Rubber Sleeve For Air Intake. Porsche 911 SC / 928 1978-84

Rubber Sleeve For Air Intake.
The Porsche Rubber Sleeve for Air Intake is a genuine OEM replacement part designed to provide a secure, airtight connection within the air intake system. Used on classic Porsche 928 (1978–1984) and select 911 SC (1978–1979) models, this rubber sleeve links rigid intake components while absorbing vibration and movement.

Fits:

• Porsche 911 1978-1983 3.0L / SC
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83 (USA, Canada, Japan Models Only)
  
  

What This Product Does:
The rubber sleeve acts as a seal and flexible hose between rigid parts of the intake system (for example between the airbox, intake manifold, or distributor, depending on configuration). It ensures air travels properly without leaks.

Symptoms Of A Worn Out Sleeve:

• Rough idle or uneven running — because air is leaking in (unmetered air), messing up the mixture.
• Hissing or whistling sounds from under the hood, particularly around where the sleeve is located.
  
• Hard starting or hesitation when accelerating, especially if the leak affects air flow under load.
  
• Reduced performance or lack of throttle response.
  
• Possibly engine warning lights / codes related to airflow, air/fuel mixture, or vacuum leaks.
  
  

Why Replacement Matters:

• Prevents air leaks which can lead to rich or lean mixtures, poor throttle response, lower fuel efficiency, and possible engine damage over time.
  
• Helps maintain smooth running and reliability of older Porsche engines, where leaks or perished rubber hoses are common weak points.
  
• Preserves engine health by ensuring the correct air/fuel ratio. Unmetered air can contribute to detonation or stress on components.
• Maintains OEM specification — using a correctly sized, good-quality rubber sleeve helps ensure fit, sealing, and durability.

Diagram Ref No 10

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Related, superseded, cross reference or alternative numbers for comparison.

92811015801

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