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 Boxster 981 Spyder 3.8L 2016
- Porsche Cayman GT4 3.8L 2015-16
Coolant Hose for Centre Radiator
The coolant hose is a critical cooling system component designed for the
Porsche 981 Cayman GT4 and 981 Boxster Spyder. This hose forms part of the
engine’s coolant circulation system, helping transport coolant between key
cooling components to regulate engine temperature.
Fits:
- Porsche Boxster 981 Spyder 3.8L 2016
- Porsche Cayman GT4 3.8L 2015-16
Diagram Ref No 6
High-performance models such as the GT4 and Boxster Spyder generate significant heat during spirited driving and track use. Maintaining a healthy cooling system is essential for protecting the engine and ensuring consistent performance.
What This Coolant Hose Does
Coolant hoses carry engine coolant between the radiator, engine block and other cooling system components. This allows heat to be transferred away from the engine and dissipated through the radiators.
This hose helps:
• Maintain stable engine operating temperatures
• Prevent overheating during high load driving
• Ensure proper coolant circulation
• Protect internal engine components from heat damage
A properly functioning hose is essential for the performance and longevity of the Porsche 981 GT4 and Boxster Spyder engines.
Why Coolant Hoses Fail
Cooling system hoses are exposed to constant heat cycles, pressure changes and chemical exposure from coolant. Over time, this can lead to deterioration.
Common causes of failure include:
Heat ageing
Repeated heating and cooling cycles can cause rubber to harden, crack or lose
flexibility.
Internal weakening
Pressure within the cooling system can cause weakened hoses to swell or split.
Coolant contamination
Old coolant or debris can degrade rubber materials from the inside.
Mechanical wear
Vibration and contact with surrounding components can wear down hoses over
time.
Symptoms of a Failing Coolant Hose
• Coolant leaks under the vehicle
• Visible cracks or swelling in the hose
• Engine overheating warnings
• Low coolant level warnings
• Sweet coolant smell from the engine bay
Replacing worn hoses early helps prevent coolant loss and potential engine overheating.
Why You May Need to Replace This Hose
Protect Engine Reliability
A damaged hose can lead to sudden coolant loss, which may cause severe
overheating and engine damage.
Prevent Cooling System Leaks
Replacing ageing hoses ensures the cooling system remains sealed and
pressurised correctly.
Maintain Performance Under Load
GT4 and Spyder models are often driven enthusiastically. A properly functioning
cooling system is essential to maintain safe operating temperatures during
spirited or track driving.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98110663890
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 99710662603
- 99710662604
Click "Zoom in" to see the diagram.
Diagram ref no 10.
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 99710662503
Click "Zoom in" to see the diagram.
Diagram ref no 10.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662504
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
Porsche 987 Boxster / S MKI & MKII 2005>>
Porsche 987C Cayman / S MKI & MKII 2006>>
Porsche 997 GT3 2007-2010
Porsche 997 Carrera 2/2S MKI & MKII 2005>> CABRIO/COUPE
This product supersedes Porsche's old part numbers:
- 997 106 622 03
Diagram ref no 10
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710662204
The product you are viewing cross references to these numbers