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Porsche > 911 & 912 (1965-1989) > 911 1974-1977 2.7L / 1976-77 3.0 Carrera > Exhausts >

Wastegate

Wastegate

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Hose 8x14mm Wastegate, Warm Up Regulator and 911 Coolant Tank. Porsche 911 / 911 turbo / 928 - 99918170950
3
Hose 8x14mm Wastegate, Warm Up Regulator and 911 Coolant Tank. Porsche 911 / 911 turbo / 928
Special Order item
99918170950
Product Information
Product Information

Hose 8 x 14mm Wastegate, Warm Up Regulator & Coolant Expansion Tank
Sold per metre

High-quality hose designed for multiple Porsche applications, including the warm-up regulator (WUR) and turbocharger wastegate systems on the Porsche 911, as well as the coolant expansion bottle on the Porsche 928.

This versatile hose supports both fuel/air control systems and coolant circulation, making it an essential component for maintaining proper engine performance, boost control, and cooling system efficiency.

Fits:

  • Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
  • Porsche 911 1978-1983 3.0L / SC
  • Porsche 911 1975-1977 3.0L Turbo (930)
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86
  • Porsche 928S4 5.0L 1987-92
  • Porsche 928GT 5.0L 1989-91
  • Porsche 928GTS 5.4L 1992-95

Diagram ref no 16 and 46  

Supplied per metre, this hose allows precise length replacement and flexible routing, making it ideal for maintenance, repair, or restoration of Porsche engine bay systems. Manufactured to OEM specifications for durability and reliable performance.

Key Features

• 8mm internal diameter, 14mm outer diameter
• Suitable for Porsche 911 and Porsche 928
• Part number 99918170950
• Multi-use: WUR, wastegate, and coolant expansion systems
• Sold per metre for custom length applications
• Resistant to heat, pressure, and fluid exposure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose is used across several critical systems.

It helps to:
• Supply air or pressure signals to the warm-up regulator (WUR)
• Support turbocharger wastegate operation and boost control
• Transport coolant to/from the expansion bottle (928)
• Maintain system pressure and fluid flow
• Ensure reliable engine and turbo performance

Why Replace Hoses

Hoses degrade over time due to heat, pressure, and fluid exposure.

Common issues include:
• Cracking or splitting
• Boost or vacuum leaks affecting performance
• Coolant leaks leading to overheating
• Hardening and reduced flexibility

Replacing worn hoses ensures safe operation and restores system efficiency.



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

99918170950
99918170950

The product you are viewing cross references to these numbers
Hose 8x14mm Wastegate, Warm Up Regulator and 911 Coolant Tank. Porsche 911 / 911 turbo / 928 - 99918170950 - PSKW8
3
Hose 8x14mm Wastegate, Warm Up Regulator and 911 Coolant Tank. Porsche 911 / 911 turbo / 928
99918170950/1
Product Information
Product Information

Hose 8 x 14mm Wastegate, Warm Up Regulator & Coolant Expansion Tank
Sold per metre

High-quality hose designed for multiple Porsche applications, including the warm-up regulator (WUR) and turbocharger wastegate systems on the Porsche 911, as well as the coolant expansion bottle on the Porsche 928.

This versatile hose supports both fuel/air control systems and coolant circulation, making it an essential component for maintaining proper engine performance, boost control, and cooling system efficiency.

Fits:

  • Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
  • Porsche 911 1978-1983 3.0L / SC
  • Porsche 911 1975-1977 3.0L Turbo (930)
  • Porsche 928 4.5L 1978-82
  • Porsche 928S 4.7L 1981-83
  • Porsche 928S2 4.7L 1984-86
  • Porsche 928S4 5.0L 1987-92
  • Porsche 928GT 5.0L 1989-91
  • Porsche 928GTS 5.4L 1992-95

Diagram ref no 16 and 46  

Supplied per metre, this hose allows precise length replacement and flexible routing, making it ideal for maintenance, repair, or restoration of Porsche engine bay systems. Manufactured to OEM specifications for durability and reliable performance.

Key Features

• 8mm internal diameter, 14mm outer diameter
• Suitable for Porsche 911 and Porsche 928
• Part number 99918170950
• Multi-use: WUR, wastegate, and coolant expansion systems
• Sold per metre for custom length applications
• Resistant to heat, pressure, and fluid exposure
• Flexible and durable construction
• OEM-style fit and performance

Function and Purpose

This hose is used across several critical systems.

It helps to:
• Supply air or pressure signals to the warm-up regulator (WUR)
• Support turbocharger wastegate operation and boost control
• Transport coolant to/from the expansion bottle (928)
• Maintain system pressure and fluid flow
• Ensure reliable engine and turbo performance

Why Replace Hoses

Hoses degrade over time due to heat, pressure, and fluid exposure.

Common issues include:
• Cracking or splitting
• Boost or vacuum leaks affecting performance
• Coolant leaks leading to overheating
• Hardening and reduced flexibility

Replacing worn hoses ensures safe operation and restores system efficiency.



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

99918170950
99918170950

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
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About Wastegate

Porsche Wastegate

At Design911, we supply a wide range of wastegate parts and turbo boost control components for Porsche models, helping you maintain performance, reliability and enjoyment from your car.

Why do Wastegates matter?

Wastegates are critical for controlling turbocharger boost pressure on Porsche models. Over time, heat, vibration and exhaust contamination can cause the valve, diaphragm or actuator to stick, leak or fail, leading to boost issues and reduced performance. Keeping the boost control system in good order helps protect the engine and ensures the turbo works as intended.

  • Keep your Porsche looking smart rather than tired or neglected
  • Help protect the surrounding area from dirt and corrosion where relevant
  • Reduce minor niggles such as looseness, rattles or mismatched parts
  • Support long-term enjoyment, pride of ownership and potential resale value

Common options & kits

Individual replacement parts 

Specific items to address a particular area or issue without changing everything at once.

  • Ideal for targeted repairs
  • Lets you replace only what is needed
  • Helps keep initial costs under control

Matched sets or pairs 

Components supplied together so both sides or related items are renewed at the same time.

  • Consistent feel and performance
  • Helps avoid uneven wear or behaviour
  • A sensible choice for routine maintenance

Complete kits 

Grouped parts designed to refresh a whole system or area in one go, useful for upgrades and restorations.

  • Everything specified in a single package
  • Saves time compared with sourcing parts individually
  • Ideal when upgrading or restoring your Porsche

Brands & quality options

At Design911, we stock genuine Porsche parts where available, plus OEM-equivalent and carefully selected aftermarket brands. This lets you choose between keeping things original, adding subtle upgrades or managing budgets on everyday maintenance.

Dansk 

Dansk, part of JP Group, supplies a wide range of replacement parts, including exhaust and related components suitable for Porsche models. Their products are widely used as a practical alternative to genuine parts in maintenance and restoration.

Fabspeed 

Fabspeed Motorsport develops high-quality performance upgrades with a focus on Porsche exhaust and intake systems. Their components are engineered for fit, durability and performance on Porsche turbo models.

Koblenz 

Always choose the correct part number and check fitment details carefully to ensure Koblenz components match your specific Porsche model and turbo system.

Porsche 

Genuine Porsche parts are designed and tested specifically for each model, offering OE fit and compatibility with factory turbo and engine management systems.

Victor Reinz 

Victor Reinz is an OEM supplier known for sealing solutions that meet Porsche standards, particularly in engine and exhaust areas. Their parts are widely used in professional workshop repair and maintenance.

When should you review or replace your Porsche wastegate?

Checking wastegate components regularly helps you spot wear, damage or age-related deterioration before it affects performance or leads to more expensive repairs later on.

  • Existing parts are worn, cracked, sticking, leaking or contaminated with heavy carbon build-up
  • You experience overboost, underboost, inconsistent boost or fault codes related to turbo control
  • The turbo feels laggy, unresponsive or power delivery is no longer smooth
  • You are increasing power, fitting a larger turbo or preparing the car for track or spirited driving

If any of these apply, it is a good time to review your wastegate and related boost control hardware, so your Porsche stays dependable and enjoyable to drive.

Explore Porsche wastegate with Design911

Browse wastegate parts and turbo boost control components for Porsche at Design911 — from individual valves and actuators to related fittings and hardware — and find options to suit routine maintenance, upgrades and full builds.

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