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Fuel Injectors
Fits:
Porsche 914 2.0L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
039791761
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Free delivery
Fuel Injector Locating Bush Inner – Injector Mounting O-Ring
& Vibration Damper
Sold each
High-quality fuel injector locating bush designed for
Porsche 928S models with engines M28.19, M28.20, M28.21, and M28.22, and also
used in various other applications including select Mercedes models.
Fits:
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 914-4 (1970-1976)
Diagram ref no 27
This component is mounted over the fuel injector and functions as both a locating bearing and vibration-damping O-ring. It ensures the injector is correctly positioned while reducing movement and absorbing vibration within the fuel system.
Manufactured from durable rubber material, this locating bush is engineered to withstand fuel system conditions, heat, and long-term use while maintaining flexibility and sealing performance.
A direct replacement part, this injector locating inner bush is essential for maintaining proper injector alignment, reducing vibration, and ensuring reliable fuel delivery.
Key Features
• Direct replacement fuel injector inner locating bush / O-ring
• Suitable for Porsche 928S (M28.19 / M28.20 / M28.21 / M28.22)
• Also used in various compatible vehicle applications (including Mercedes)
• Provides injector positioning and vibration damping
• Durable rubber construction for long-term performance
• OEM-style fit and function
Function and Purpose
This locating bush acts as both a positioning guide and vibration damper for the fuel injector.
It helps to:
• Secure the injector in its correct position
• Absorb vibration within the fuel system
• Improve sealing and stability
• Support consistent fuel delivery and injector performance
Why Replace Your Injector Locating Bush
Over time, rubber sealing and damping components can degrade.
Common issues include:
• Hardened or cracked rubber
• Loss of elasticity and damping ability
• Poor injector seating or movement
• Fuel system vibration or instability
Replacing the locating bush restores proper injector fitment and improves overall system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
311133261A
The product you are viewing cross references to these numbers
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fuel Injector Locating Bush Inner – Injector Mounting O-Ring
& Vibration Damper
Sold each
High-quality fuel injector locating bush designed for
Porsche 928S models with engines M28.19, M28.20, M28.21, and M28.22, and also
used in various other applications including select Mercedes models.
Fits:
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 914-4 (1970-1976)
Diagram ref no 27
This component is mounted over the fuel injector and functions as both a locating bearing and vibration-damping O-ring. It ensures the injector is correctly positioned while reducing movement and absorbing vibration within the fuel system.
Manufactured from durable rubber material, this locating bush is engineered to withstand fuel system conditions, heat, and long-term use while maintaining flexibility and sealing performance.
A direct replacement part, this injector locating inner bush is essential for maintaining proper injector alignment, reducing vibration, and ensuring reliable fuel delivery.
Key Features
• Direct replacement fuel injector inner locating bush / O-ring
• Suitable for Porsche 928S (M28.19 / M28.20 / M28.21 / M28.22)
• Also used in various compatible vehicle applications (including Mercedes)
• Provides injector positioning and vibration damping
• Durable rubber construction for long-term performance
• OEM-style fit and function
Function and Purpose
This locating bush acts as both a positioning guide and vibration damper for the fuel injector.
It helps to:
• Secure the injector in its correct position
• Absorb vibration within the fuel system
• Improve sealing and stability
• Support consistent fuel delivery and injector performance
Why Replace Your Injector Locating Bush
Over time, rubber sealing and damping components can degrade.
Common issues include:
• Hardened or cracked rubber
• Loss of elasticity and damping ability
• Poor injector seating or movement
• Fuel system vibration or instability
Replacing the locating bush restores proper injector fitment and improves overall system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
311133261A
The product you are viewing cross references to these numbers
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914-4 1.7
Porsche 914 1.8/2.0
Porsche 928 1980-84
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
311133263
The product you are viewing cross references to these numbers
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Express Delivery
Fuel Injector Locating Bush – Injector Mounting O-Ring
& Vibration Damper
Sold each
High-quality fuel injector locating bush designed for
Porsche 928S models with engines M28.19, M28.20, M28.21, and M28.22, and also
used in various other applications including select Mercedes models.
Fits:
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 914-4 (1970-1976)
Diagram ref no 25
This component is mounted over the fuel injector and functions as both a locating bearing and vibration-damping O-ring. It ensures the injector is correctly positioned while reducing movement and absorbing vibration within the fuel system.
Manufactured from durable rubber material, this locating bush is engineered to withstand fuel system conditions, heat, and long-term use while maintaining flexibility and sealing performance.
A direct replacement part, this injector locating bush is essential for maintaining proper injector alignment, reducing vibration, and ensuring reliable fuel delivery.
Key Features
• Direct replacement fuel injector locating bush / O-ring
• Suitable for Porsche 928S (M28.19 / M28.20 / M28.21 / M28.22)
• Also used in various compatible vehicle applications (including Mercedes)
• Provides injector positioning and vibration damping
• Durable rubber construction for long-term performance
• OEM-style fit and function
Function and Purpose
This locating bush acts as both a positioning guide and vibration damper for the fuel injector.
It helps to:
• Secure the injector in its correct position
• Absorb vibration within the fuel system
• Improve sealing and stability
• Support consistent fuel delivery and injector performance
Why Replace Your Injector Locating Bush
Over time, rubber sealing and damping components can degrade.
Common issues include:
• Hardened or cracked rubber
• Loss of elasticity and damping ability
• Poor injector seating or movement
• Fuel system vibration or instability
Replacing the locating bush restores proper injector fitment and improves overall system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
311133263
The product you are viewing cross references to these numbers
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914 2.0L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91461200715
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Free delivery
Fuel Injectors – Precision Fuel Delivery for Porsche Performance and Efficiency
Fuel injectors are a crucial component in your Porsche’s engine management system, ensuring the precise amount of fuel is delivered to each cylinder for clean, efficient combustion. A properly functioning injector optimises power output, throttle response, and fuel economy — maintaining the performance standards Porsche is known for.
At Design911, we offer a comprehensive range of fuel injectors designed for Porsche models old and new — from air-cooled classics to the latest turbocharged engines. Built to manufacturer-quality standards using advanced materials and precision nozzles, our injectors ensure accurate fuel atomisation, consistent spray patterns, and long-term durability under extreme temperatures and pressures.
Whether you’re restoring a 911, maintaining a Cayman, or upgrading for performance driving, our injectors are engineered to deliver clean, efficient combustion and consistent engine response.
What Do Fuel Injectors Do?
Fuel injectors are electronically controlled valves that deliver precise amounts of pressurised fuel into the combustion chamber or intake manifold.
Core Functions:
- Atomise
and inject fuel for efficient combustion.
- Ensure
consistent air-fuel ratio across all cylinders.
- Improve engine responsiveness, power, and economy.
- Support emissions control by maintaining clean, complete fuel burn.
Every Porsche engine relies on its injectors for accurate fuel delivery — a vital factor in maintaining both performance and efficiency.
Why Do Fuel Injectors Fail?
Fuel injectors are exposed to heat, pressure, and fuel impurities, making them prone to gradual wear or clogging over time.
Common Causes of Failure Include:
- Fuel
contamination, leading to clogging or restricted flow.
- Carbon
build-up on the nozzle tips, disrupting spray pattern.
- Electrical
or coil failure, affecting signal timing.
- Internal
leaks due to seal deterioration or corrosion.
- Ethanol degradation, which can damage internal components.
Symptoms of injector failure include rough idling, poor acceleration, increased fuel consumption, misfires, or difficulty starting — all signs of inconsistent fuel delivery.
Why Replace with
Precision-Engineered Fuel Injectors?
Replacing worn or clogged injectors restores proper fuel
delivery, maximising power, smoothness, and efficiency. Our performance-grade,
direct-fit injectors are designed to provide consistent fuel flow,
superior atomisation, and long service life.
Key Benefits:
- Restores power and throttle response.
- Improves fuel economy and engine smoothness.
- Prevents misfires, stalling, and hard starts.
- Reduces emissions through cleaner combustion.
- Crafted from high-quality, corrosion-resistant materials.
- Direct-fit design for easy installation and long-term reliability.
Perfect for preventative maintenance or performance upgrades, these injectors deliver manufacturer-level precision and durability for every Porsche engine.
Highlights:
- High-quality
replacement fuel injectors for Porsche models.
- Precision-engineered
nozzles for accurate atomisation.
- Tested for pressure stability and spray accuracy.
- Improves power, efficiency, and emissions performance.
- Compatible with classic and modern Porsche engines.
- Essential for restorations, rebuilds, and tuning projects.
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed