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Coolant Hoses - Centre Section

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DISPLAYING 1 to 6 (of 6 products)
WATERPIPEKIT996C4
Product Information
Product Information
Water coolant middle section pipe kit. Porsche 996 C4 3.4L / 3.6L

Fits:
Porsche 996 C4 3.4L / 3.6L 


Kits comes with both supply and return hoses, breather pipes and all clips

Diagram ref: #10, #11, #5, #6, #23



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Related, superseded, cross reference or alternative numbers for comparison.

WATERPIPEKIT996C4
99610672703
99610672705
99610672706
99610672803
99610672805
99610672806
99610672302
99610672304
99610672305
99610672403
99610672405
99610672406
99951249900

The product you are viewing cross references to these numbers
Special Order item
99610613556
Product Information
Product Information
Breather hose.

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 996 3.4L / 3.6L Carrera 1997-05
Porsche 996 GT3 3.6L 1999-05

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

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Related, superseded, cross reference or alternative numbers for comparison.

99610613556
99610613556
99610613555
99610613552
99610613551

The product you are viewing cross references to these numbers
Special Order item
99610612754
Product Information
Product Information
Breather line water cooling system. 

porsche

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 996  - 1997 to 2005
Porsche 996 GT3 - 1999 to 2005

Click 'Zoom in' for large parts diagram.
Diagram ref no 16



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Related, superseded, cross reference or alternative numbers for comparison.

99610612754
99610612754
99610612753
99610612752
99610612751

The product you are viewing cross references to these numbers
Special Order item
99610675203
Product Information
Product Information
Cooling water pipe, feed.

porsche

Fits:
Porsche 996 C4 3.4L / 3.6L 1998-05
Porsche 996 Turbo 2001-05

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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Related, superseded, cross reference or alternative numbers for comparison.

99610675203
99610675203

The product you are viewing cross references to these numbers
Special Order item
99610661153
Product Information
Product Information
Water coolant pipe FEED. 

Fits:
Porsche 986 Boxster S - 1999 to 2004

Porsche 996 - 1997 to 2005
Porsche 996 turbo - 2001 to 2005
Porsche 996 GT3 - 2000 to 2004

Diagram ref no 1



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

99610661153
99610661153
99610661152

The product you are viewing cross references to these numbers
Special Order item
99610661554
Product Information
Product Information
Water Pipe, Return. 
Sold Each.

Fits:
Porsche 986 Boxster S 3.2L 1999>>2004

Porsche 996 Carrera 3.4L / 3.6L 1998>>2005
Cars With Engine Codes:
M96.01 / M96.02 / M96.03 / M96.04

Porsche 996 GT2 2001>>2005

Porsche 996 GT3 1999>>2005
Cars With Engine Codes:
M96.76 / M96.79

Diagram Ref No 7

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

99610661554
99610661554
99610661553

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DISPLAYING 1 to 6 (of 6 products)
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About Coolant Hoses - Centre Section

Coolant Hoses – Centre Section | Reliable Cooling for Porsche Performance

The centre section coolant hoses are vital components of your Porsche’s engine cooling system, responsible for circulating coolant between the front and rear of the vehicle. These hoses maintain consistent coolant flow through the radiator and engine, ensuring optimal temperature regulation and preventing overheating — essential for both performance and longevity.

At Design911, we supply a full range of genuine and high-quality coolant hoses in the centre section for Porsche models including 911, Boxster, Cayman. Each hose is engineered to deliver factory-accurate fitment, high heat resistance, and long-lasting durability under the extreme pressures of Porsche’s high-performance cooling systems.

What Do Centre Section Coolant Hoses Do?

Coolant hoses act as the lifelines of your Porsche’s cooling system. The centre section hoses connect key parts of the cooling circuit, helping to:

  • Transfer coolant between the engine, radiator, and water pump.
  • Regulate engine temperature during all driving conditions.
  • Maintain system pressure for consistent cooling performance.
  • Prevent overheating and protect the engine from thermal stress.

Their design ensures smooth, efficient coolant flow — especially important in Porsche models with long mid- or rear-engine coolant routing systems.

Why Do Coolant Hoses Fail?

Over time, coolant hoses are exposed to constant pressure, high temperatures, and fluid corrosion. This can lead to:

  • Rubber degradation or cracking from heat cycling.
  • Coolant leaks due to worn hose ends or clamps.
  • Swelling or soft spots caused by chemical breakdown.
  • Abrasion damage from contact with nearby components.
  • Age-related hardening, reducing flexibility and sealing strength.

Common signs of hose failure include visible cracks, coolant puddles under the car, engine temperature fluctuations, or low coolant levels.

Why Replace Faulty Coolant Hoses?

A weakened or leaking coolant hose can quickly lead to overheating, engine damage, or complete coolant loss. Replacing worn hoses ensures your Porsche’s cooling system operates safely and efficiently.

Benefits of replacement include:

  • Restored, leak-free coolant circulation.
  • Improved temperature control and engine protection. 
  • Prevention of overheating and costly repairs.
  • Manufacturer-quality construction and precision fit.

All hoses in this range are made from high-performance rubber compounds and reinforced materials, designed to meet exacting standards for flexibility, strength, and heat resistance.

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