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Power Steering Pipes / Hoses / Radiators

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DISPLAYING 1 to 16 (of 17 products)
1 2
Special Order item
99634767
Product Information
Product Information
Bracket for power steering pressure line. For RHD cars

porsche

Fits:
Porsche 986 Boxster 1997-04
Porsche 996 Carrera 1998-05

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99634767
99634767101
99634767201

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Special Order item
99951255400
Product Information
Product Information
Hose clamp, 12-22 mm - Various Applications.

porsche

Fits:
Porsche 911 - 1978 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 986 Boxster - 1997 to 2004
Porsche 996 - 1997 to 2005
Porsche 997.1 - 2005 to 2008



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99951255400
99951255400

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Special Order item
99634754553
Product Information
Product Information
Power steering centre pressure line.

porsche

Fits:
Porsche 996 Carrera 2002-05
Porsche 996 Turbo 2001-05
Porsche 996 GT3 2001-05

Click 'Zoom in' for large parts diagram
Diagram ref no 6

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99634754553
99634754553
99634754552
99634754551

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Special Order item
00004330574
Product Information
Product Information
Power steering fluid.  1 Litre

Pentosin Hydraulic System Fluid

porsche

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00004330574
00004320656
00004330574

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Special Order item
99923054340
Product Information
Product Information
Power steering line seal set, Pressure line to rack.
Sold each.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1  Cayman 2006 - 2008
Porsche 996 Carrera 1998 - 2005
Porsche 996 Turbo 2000 - 2005
Porsche 996 GT3 1999 - 2005
Porsche 997.1 Carrera 2005 - 2008
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 GT2-RS 2010 - 2013

Diagram ref no 17

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99923054340
99923054340

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Special Order item
99923054240
Product Information
Product Information
Power steering line seal, return line to rack.
Sold each.

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1  Cayman 2006 - 2008
Porsche 996 Carrera 1998 - 2005
Porsche 996 Turbo 2000 - 2005
Porsche 996 GT3 1999 - 2005
Porsche 997.1 Carrera 2005 - 2008
Porsche 997.1 Turbo 2007 - 2009
Porsche 997.2 GT2-RS 2010 - 2013

Diagram ref no 18

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99923054240
99923054240

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Special Order item
99634745231
Product Information
Product Information
Power steering pressure line, for RHD cars.

porsche

Fits:
Porsche 986 Boxster >>2001 RHD cars
Porsche 996 Carrera >>2001 RHD cars , Rear-wheel drive
F             >> 99-4S630 356
F             >> 99-4S603 928
F             >> 99-4S642 725
Porsche 996 GT2 >> 2001 RHD cars
Porsche 996 GT3 1999-04

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Diagram ref no 1

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99634745231

99634745204
99634745231

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Special Order item
99634764354
Product Information
Product Information
Power steering pressure line.

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 2002-05

Click 'Zoom in' for large parts diagram.
Diagram ref no 9

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99634764354
99634764354
99634764353
99634764352

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Special Order item
99734743918
Product Information
Product Information
Power steering return line, center.

porsche

Fits:
Porsche 997.2 Carrera  2009-12
Porsche 997.2 Turbo 2010-13

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Diagram ref no 5

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99734743918
99734743918
99734743917
99734743912
99734743911

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Special Order item
99634745012
Product Information
Product Information
Power steering return line, for RHD cars

porsche

Fits:
Porsche 986 Boxster >>2001 RHD
Porsche 996 Carrera >>2001 RHD, Rear-wheel drive
F             >> 99-4S630 356
F             >> 99-4S603 928
F             >> 99-4S642 725
Porsche 996 Turbo GT2 2001 RHD
Porsche 996 GT3 >>2001 RHD

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

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99634745012
99634745012
99634745008
99634745003

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Special Offer
99634701111P
Product Information
Product Information

Replacement Pipes (Steel) For LHD Steering Rack (Pair)
For Left Hand Drive Cars ONLY!  

Other than buying a completely new steering rack or having your existing steering rack refurbished, which are both very expensive options, we now offer replacement steering rack pipes which are normally not available separately, the two replacement pipes fit to the steering rack, these pipes normally deteriorate. The steering rack of a power-assisted car needs a hydraulic circuit: a pressure line (high pressure) from the power steering pump (or pump + reservoir assembly) to the steering rack, and a return line (low pressure) from the rack back to the reservoir (or pump return side). 


Fits:

  • Porsche Boxster 986 2.5L 1997-99 
  • Porsche Boxster 986 2.7L 1999-02 
  • Porsche Boxster S 986 3.2L 1999-02 
  • Porsche Boxster 986 2.7L 2003-04 
  • Porsche Boxster S 986 3.2L 2003-04 
  •  Porsche 996 C2 3.4L 1997-08/01 
  •  Porsche 996 C4 3.4L 1997-08/01 
  •  Porsche 996 C2 3.6L 09/01-2005 
  •  Porsche 996 C4 3.6L 09/01-2005 
  •  Porsche 996 C4S 3.6L 09/01-2005 
  •  Porsche 996 TURBO 2000-05         


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99634701111P
99634701107
99634701104
99634701106
99634701110
99634701111

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Special Offer
99634701210P
Product Information
Product Information
Replacement Pipes (Steel) For RHD Steering Rack (Pair)
For Right Hand Drive Cars ONLY!  

Other than buying a completely new steering rack or having your existing steering rack refurbished, which are both very expensive options, we now offer replacement steering rack pipes which are normally not available separately, the two replacement pipes fit to the steering rack, these pipes normally deteriorate. The steering rack of a power-assisted car needs a hydraulic circuit: a pressure line (high pressure) from the power steering pump (or pump + reservoir assembly) to the steering rack, and a return line (low pressure) from the rack back to the reservoir (or pump return side). 


Fits:

  • Porsche Boxster 986 2.5L 1997-99
  • Porsche Boxster 986 2.7L 1999-02
  • Porsche Boxster S 986 3.2L 1999-02
  • Porsche Boxster 986 2.7L 2003-04
  • Porsche Boxster S 986 3.2L 2003-04
  • Porsche 996 C2 3.4L 1997-08/01
  • Porsche 996 C4 3.4L 1997-08/01
  • Porsche 996 C2 3.6L 09/01-2005
  • Porsche 996 C4 3.6L 09/01-2005
  • Porsche 996 C4S 3.6L 09/01-2005
  • Porsche 996 TURBO 2000-05  



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99634701210P
99634701208
99634701205
996347012087
99634701210

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Special Order item
99634745229
Product Information
Product Information
Steering rack pressure line, Supply. For RHD cars.

porsche

Fits:
For RHD cars
Porsche 996 2002>> All-wheel drive (M339)

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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99634745229
99634745229
99634745227
99634745225

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Special Order item
99634745027
Product Information
Product Information
Steering rack return line for RHD cars.
porsche

Fits
RHD cars / All-wheel drive (M339)
Porsche 996 C4 / C4S 2002>>
Porsche 996 Turbo 2002>>

Click 'Zoom in' for large parts diagram.
Diagram ref no 2

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99634745027
99634745027
99634745026
99634745025

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Special Order item
99635554300
Product Information
Product Information
Support bracket for solid brake, clutch and power steering lines. 

porsche

Fits:
Porsche 986 Boxster - 1997 to 2004
Porsche 987.1 Boxster - 2005 to 2008
Porsche 987.1 Cayman - 2005 to 2008
Porsche 996 - 1997 to 2005
Porsche 997.1 - 2005 to 2008


Diagram ref no 17



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99635554300
99635554300

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Special Order item
99923055110
Product Information
Product Information
Threaded joint for power steering pipes, NW10

porsche

Fits:
Porsche 996 Carrera 2000-05
F             >> 99-4S630 356
F             >> 99-4S603 928
F             >> 99-4S642 725

Porsche 996 Turbo 2001-05
F             >> 99-4S680 654
F             >> 99-4S670 658
F             >> 99-4S695 107

Porsche 996 GT3 1999-05
F             >> 99-4S691 629

Porsche 997.1 Carrera 2005-08
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2005-08
Porsche 987C.1 Cayman 2006-08

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

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99923055110
99923054010
99923055110

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DISPLAYING 1 to 16 (of 17 products)
1 2
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About Power Steering Pipes / Hoses / Radiators

Porsche Power Steering Pipes, Hoses & Radiators | Design911 Hydraulic Components for Precision Steering

Power steering pipes, hoses, and radiators are vital for maintaining smooth, responsive steering performance in your Porsche. These components transport and cool the hydraulic fluid that powers the steering system, ensuring precise control, minimal resistance, and consistent handling under all driving conditions. A well-maintained hydraulic circuit not only enhances steering feel but also protects your steering pump, rack, and associated components from wear and overheating.

At Design911, we offer an extensive selection of power steering pipes, hoses, and cooling radiators, engineered for exact fitment, reliability, and high-pressure performance. Manufactured using durable materials such as reinforced rubber, stainless steel, and aluminium, our range is ideal for servicing, restoration, and performance upgrades — keeping your Porsche’s steering system operating at its sharpest.

What Do Power Steering Pipes, Hoses & Radiators Do?

Power steering pipes and hoses transfer hydraulic fluid between the pump, rack, and reservoir, while radiators (or coolers) regulate fluid temperature for consistent performance.

Core Functions:
• Deliver hydraulic fluid to assist steering input.
• Maintain consistent pressure within the steering circuit.
• Prevent overheating of steering fluid during high-load use.
• Ensure responsive, effortless steering at all speeds.
• Reduce wear on the pump, seals, and steering rack.

Together, these parts form the backbone of your Porsche’s power steering system, ensuring smooth handling and precise feedback whether on the road or track.

Why Do Power Steering Components Fail or Degrade?

Continuous heat, pressure, and exposure to fluids can cause deterioration of hoses and pipes over time, while radiators may corrode or leak.

Common Causes of Failure Include:
• Cracked or brittle hoses from age or heat exposure.
• Corrosion or pitting in metal pipes.
• Leaks at joints or seals from fluid pressure fluctuations.
• Blocked or damaged steering coolers reducing efficiency.
• Contamination of hydraulic fluid causing internal wear.

When these components fail, drivers may experience stiff steering, fluid leaks, noise, or overheating — all of which can lead to expensive steering system damage if left unaddressed.

Why Replace or Upgrade Your Porsche Power Steering Pipes, Hoses & Radiators?

Replacing or upgrading these components restores safe, consistent hydraulic operation and improves overall steering precision. High-quality materials and modern design offer improved durability, pressure resistance, and corrosion protection.

Key Benefits:
• Restores smooth, consistent steering response.
• Prevents fluid leaks and overheating.
• Extends life of steering pumps and racks.
• Constructed from premium, heat- and pressure-resistant materials.
• Fits Porsche 911, 944, 968, Boxster, Cayman, Cayenne, and Macan models.
• Ideal for restorations, repairs, or performance upgrades.

Design911’s Porsche power steering pipes, hoses, and radiators provide durability, precision, and reliability — ensuring confident handling and performance on every drive.

Highlights

• Premium Porsche power steering hoses, pipes, and cooling radiators.
• Engineered for precision fitment and leak-free performance.
• Reinforced construction for high-pressure durability.
• Corrosion-resistant and temperature-stable materials.
• Suitable for both classic and modern Porsche models.
• Perfect for maintenance, restoration, or upgrades.

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