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Porsche > Engine Rebuild Parts > Air Intake & Injection > Hoses / Pipes / Sleeves >

Air Hose to Cut Off Valve. Porsche 964 turbo / 993 turbo  ❭  00004320498

Air Hose to Cut Off Valve. Porsche 964 turbo / 993 turbo - 00004320498
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00004320498
Product Information
Product Information

Cut Off Valve Air Hose - 24 x 4.9mm

High-quality cut off valve air hose designed for Porsche 964 turbo and 993 turbo models, with a 24x4.9mm specification for correct fitment within the turbocharger air system.

Fits:

  • Porsche 964 (911) TURBO 3.3L 1991-93
  • Porsche 964 (911) TURBO 3.6L 1991-93
  • Porsche 993 (911) TURBO 1994-96
  • Porsche 993 (911) GT2 1994-97
  • Porsche 993 (911) TURBO S 1994-97

Diagram ref no 44  

This hose connects the cut-off (recirculation) valve within the intake system, playing a critical role in managing boost pressure and airflow during throttle changes. It helps prevent compressor surge and ensures smooth turbo operation by recirculating excess air back into the intake system.

Manufactured to OEM standards, this hose provides durability, flexibility, and resistance to heat and pressure, making it ideal for maintaining performance and reliability in turbocharged Porsche engines.

Key Features

• 24x4.9mm air hose for turbo applications
• Suitable for Porsche 964 Turbo and 993 Turbo
• Part number 00004320498
• Designed for cut-off / recirculation valve systems
• Maintains boost pressure control
• Resistant to heat and pressure
• OEM-style fit and performance

Function and Purpose

This hose is a vital component within the turbo intake system.

It helps to:
• Connect the cut-off (bypass) valve to the intake system
• Manage excess boost pressure
• Prevent turbo compressor surge
• Maintain smooth airflow during throttle transitions
• Support consistent turbo performance

Why Replace Air Hoses

Turbo system hoses are subject to high pressure and temperature.

Common issues include:
• Cracking or splitting
• Boost leaks reducing performance
• Hardening and loss of flexibility
• Reduced turbo efficiency

Replacing worn hoses restores proper boost control and engine performance.



Related reference numbers
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00004320498
00004320498

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