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Your Vehicle // Porsche // 356 (1950-1965) // 356A 1955-59
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Fuel Filler Cap / Neck / Flap
Braided Fuel Hose (Sold by the Metre) - 7.3mm Internal Diameter / 13.5mm 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 356 1950-65
Porsche 911 Carrera 1965-1977
Porsche 912 1967-69
Porsche 914 1970-76
Comparable to Porsche part number(s): 99918003050 & 9991800305A
Specifications:
Inner Diameter (ID): 7.3mm
Outer Diameter (OD): 13.5mm
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9991800305A
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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
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Fits:
Porsche 356 / 356 A/540.1 1950-59
Porsche 356 B-T5 1960-65
Porsche 356 Carrera 2000 GT 1960-65
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64420127900
The product you are viewing cross references to these numbers
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
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12 Month Warranty
Worldwide Delivery
Maintain a secure, leak-free seal for your Porsche's fuel system with this OE Match Fuel Tank Cap Seal, manufactured as a direct replacement. Produced to OE-style specifications, this rubber sealing ring fits between the fuel filler cap and filler neck, helping to prevent fuel vapours, moisture, and contaminants from entering or escaping the fuel tank while ensuring the cap seals correctly.
Fits:
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
Diagram Ref No 4
Over time, the original seal can become hardened, flattened, cracked, or perished through exposure to fuel, heat, and age. A deteriorated seal may reduce the effectiveness of the fuel cap, potentially allowing fuel odours, moisture ingress, or vapour leaks. Replacing the fuel tank cap seal restores the correct sealing performance and helps maintain the integrity of the fuel system. This OE Match component is ideal for routine maintenance, fuel system repairs, and Porsche restoration projects.
What This Product Does:
- Creates a secure seal between the fuel cap and filler neck.
- Helps prevent fuel vapour leaks.
- Reduces the risk of moisture and dirt entering the fuel tank.
- Maintains the correct sealing performance of the fuel filler cap.
- Replaces hardened, cracked, or perished original seals.
- Supports reliable fuel system operation.
- Provides an OE-style fit and dependable quality.
Symptoms Of Wear Or Failure:
- Cracked, split, or perished rubber seal.
- Flattened or compressed sealing surface.
- Fuel odours around the filler cap.
- Fuel cap no longer sealing securely.
- Signs of moisture or contamination around the filler neck.
- Visible deterioration caused by age or fuel exposure.
- Loose-fitting fuel cap despite being correctly tightened.
- Evidence of vapour leakage around the fuel filler.
Why Replacement Matters:
- The fuel tank cap seal plays a vital role in maintaining the integrity of the fuel system by creating a tight seal between the fuel cap and the filler neck. A worn or deteriorated seal can allow fuel vapours to escape, permit contaminants or moisture to enter the fuel tank, and reduce the effectiveness of the fuel cap.
- Replacing the seal restores the correct sealing performance, helping to protect the fuel system, reduce fuel odours, and maintain reliable operation. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match fuel tank cap seal provides the correct fit, dependable quality, and long-lasting durability, making it an excellent choice for Porsche maintenance, fuel system repairs, and restoration projects.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64420127900
The product you are viewing cross references to these numbers
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
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12 Month Warranty
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Fits:
Porsche 356 A/540.1 1950-1959
Porsche 356 B-T5 1959-1965
Click 'Zoom in' for large part diagram.
Diagram ref no 3
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG20127000
The product you are viewing cross references to these numbers
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
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12 Month Warranty
Worldwide Delivery
The OE Match fuel tank lid for Porsche 356 / 356A / 356B T5 closes the fuel filler opening and works with the associated sealing ring. It provides a replacement option when the existing lid is missing, damaged or no longer seats correctly.
Fits:
- Porsche 356 A/540.1 1950–1959
- Porsche 356B 1959–63
- Porsche 356 B-T5 1959–1965
- Porsche 356 1950–55
Diagram Ref No 3
Check fitment for your specific vehicle (model, year, engine) before ordering. Confirm the filler arrangement, particularly the T5 qualification on 356B applications.
What Is This Part?
This is the removable lid used to close the fuel tank's filling opening. It forms part of the tank assembly alongside the sealing ring and breather components. The lid must sit correctly against its sealing surface so that the lid and ring can close the opening together. During fuel tank maintenance or restoration, inspect both the lid and the surrounding filler area rather than assuming that a sealing problem requires replacement of the tank itself.
What Does This Part Do?
- Closes the filler opening: Covers the opening after refuelling.
- Works with the sealing ring: Provides the closing surface against which the associated ring seals.
- Allows refuelling access: Can be removed to access the tank's filling opening and refitted afterwards.
- Covers the tank entrance: Helps keep dirt and moisture away from the opening when correctly fitted.
Why Replace This Part?
A damaged or distorted lid may not sit evenly against the filler opening. Wear at its retaining features can also prevent it from fastening correctly. Replacement is appropriate where inspection confirms that the lid itself is damaged, excessively worn or missing.
Check the sealing ring and filler seating surface at the same time. A hardened, split or displaced ring can cause poor sealing even when the lid remains serviceable. Fuel odours or staining warrant inspection of the surrounding tank connections and breather components as well; they do not identify the lid as the cause on their own.
When to Replace This Part?
- Visible damage: The lid is cracked, bent or distorted.
- Poor seating: It sits unevenly after the sealing ring and filler surface have been checked.
- Worn retention: It will not fasten securely because its retaining features are damaged.
- Surface deterioration: Corrosion or damage affects the lid's sealing contact area.
- Missing or unsuitable lid: The existing closure is absent or does not match the vehicle's filler arrangement.
Where Is This Part Fitted?
Location: At the fuel tank filler opening, where it closes against the associated sealing ring. Match the lid to the vehicle's existing tank and filler arrangement before fitting.
Product Summary
- Product: Fuel tank lid / filler cap.
- Brand: OE Match.
- Part reference: PCG20127000.
- Related reference: 64420127000.
- Purpose: Closes the fuel filler opening in conjunction with the associated sealing ring.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG20127000
The product you are viewing cross references to these numbers
- Porsche 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
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This OE Match RSR bonnet-mounted fuel filler kit suits the classic Porsche applications listed below. A reinforcement panel for the bonnet opening is included; the fuel cap is excluded.
Fits
Porsche 911 2.0-3.3 01/63-07/89
Check fitment for your specific vehicle (model, year, engine) before ordering.
What This Product Does
The kit provides an RSR-style fuel filler arrangement mounted through the bonnet. Its included reinforcement panel supports the bonnet opening as part of the installation. It is intended for projects using this filler layout rather than as a replacement for a conventional filler flap alone.
Functions
- Provides a bonnet-mounted fuel filling arrangement.
- Reinforces the opening with the supplied panel.
- Supports an RSR-style restoration or conversion project.
Technical Details
- Brand: OE Match.
- Installation location: bonnet.
- Configuration: RSR-style fuel filler kit.
- Included component: bonnet opening reinforcement panel.
- Fuel cap: not included.
Symptoms of Fault
When assessing an existing filler installation, check for petrol odours, wet marks around the neck, deteriorated seals and damaged connections. These signs do not identify the kit itself as faulty; inspect the adjoining hoses, cap and breather connections before deciding which components need renewal.
Why Replacement Matters
Damaged filler components or deteriorated connections can compromise sealing around the refuelling assembly. Review the complete installation when planning repairs or a conversion, including the condition of adjoining components. OE Match focuses on Porsche replacement applications, with specification review and sample assessment forming part of its development process.
FAQs
Is a fuel cap supplied?
No. Select a compatible cap separately for the intended installation.
Does the kit include bonnet reinforcement?
Yes. A panel to reinforce the filler opening is included.
What should be checked before fitting?
Confirm the vehicle application, bonnet arrangement and compatibility with the intended tank, cap and connecting components. Do not assume that additional seals, hoses or installation hardware are included.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1681150510
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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
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This kit will allow fuel filling through the centre of the bonnet while closed.
Fits:
Porsche 911 2.0-3.3 01/1963 - 07/1989
What it does:
• Allows refuelling with the bonnet closed via a secure cap and filler neck (centre mount).
• Restores proper sealing of the fuel system at the bonnet interface, helping prevent fuel vapour escape and maintaining correct appearance and function.
• Engineered to match the original equipment’s dimensions, fit and finish - ensuring correct alignment, safe fuel operation and the correct restoration look.
Over time, the original filler cap and assembly may suffer from corrosion, sealing deterioration, misalignment or damage - which can lead to fuel leaks, vapour escape, compromised aesthetics or difficulty in refuelling properly. Installing this kit ensures safe fuel system function, correct cap sealing, and restores the original design integrity and appearance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1681150910
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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
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12 Month Warranty
Worldwide Delivery
This kit will allow fuel filling through the centre of the bonnet while closed.
Fits:
Porsche 911 2.0-3.3 01/1963 - 07/1989
What it does:
• Allows refuelling with the bonnet closed via a secure cap and filler neck (centre mount).
• Restores proper sealing of the fuel system at the bonnet interface, helping prevent fuel vapour escape and maintaining correct appearance and function.
• Engineered to match the original equipment’s dimensions, fit and finish - ensuring correct alignment, safe fuel operation and the correct restoration look.
Over time, the original filler cap and assembly may suffer from corrosion, sealing deterioration, misalignment or damage - which can lead to fuel leaks, vapour escape, compromised aesthetics or difficulty in refuelling properly. Installing this kit ensures safe fuel system function, correct cap sealing, and restores the original design integrity and appearance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1681150410
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 356 1950-55
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
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12 Month Warranty
Worldwide Delivery
Fuel Filler Cap, Filler Neck & Filler Flap – Precision Fit, Safety, and Style for Porsche Models
Your Porsche’s fuel filler cap, filler neck, and filler flap play a vital role in ensuring a clean, sealed, and secure refuelling system. Together, they prevent fuel evaporation, maintain tank pressure, and protect against contamination, while also adding to the car’s exterior finish and functionality.
At Design911, we supply a comprehensive range of precision-engineered filler components, including fuel caps, filler necks, and flap assemblies designed to deliver perfect fitment, long-lasting durability, and performance-grade sealing. Manufactured from high-quality alloys, polymers, and coatings, these components ensure both safety and reliability in all driving conditions.
Whether you’re restoring a classic Porsche or maintaining a modern model, our manufacturer-quality fuel filler parts ensure secure sealing, corrosion resistance, and an original appearance — down to the last detail.
What Do Fuel Filler Components Do?
Each part of the fuel filler system serves a distinct function that contributes to both performance and safety:
Core Functions:
- Fuel Filler Cap: Seals the tank to prevent vapour loss, maintain pressure, and stop contaminants from entering.
- Filler Neck: Guides fuel smoothly from the filler opening into the tank without spillage or backflow.
- Filler Flap: Protects the filler assembly from dirt, debris, and weather exposure while completing the car’s design.
Together, these parts maintain proper fuel system integrity, vapour control, and aesthetics, ensuring your Porsche performs flawlessly on road or track.
Why Do Fuel Filler Caps, Necks, and Flaps Fail?
Over time, exposure to fuel vapour, moisture, and vibration can wear down even the most durable filler components.
Common Causes of Failure Include:
- Cracked or worn filler caps, leading to vapour leaks or check-engine lights (EVAP codes).
- Corrosion or degradation in metal filler necks.
- Broken hinges or clips on filler flaps.
- Seal deterioration, causing fuel odours or loss of pressure.
- Accidental damage from over-tightening or impact during refuelling.
A worn or damaged filler component can compromise fuel system sealing, trigger emissions faults, or simply detract from your Porsche’s aesthetic quality.
Why Replace with Precision-Engineered Fuel Filler Components?
Replacing aged or damaged filler components restores both performance and peace of mind. Our precision-fit filler caps, necks, and flaps are designed to meet or exceed manufacturer specifications for sealing, fit, and durability.
Key Benefits:
- Restores proper tank sealing and prevents vapour leakage.
- Eliminates fuel odours and EVAP-related warning lights.
- Prevents dirt and moisture intrusion into the fuel system.
- Enhances exterior finish with perfectly matched design and materials.
- Crafted from corrosion-resistant metals and fuel-safe polymers.
- Direct-fit replacements for a wide range of Porsche models.
Perfect for restorations, maintenance, or performance upgrades, these components ensure your Porsche retains both its technical integrity and design excellence.
Highlights:
- High-quality replacement filler caps, necks, and flaps for Porsche models.
- Precision-engineered sealing and corrosion resistance.
- Prevents leaks, vapour loss, and fuel contamination.
- Durable construction for long-term reliability.
- Direct-fit solutions for air-cooled and modern Porsche vehicles.
- Restores both performance and authentic visual appeal.
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Saturday: Closed
Sunday: Closed