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.
Hoses / Pipes / Sleeves
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)

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Related, superseded, cross reference or alternative numbers for comparison.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
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

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Related, superseded, cross reference or alternative numbers for comparison.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
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

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Related, superseded, cross reference or alternative numbers for comparison.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
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Fits:
Porsche 911 69-77 MFI
Click 'Zoom in' for large parts diagram.
Diagram ref no 28
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90111029500
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Fits:
Porsche 911 69-77 MFI
Click 'Zoom in' for large parts diagram.
Diagram ref no 29
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PCG11029600
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 69-77 MFI
Click 'Zoom in' for large parts diagram.
Diagram ref no 28
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90111029500
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
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.
- 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
Related, superseded, cross reference or alternative numbers for comparison.
92811015801
The product you are viewing cross references to these numbers
- Porsche 911 1978-1983 3.0L / SC
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
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
Related, superseded, cross reference or alternative numbers for comparison.
92811015801
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
6 required per car

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
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
6 required per car

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
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Diagram ref no 34
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93020724301
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95

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
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Made from high quality silicone rubber with 3 layer polyester reinforcement.

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
The product you are viewing cross references to these numbers
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95

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
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
From intake manifold to control valve for Sportomatic trans clutch release.

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
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
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
Related, superseded, cross reference or alternative numbers for comparison.
90510807500
The product you are viewing cross references to these numbers
-
air cleaner 911 SC 1978-83 106-00
-
k-jetronic I 911 TURBO 930.60/61, 930.62/66 1978-83 107-20
-
k-jetronic III 911 TURBO 1978-83 107-35
-
turbocharging 911 TURBO 1978-83 107-40
-
air cleaner system for - ZENITH carburettor 911 T/E/S UPTO 1971 and 911 T-V 1972 ONWARDS 106-00
-
injection system cylinder head and injection pump 911 E/S UPTO 1971 and 911 911 T-E/E/S, CARRERA 2.7 1972 ONWARDS 107-20
-
vacuum system for clutch release 911 T:SPM UPTO 1971 107-45
-
Vacuum system for clutch release for 911 T-V:SPM 1972 ONWARDS 107-55
-
exhaust system for 911 T/E/S 1972 ONWARDS and 911 T-V, CARRERA 2.7, 911 T-K 1970-73 202-05
-
L-JETRONIC I 911 CARRERA 930.20/25/26 1987-89 107-00
-
K-JETRONIC I 911 TURBO 930.66/68 1987-89 107-20
-
K-JETRONIC III 911 TURBO 930.66/68 1987-89 107-35
-
turbocharging 911 TURBO 930.66/68 1987-89 107-40
-
L-JETRONIC I 911 CARRERA 930.20/21/26 1984-86 107-00
-
K-JETRONIC I 911 TURBO 930.66/68 1984-86 107-20
-
K-JETRONIC III 911 TURBO 930.66/68 1984-86 107-35
-
turbocharging 911 1984-86 107-40
-
Air cleaner k-jetronic 911 1974-77 106-00
-
Mechanical injection right for Model 911/83 1974-77 107-25
-
injection system cylinder head and injection pump for 911 E/S 1969 onwards 107-20
-
vacuum system for clutch release for sportomatic for 911 L/S/TU upto 1968 and 911 T 1969 ONWARDS 107-30
-
Mixture control unit, air cleaner 911 TURBO 1975-77 107-00
-
K - JETRONIC 911 TURBO 1975-77 107-05
-
turbocharger and wastegate 911 TURBO 1975-77 202-20
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.