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Original Porsche Part Genuine Porsche part 99110663801
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
Fits:
Porsche 991.1 Carrera 2012-16
Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110662
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
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12 Month Warranty
Worldwide Delivery
Fits:
For cars with centre radiator (option code: 153)
Porsche 991.1 Carrera 2012-16
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-16
Click 'Zoom in' for large parts diagram.
Diagram ref no 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110663802
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
For cars with centre radiator (option code: 153)
Porsche 991.1 Carrera 2012-16
Porsche 981 Boxster 2012-16
Porsche 981C Cayman 2014-16
Click 'Zoom in' for large parts diagram.
Diagram ref no 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110663901
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 991.1 Carrera 2012-16
Porsche 981 Boxster 2012-16
Porsche 981SP Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981 Cayman GT4 2016
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110662
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
Shop Securely
12 Month Warranty
Worldwide Delivery
Express Delivery
Fits:
Porsche 991 Carrera 2012-16
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110662
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 991 Carrera 2012-16
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110662
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
Shop Securely
12 Month Warranty
Worldwide Delivery
Express Delivery
Fits:
Porsche 991 Turbo / S 2014-20 - Excludes GT2 RS
Porsche 991-1 GT3 / RS 2014-17
Diagram ref. 10.
NOTE: Our product image shows 99110663201, which is for the right-side radiator.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110663
The product you are viewing cross references to these numbers
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- 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
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
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12 Month Warranty
Worldwide Delivery
Express Delivery
Centre Radiator, Coolant Hoses & Mountings Kit
This complete kit includes a direct-fit centre radiator, left and
right coolant hoses and radiator mountings. Designed to OEM specifications, the set ensures
efficient engine cooling, leak-free connections, and secure mounting. By
replacing the radiator, hoses, and mountings together, you restore the cooling
system’s reliability and avoid weak points that can lead to costly engine
damage.
Fits:
Porsche Boxster 981 2.7L 2012-16
Porsche Boxster S / GTS 981 3.4L 2012-16
Porsche 991 Carrera C2 3.4L (350Bhp)
Porsche 991 Carrera C2S 3.8L (400Bhp)
Porsche 991 Carrera C4 3.4L (350Bhp)
Porsche 991 Carrera C4S 3.8L (400Bhp)
Porsche Cayman 2.7L 981 2013-16
Porsche Cayman S / GTS 3.4L 981 2013-16
What the Products Do
- Radiator: Dissipates heat from engine coolant to maintain safe
operating temperatures.
- Coolant
Hoses: Carry coolant between the
radiator and engine, ensuring proper circulation under pressure.
- Mountings: Securely hold the radiator in place, preventing movement, vibration, and premature wear.
Together, they form a complete cooling solution that keeps your engine protected and performing as intended.
Symptoms of Failure
- Rising engine temperatures or overheating
- Coolant leaks around radiator or hose connections
- Bulging, cracked, or soft coolant hoses
- Rattling or loose radiator due to failed mounts
- Sweet coolant smell from the engine bay
- Low coolant levels requiring frequent top-ups
Common Reasons for Failure
- Heat
& Pressure Cycles: Repeated expansion and contraction cause
radiator and hoses to weaken over time.
- Material
Aging: Rubber hoses harden or swell, while plastic mounts may crack.
- Coolant
Quality: Old or contaminated coolant accelerates corrosion and
internal damage.
- Vibration & Stress: Worn mounts allow radiator movement, leading to leaks and structural failure.
Why Replace as a Kit?
- Restores complete cooling system integrity in one service.
- Prevents breakdowns by addressing all common weak points at once.
- New mounts ensure secure fitment and reduced vibration.
- Protects against overheating and costly engine repairs.
- Saves labour costs compared to replacing components individually.
Kit contains a Mahle radiator and Original Porsche hoses and mountings
Diagram ref no 1, 4, 5, 6 and 7
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110613702
The product you are viewing cross references to these numbers
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
Centre Radiator Coolant Hose
These coolant hoses are designed for the centre radiator on
the Porsche 991 Turbo, forming an important part of the high-performance
cooling system used in Porsche’s twin-turbocharged flat-six engines.
Fits:
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- 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 7
The hoses ensure coolant flows correctly between the engine and the centre radiator, allowing excess heat to be dissipated efficiently. Maintaining proper coolant circulation is essential for protecting the engine from overheating and ensuring reliable performance under demanding driving conditions.
What These Coolant Hoses Do
The Porsche 991 Turbo cooling system uses multiple radiators positioned at the front of the vehicle to manage the large amount of heat generated by the turbocharged engine.
The centre radiator hoses perform several key functions:
• Carry coolant to and from the centre radiator
• Support proper coolant circulation through the cooling system
• Help regulate engine temperature under high load conditions
• Maintain efficient heat dissipation during spirited driving
Without these hoses functioning correctly, coolant flow may be restricted, reducing cooling efficiency and increasing the risk of overheating.
Why Coolant Hoses Fail
Cooling system hoses are constantly exposed to high temperatures, pressure and vibration. Over time these stresses can lead to deterioration.
Common causes of coolant hose failure include:
Heat ageing
Continuous heat cycles cause rubber hoses to harden and lose flexibility.
Pressure fatigue
Cooling systems operate under pressure, which can cause weakened hoses to swell
or crack.
Chemical degradation
Coolant additives and contaminants can break down rubber compounds over time.
Mechanical wear
Engine movement and vibration may cause abrasion or stress on hose connections.
Symptoms of Worn or Failing Coolant Hoses
• Coolant leaks from the front of the vehicle
• Low coolant warning messages
• Sweet coolant smell near the front bumper area
• Rising engine temperatures
• Visible cracking, swelling or deterioration in the hose material
Replacing worn hoses helps prevent unexpected coolant loss and ensures the cooling system operates correctly.
Why You May Need to Replace These Hoses
Protect Engine Performance
The Porsche 991 Turbo engine generates significant heat, making reliable
cooling system components essential.
Prevent Coolant Leaks
Replacing ageing hoses helps maintain system pressure and prevent leaks.
Maintain Cooling Efficiency
Healthy hoses ensure proper coolant flow through the centre radiator and the
rest of the cooling system.
Prevent Costly Engine Damage
Overheating caused by coolant loss can lead to severe engine damage if not
addressed quickly.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99110664901
The product you are viewing cross references to these numbers
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- 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
Shop Securely
12 Month Warranty
Worldwide Delivery
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed