do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Hose 12x19mm – Brake Servo & Inlet Manifold
Sold by the metre
High-quality 12x19mm hose designed for Porsche 911 turbo, 924, 928, and 944 models, supplied per metre for flexible installation and precise fitment.
This hose is used across both brake servo (brake booster) vacuum systems and inlet manifold applications, particularly on the 911 turbo and Porsche 928, where it plays a critical role in maintaining correct airflow and vacuum pressure.
Manufactured to OEM specifications, this hose ensures durability, flexibility, and resistance to heat and pressure, making it ideal for maintenance, repair, or restoration of Porsche braking and intake systems.
Key Features
• 12mm internal diameter, 19mm outer diameter
• Suitable for Porsche 911 Turbo, 924, 928, and 944
• Part number 99923901140
• Used for brake servo and inlet manifold applications
• Sold per metre for custom length requirements
• Resistant to heat and vacuum pressure
• Flexible and durable construction
• OEM-style fit and performance
Function and Purpose
This hose is a key component across multiple systems.
It helps to:
• Deliver vacuum pressure to the brake servo (booster)
• Maintain effective braking assistance
• Support airflow within the inlet manifold system
• Ensure stable engine performance
• Prevent vacuum leaks affecting operation
Why Replace Vacuum / Air Hoses
Over time, hoses degrade due to heat and pressure cycles.
Common issues include:
• Cracking or splitting
• Vacuum leaks reducing brake performance
• Hardening and reduced flexibility
• Air leaks affecting engine efficiency
Replacing worn hoses restores proper braking and engine system performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99923901140
The product you are viewing cross references to these numbers