Hose 4 x 10mm Sold by the Metre forInlet Manifold. Porsche 911 turbo / 964 turbo / 928 / 928S  ❭  00004320494

Hose - 4 x 9mm 
Sold by the metre

High-quality 4x9mm hose designed for Porsche 911 Turbo (1978–1983), 964 Turbo, and Porsche 928 (1978–1983) models, supplied per metre for precise fitment and flexible installation.

This hose is used within the inlet manifold system, where it plays a key role in maintaining correct airflow and vacuum balance. Proper function of this hose is essential for stable engine performance, efficient combustion, and reliable turbo operation.

Manufactured to OEM specifications, this hose provides durability, flexibility, and resistance to heat and pressure, making it ideal for maintenance, repair, or restoration of Porsche intake systems.

Key Features

• 4mm internal diameter, 9mm outer diameter
• Suitable for Porsche 911 Turbo (1978–1983), 964 Turbo, and 928 (1978–1983)
• Part number 00004320494
• Designed for inlet manifold and intake system use
• Sold per metre for custom length applications
• Resistant to heat and engine bay conditions
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose is an important part of the intake system.

It helps to:
• Maintain correct airflow within the inlet manifold
• Regulate vacuum pressure for engine systems
• Support efficient combustion and engine performance
• Prevent air leaks affecting drivability
• Ensure stable turbo and intake system operation

Why Replace Intake Hoses

Over time, intake hoses degrade due to heat and pressure.

Common issues include:
• Cracking or splitting
• Air leaks reducing engine performance
• Hardening and reduced flexibility
• Inconsistent engine operation

Replacing worn hoses restores proper airflow and engine efficiency.