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Porsche // 944 (1982-1991) // 944 Turbo 2.5L 8V 1989-91
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Air Pressure Hose. Porsche 997 Turbo / GT2 2007-09 - 99711064
99711064
Vehicle Group
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Information
Air Pressure Hose.
Upgrade or replace the high-pressure charge-air hose on your Porsche 911 (997-series) Turbo/GT2 with these genuine OEM components. The left/upper hose is Part 99711064403 and the right/upper one is Part 99711064503. These hoses carry compressed, cooled air from the intercooler outlet to the Y-pipe/intake manifold, ensuring your engine receives the designed boost volume. If you’ve experienced loss of power, hear hissing under load, or notice boost irregularities, these direct-fit Porsche parts restore the integrity of your forced induction system.
Fits:
Diagram Ref No 4
What This Product Does:
Symptoms & Signs You Might Need Replacement:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99711064
The product you are viewing cross references to these numbers
Upgrade or replace the high-pressure charge-air hose on your Porsche 911 (997-series) Turbo/GT2 with these genuine OEM components. The left/upper hose is Part 99711064403 and the right/upper one is Part 99711064503. These hoses carry compressed, cooled air from the intercooler outlet to the Y-pipe/intake manifold, ensuring your engine receives the designed boost volume. If you’ve experienced loss of power, hear hissing under load, or notice boost irregularities, these direct-fit Porsche parts restore the integrity of your forced induction system.
Fits:
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Diagram Ref No 4
What This Product Does:
- These hoses/pipes are part of the charge-air system (after the turbocharger) and connect components like the turbo(s) → intercooler(s) → intake manifold(s). They carry compressed air at elevated pressure and temperature.
- The purpose: When the turbo compresses intake air, it gets hot; after the intercooler it is cooled, then routed via these hoses to the engine. Secure, leak-free hoses ensure the engine receives correct volume and pressure of air.
- If the hose is compromised (e.g., leak, crack, split), then boost pressure drops, the engine may lose power, run richer/leaner, trigger fault codes, and the car’s performance degrades.
Symptoms & Signs You Might Need Replacement:
- Loss of boost / reduced power: If you’re not getting full boost, or turbo seems slower to build, a leak in this hose is a common fault.
- Hissing or whistling noise during acceleration (especially under load) — indicates air escaping from pressure side of the system.
- Check Engine Light / fault codes relating to boost pressure, turbocharger performance or intake air pressure.
- Visible damage or wear: cracks, splits, swelling, hose soft spots, or hose clamps loose or missing.
- Oil or dirt buildup around the hose connection points — may suggest a leaking pressure hose has allowed contaminants in.
- Restores correct performance: For a turbocharged 911, accurate boost pressure and charge-air delivery are critical for performance. A failing hose disrupts that.
- Prevents further damage: A leaking charge air hose can lead to incorrect air/fuel mixture, cause lean conditions, increase exhaust temps, or stress the turbo/intercooler system.
- Safety & drivability: A compromised hose might fail catastrophically under boost, leading to a sudden loss of power, which could be dangerous in certain driving conditions.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99711064
99711064403
99711064503
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Prices from: £123.27
Related products
Vehicle Group
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Information
Turbocharger Shut-off Valve.
Fits:
Porsche 964 Turbo 1991-94
Porsche 993 Turbo 1995-98
Porsche 996 Turbo / GT2 2001-05
Porsche 944 Turbo 1985-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 25
Related reference numbers
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99311033751
The product you are viewing cross references to these numbers
Fits:
Porsche 964 Turbo 1991-94
Porsche 993 Turbo 1995-98
Porsche 996 Turbo / GT2 2001-05
Porsche 944 Turbo 1985-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 25
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99311033751
99311033751
99311033750
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Price: £196.76
Orderable
Vehicle Group
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Information
Intake boot - Intercooler pipe to throttle valve.
Fits:
Porsche 944 TURBO 1986-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
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95111037201
The product you are viewing cross references to these numbers
Fits:
Porsche 944 TURBO 1986-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 9
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95111037201
95111037201
847603075413
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Price: £65.52
Orderable
Vehicle Group
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Information
Intercooler hose clamp. 78 x 9.
Fits:
Porsche 944 2.5L Turbo 1985-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
Related reference numbers
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PCG51200603
The product you are viewing cross references to these numbers
Fits:
Porsche 944 2.5L Turbo 1985-91
Click 'Zoom in' for large parts diagram.
Diagram ref no 10
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PCG51200603
PCG51200603
PCG51200602
99951200602
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Price: £13.63
In stock
Vehicle Group
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Information
Standard replacement turbocharger.
BorgWarner ref no 53269887042
Fits:
Porsche 944 Turbo / Turbo S (Engine: 951) From 01/01/1989
REPLACEMENT
These turbos are a direct installation in replacement of your factory turbos.
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951123131EX
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BorgWarner ref no 53269887042
Fits:
Porsche 944 Turbo / Turbo S (Engine: 951) From 01/01/1989
REPLACEMENT
These turbos are a direct installation in replacement of your factory turbos.
Related reference numbers
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951123131EX
53269887042
95112313103
95112313105
951123131EX
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Price: £1,473.00
Orderable