.
What the Main Fuel Hose Does
The main high-pressure fuel hose delivers pressurised fuel from the fuel rail and fuel system to the engine. It operates under constant pressure and high temperatures inside the engine bay.
Its function is critical to:
- Supplying consistent fuel pressure
- Maintaining proper engine performance
- Ensuring safe fuel delivery under load
Because this hose sits near the exhaust system in factory configuration, deterioration can quickly become dangerous.
Why Original Fuel Hoses Fail
Over decades of use, factory fuel hoses commonly suffer
from:
- Age-related rubber cracking
- Heat exposure from the exhaust manifold
- Ethanol content in modern fuels
- Internal degradation under pressure
- Sudden splitting without warning
Fuel leakage can happen unexpectedly and escalate quickly.
Why You Should Upgrade to the XL Version
This XL high-pressure fuel hose has been redesigned for improved safety and longevity.
Key advantages include:
- Extra length to reroute the hose along the top of the bulkhead
- Avoids running directly over the hot exhaust
- Black heat-resistant outer sheath for added protection
- Improved routing reduces stress on fuel rail connections
- Helps prevent cracking at fuel rail fittings
By routing the hose away from the exhaust and securing it along the bulkhead, the risk of fuel contacting high heat components is significantly reduced.
In early models and 924S variants, the extended length allows cleaner routing under the spray piece, improving both appearance and reliability.
A vehicle lift is required for installation.
When You Should Replace Your Fuel Line
You should replace the main fuel hose if:
- The original line has never been replaced
- You notice fuel smell in the engine bay
- The hose shows cracking or brittleness
- You are restoring or maintaining a classic 944 or 924S
- You want preventative fire protection
Eventually, every original hose will require replacement. Upgrading now protects both your vehicle and your investment.
Key Benefits at a Glance
- Direct replacement high-pressure fuel hose
- Extra-long design for safer routing
- Avoids contact with hot exhaust components
- Heat-resistant outer protective sheath
- Suitable for all 944 years and 924S
- Helps prevent fuel rail connection cracking
- Ideal preventative safety upgrade
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
951356XLKIT
The product you are viewing cross references to these numbers
- 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
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Rennline High Pressure Fuel Rail
Upgrade your aging factory fuel system with Rennline’s High
Pressure Fuel Rail Line. Designed to outperform and outlast the
original, this premium replacement features a modern braided fuel line paired
with precision CNC-machined billet aluminum ends, ensuring a secure, leak-free
fit. Unlike other aftermarket options, this rail follows the OEM routing to
prevent interference with the rocker cover. Perfect for stock replacements or
high-performance builds.
Fits:
- 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 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 11
Key Features:
- Modern braided fuel hose for enhanced durability and higher pressure tolerance
- CNC-machined billet ends for an OEM+ look and performance
- Includes 10mm & 8mm to -6 JIC compression fittings
- Ideal for both factory replacement and performance applications
- Delivers high-pressure fuel reliably to the injectors.
- Withstands higher fuel system pressures compared to aging OEM parts.
- Prevents leaks with precision-machined fittings and modern hose construction.
- Maintains factory routing for a clean, interference-free fit.
Symptoms of a Failing or Worn Fuel Rail
- Strong fuel smell from the engine bay.
- Visible leaks or damp spots on the fuel line/rail.
- Hard starting or poor performance under load.
- Fuel pressure loss or misfires.
- Cracked or brittle factory lines due to age.
Common Reasons for Failure
- Aging
Materials: Original rubber fuel lines harden and crack over time.
- Heat
Exposure: Constant engine bay heat accelerates degradation.
- Fuel
Pressure Stress: Stock parts may struggle with modern fuel blends and
higher pressures.
- Corrosion: Factory metal ends may rust or weaken.
Why Replace?
- Prevents dangerous fuel leaks and fire hazards.
- Restores reliable fuel delivery and performance.
- Provides
a long-term solution with modern materials.
- Supports both daily driving and high-performance builds.
- Eliminates common clearance issues with poorly designed aftermarket options.
Ideal For: Porsche 924S, 944, and 951 owners seeking a safe, reliable upgrade to their fuel delivery system - whether for everyday driving or high-performance tuning.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
M141
The product you are viewing cross references to these numbers
- 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 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
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Used to connect fuel tank filter hose to fuel pump
Fits:
Porsche 944 2.5ltr 8v -
Click 'Zoom in' for large parts diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
N0235262
The product you are viewing cross references to these numbers
- Porsche 944 2.5L 8V 1982-87
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Sold each
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
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 1975-1977 3.0L 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 944 2.5L 8V 1982-87
- 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
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Bleed nipple cap for brake caliper and clutch slave cylinder
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
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
- 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 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- 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
- Porsche 356B 1959-63
- Porsche 912E 4CYL 1976
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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.
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