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- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
Intercooler to Cut-Off Valve Pressure Hoses
These intercooler to cut-off valve pressure
hoses are designed for the Porsche 991.2 Turbo and form an essential part of
the charge air system. They connect the intercooler to the cut-off (diverter)
valve, ensuring controlled airflow and pressure regulation within the turbo
system.
Fits:
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
Diagram ref no 5 and 6
In a high-performance twin-turbo engine, managing boost pressure is critical. These hoses allow pressurised air to be routed correctly between components, supporting both performance and system protection.
What These Pressure Hoses Do
These hoses link the intercooler to the cut-off valve, which regulates excess boost pressure when the throttle closes.
They help:
• Maintain stable and controlled boost
pressure
• Allow excess pressure to be safely redirected via the cut-off valve
• Ensure smooth throttle transitions and turbo response
• Support efficient airflow within the charge air system
• Protect turbochargers from pressure surges
A properly functioning hose ensures the turbo system operates smoothly and efficiently.
Why Intercooler to Cut-Off Valve Hoses Fail
Due to their position within the turbo system, these hoses are exposed to high pressure, heat and constant airflow.
Common causes include:
Heat and pressure cycling
Repeated expansion and contraction weakens hose material.
Cracking or splitting
Rubber or reinforced sections can degrade over time.
Boost pressure stress
High boost levels place additional strain on hose walls.
Seal and connection wear
Clamps and joints may deteriorate, leading to leaks.
Symptoms of Failing Pressure Hoses
• Boost leaks or inconsistent turbo pressure
• Hissing noise during acceleration or gear changes
• Reduced engine performance
• Poor throttle response
• Engine warning lights related to boost control
• Increased turbo lag
Replacing worn hoses restores proper boost regulation and system efficiency.
Why You May Need to Replace These Hoses
Restore Boost Control
Ensures the cut-off valve operates correctly under all conditions.
Eliminate Boost Leaks
Prevents pressure loss within the charge air system.
Improve Throttle Response
Supports smooth transitions during acceleration and gear changes.
Protect Turbo Components
Prevents pressure spikes that can damage turbochargers.
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99111024
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- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
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Fits:
Porsche 982 (718) Boxster
Porsche 982C (718) Cayman
Click 'Zoom in' for large parts diagram.
Diagram ref no 38
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The TTE465 Turbo upgrade for the 718 horizontally-opposed flat-4 turbocharged 2.0L displacement motor. Still keeping the original turbocharger but utilizing a larger high flow 9 blade lightweight turbine and fitment of a bigger 7+7 blade milled billet compressor so producing extra power but still focused on response as most all TTE upgrades.
Equilibrium:
Precisely balancing our turbochargers is a key critical factor to become a TTE upgrade unit as longevity and performance are paramount. Good balance improves acoustics also. Subsequent great care is taken with all TTE turbochargers to achieving our balance standards. Firstly parts are balanced at slow speeds up to 2800RPM in multiple planes using our single parts machine, then components are assembled and then the CHRA are dynamically balanced, but this time depending on application at up to 250,000 RPM in multiple planes using our in house VSR machine to acquire the ultimate equilibrium, to a standard far higher than OEM. Each turbocharger is supplied with serial numbered balance test result document.
• Original turbocharger as the base part
• TTE Billet Milled 7x7 compressor wheel
• TTE High-Flow Low-Mass 9 blade Turbine
• Early boost response
• 465 PS Capable on 102ron
• Plug & Play installation
• Proven TheTurboEngineers quality
• Single parts finely balanced then components assembled and core high-speed VSR balanced
• Supplied with a balance test result document
• Made in Germany
- Porsche Boxster 718 2.0L Manual (300 Bhp) 2017>>
- Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
- Porsche Boxster S 718 2.5L Manual (350 Bhp) 05/2017>>
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- Porsche Cayman 718 2.0L Manual (300 Bhp)
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- Porsche Cayman S 718 2.5L PDK (350 Bhp)
Fits:
Porsche 982 (718) Boxster
Porsche 982C (718) Cayman
Diagram ref no 38
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Fits:
Porsche 982 (718) Boxster 2017>>
Porsche 982C (718C) Cayman 2017>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 11
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