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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://d911api.datadial.net/images/schemaLogo.png https://d911api.datadial.net/images/schemaLogo.png +443456003478 https://d911api.datadial.net Facebook Instagram

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DISPLAYING 33 to 48 (of 49 products)
1 2 3 4
DO88-KIT142S
Product Information
Product Information
Silicone K-Jetronic hose kit. Made from high quality silicone rubber with 3 layer polyester reinforcement.

doeighteight

To Fit:
Porsche 911 (930 Turbo) 1978 to 1989 all models with 3.3L Turbo engine

Hoses included:
• Y-connection on lower intake manifold / Valve on upper intake manifold - OEM ref 99918128450
• Vacuum limiter / Upper intake manifold - OEM ref 93011017101
• Vacuum limiter / Y-connection on lower intake manifold - OEM ref 99923900740
• Connection on lower intake manifold / Brake vacuum - OEM ref 99923901140
• Auxiliary air regulator / Throttle body - OEM ref 93011033500 / 93011033503
• Auxiliary air regulator / Air filter box - OEM ref 99923900940

Please refer to the product images for confirmation of position of the hoses.

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Related, superseded, cross reference or alternative numbers for comparison.

DO88-KIT142S
99918128450
93011017101
99923900740
99923901140
93011033503
93011033500
99923900940
PCG239094A

The product you are viewing cross references to these numbers
Special Order item
91111029502
Product Information
Product Information
Pre-heat hose, Heat exchanger to engine tin. 24mm x 400mm.

porsche

Fits:
Porsche 911 1972-73

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

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Related, superseded, cross reference or alternative numbers for comparison.

91111029502
91111029502
1623500700

The product you are viewing cross references to these numbers
91111029502/1
Product Information
Product Information
Preheater hose from heat exchanger to engine tin, 24x400 mm

dansk

Fits:
Porsche 911 1972-73

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

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Related, superseded, cross reference or alternative numbers for comparison.

91111029502
91111029502
1623500700

The product you are viewing cross references to these numbers
Special Order item
90111029500
Product Information
Product Information
Pre-heat pipe, Inner, 25 X 560 mm for cars with mechanical injection.

porsche

Fits:
Porsche 911 69-77 MFI

Click 'Zoom in' for large parts diagram.
Diagram ref no 28

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

90111029500
90111029500

The product you are viewing cross references to these numbers
Special Order item
PCG11029600
Product Information
Product Information
Pre-heat pipe, Outer, for cars with mechanical fuel injection.

porsche

Fits:
Porsche 911 69-77 MFI

Click 'Zoom in' for large parts diagram.
Diagram ref no 29

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

PCG11029600
PCG11029600

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Best Price
90111029500/1
Product Information
Product Information
Pre-heat pipe, Inner, 25 X 580 mm for cars with mechanical injection.

oematch

Fits:
Porsche 911 69-77 MFI

Click 'Zoom in' for large parts diagram.
Diagram ref no 28

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90111029500
90111029500
911223-091
911223-091

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Special Order item
92811015801
Product Information
Product Information
Rubber sleeve for air intake.
The Porsche Rubber Sleeve for Air Intake is a genuine OEM replacement part designed to provide a secure, airtight connection within the air intake system. Used on classic Porsche 928 (1978–1984) and select 911 SC (1978–1979) models, this rubber sleeve links rigid intake components while absorbing vibration and movement.
Sold individually, 6 or 8 required per vehicle - depending on vehicle model

Fits:
Porsche 911 SC 1978 - 1983 
Porsche 928 4.5L 1978 - 1979 with Engine type: 2801

Porsche 928 4.7L 1983 - 1984
 with Engine type: 2819, 2820  * USA, Canada, Japan models Only

Diagram ref no 10 (for 911) or 37 (for 928)

The rubber sleeve acts as a seal and flexible hose between rigid parts of the intake system (for example between the airbox, intake manifold, or distributor, depending on configuration). It ensures air travels properly without leaks.

Symptoms Of A Worn Out Sleeve:

  • Rough idle or uneven running — because air is leaking in (unmetered air), messing up the mixture.
  • Hissing or whistling sounds from under the hood, particularly around where the sleeve is located.
  • Hard starting or hesitation when accelerating, especially if the leak affects air flow under load.
  • Reduced performance or lack of throttle response.
  • Possibly engine warning lights / codes related to airflow, air/fuel mixture, or vacuum leaks.

Why Replacement Matters:
  • Prevents air leaks which can lead to rich or lean mixtures, poor throttle response, lower fuel efficiency, and possible engine damage over time.
  • Helps maintain smooth running and reliability of older Porsche engines, where leaks or perished rubber hoses are common weak points.
  • Preserves engine health by ensuring the correct air/fuel ratio. Unmetered air can contribute to detonation or stress on components.
  • Maintains OEM specification — using a correctly sized, good-quality rubber sleeve helps ensure fit, sealing, and durability.



Related reference numbers
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92811015801
92811015801
92811015800

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Best Price
92811015801/1
Product Information
Product Information
Rubber sleeve for air intake.
This sleeve joins intake components and prevents unmetered air leaks. A proper seal supports correct air-fuel mixture control, smooth running, and reliable performance.
Sold individually, 6 or 8 required per vehicle - depending on vehicle model

Fits:
Porsche 911 SC 1978 - 1983 
Porsche 928 4.5L 1978 - 1979 with Engine type: 2801

Porsche 928 4.7L 1983 - 1984
 with Engine type: 2819, 2820
  * USA, Canada, Japan models Only

Diagram ref no 10 (for 911) or 37 (for 928)

Installed between intake pipes/ducting components, the sleeve absorbs vibration and minor movement while keeping the intake tract sealed. It helps protect against vacuum leaks that can cause rough idle, hesitation, or fault codes.

Aging intake rubber can crack, harden, or split from heat and oil vapours, leading to air leaks and unstable engine running. Replacing worn sleeves restores proper sealing, helping maintain correct airflow measurement and drivability.

When to replace:
Visible cracks, splits, or swelling in the rubber
 Loose fitment or air leaks at the coupling points
 Rough idle, hesitation, or lean-running symptoms (after inspection)
 During intake service or when replacing adjacent intake hoses/boots
 Excessive hardening or deterioration from heat/oil exposure



Related reference numbers
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92811015801
92811015801
92811015800

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Best Price
91111088502/1
Product Information
Product Information
Rubber sleeve inlet manifold. 
6 required per car

oematch

Fits:
Porsche 911 / 911S - 1974 to 1977

For cars with K-Jetronic fuel injection

Click 'Zoom in' for large parts diagram.
Diagram ref no 8



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

91111088502
91111088502
911 110 885 02

The product you are viewing cross references to these numbers
Special Order item
91111088502
Product Information
Product Information
Rubber sleeve inlet manifold. 
6 required per car

porsche

Fits:
Porsche 911 / 911S - 1974 to 1977

For cars with K-Jetronic fuel injection

Click 'Zoom in' for large parts diagram.
Diagram ref no 8



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

91111088502
91111088502

The product you are viewing cross references to these numbers
Special Order item
93020724301
Product Information
Product Information
Rubber sleeve restrictor valve. 

Fits:
Porsche 911 3.2 Carrera - 1984 to 1989

Diagram ref no 34



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

93020724301
93020724301

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CLAMP-KIT145
Product Information
Product Information
Stainless steel clamp kit for Turbo inlet hose kit

doeighteight

To Fit:
For Turbo inlet hose kit #DO88-KIT145S
Porsche 911 (930 Turbo) 1978-1989 with 3.3 Litre Turbo engine

Kit of 6 clamps

The kit contains all necessary hose clamps to install the specified hose kit. The included clamps are a high quality standard design type in all stainless steel (W4 class) with a stamped band to minimize impact on hose surface.

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

CLAMP-KIT145
93011013702
93011015801
93011015801

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DO88-KIT144S
Product Information
Product Information
Silicone turbo vacuum hose kit.
Made from high quality silicone rubber with 3 layer polyester reinforcement.

doeighteight

To Fit:
Porsche 911 (930 Turbo) 1978-1989 with 3.3 Litre Turbo engine


Hoses included:
• Wastegate hose, OEM ref 99923903440
• Warm-up valve / Air filter box, OEM ref 99923900640 / 99923903440
• Warm-up valve / T-connection on throttle body, OEM ref 99923901340
• T-connection on throttle body / Vacuum limiter, OEM ref 99923901340

Please refer to the product images for confirmation of position of the hose.

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

DO88-KIT144S
99923903440
99923903440
99923900640
99923901340
99923901340

The product you are viewing cross references to these numbers
CLAMP-KIT144
Product Information
Product Information
Turbo vacuum hoses clamp kit.

doeighteight

To Fit:
For Turbo vacuum hose kit #DO88-KIT144S
Porsche 911 (930 Turbo) 1978-1989 with 3.3 Litre Turbo engine

Kit of 8 clamps

The kit contains all necessary hose clamps to install the specified hose kit. The included clamps are a high quality standard design type in all stainless steel (W4 class) with a stamped band to minimize impact on hose surface.

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

CLAMP-KIT144
99923903440
99923903440
99923900640
99923901340
99923901340

The product you are viewing cross references to these numbers
Special Order item
90510807500
Product Information
Product Information
Vacuum control hose for clutch.
From intake manifold to control valve for Sportomatic trans clutch release.

porsche

Fits:
Porsche 911 1967-1968 w/ Sportomatic transmission
Porsche 911 1969-1972 Sportomatic

Click 'Zoom in' for large parts diagram.
Diagram ref no 14

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

90510807500
90510807500
012756

The product you are viewing cross references to these numbers
Best Price
90510807500/1
Product Information
Product Information
Vacuum control hose for clutch.
From intake manifold to control valve for Sportomatic trans clutch release.

Fits:
Porsche 911 1967-1968 w/ Sportomatic transmission
Porsche 911 1969-1972 Sportomatic

Diagram ref no 14

Related reference numbers
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90510807500
90510807500

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DISPLAYING 33 to 48 (of 49 products)
1 2 3 4
Also found on these pages
About Hoses / Pipes / Sleeves

Air Inlet Hoses, Pipes & Sleeves – Durable Intake Components for Porsche Performance

Air inlet hoses, pipes, and sleeves are essential components of your Porsche’s intake system, connecting the air filter housing, throttle body, turbocharger, and intercooler. They ensure a smooth and sealed flow of air into the engine, supporting efficient combustion, responsive acceleration, and consistent performance.

At Design911, we supply a full range of genuine and high-quality air inlet hoses, pipes, and sleeves for numerous Porsche models that include 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each component is engineered for precision fitment, heat resistance, and airflow stability — helping your Porsche deliver the performance and reliability it’s known for.

What Do Air Inlet Hoses, Pipes & Sleeves Do?

These components channel filtered air through the intake system to the engine’s combustion chambers. Their main functions include:

  • Maintaining airtight airflow between intake components.
  • Reducing turbulence and air loss for improved throttle response.
  • Supporting optimal air pressure for turbocharged and naturally aspirated engines.
  • Protecting against contaminants that can reduce performance or cause engine wear.

In turbocharged Porsche models, these parts also help manage boost pressure, making them crucial to both efficiency and power delivery.

Why Do Air Inlet Hoses, Pipes & Sleeves Fail?

Due to their constant exposure to heat, vibration, and engine movement, air inlet components can deteriorate over time. Common causes of failure include:

  • Cracking or splitting from heat cycles and material fatigue.
  • Oil or fuel vapor contamination softening the rubber or plastic.
  • Loose or damaged clamps causing vacuum or boost leaks.
  • Age-related hardening leading to brittle connections.
  • Excessive boost pressure stressing the hose in performance applications.

Symptoms of failure include hissing or whistling noises, loss of boost pressure, poor throttle response, rough idling, or a check engine light caused by airflow irregularities.

Why Replace Worn Air Inlet Components?

A leaking or damaged inlet hose can cause unmetered air to enter the engine, resulting in incorrect fuel-air ratios, poor performance, or even turbocharger strain. Replacing worn or cracked hoses and pipes ensures proper airflow, efficient combustion, and reliable performance.

Benefits of replacement include:

  • Restored air pressure and engine response.
  • Improved turbo efficiency and power delivery.
  • Enhanced fuel economy and reduced emissions.
  • Long-term reliability with manufacturer-quality materials.

All hoses, pipes, and sleeves available at Design911 are crafted from high-temperature silicone, reinforced rubber, or aluminium alloys for superior sealing, flexibility, and strength — ensuring dependable performance under demanding conditions.

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