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Heater hoses & pipes
- 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)
This heating tube inside sill is a high-quality replacement air-duct tube designed to channel warm air from the exhaust-heated heating system through the sill area of classic Porsche 911 models built from 1969 through 1989 and 356 B/C models. It matches the original part’s fit and performance to maintain proper heating airflow in your vehicle’s cabin.
Fits:
Porsche 356 B/C 1.6 01/1959 - 12/1965
Porsche 911 2.0-3.3 08/1968 - 07/1989
Porsche 912 1.6 01/1965 - 02/1970
Porsche 914 1.7-2.0 01/1969 - 07/1974
Diagram ref no 15
The heating tube directs hot air generated by the engine’s exhaust-heated heat exchangers into the cabin area via the sill ducting. This ensures your classic Porsche’s heater system distributes warmth effectively, improving defogging, defrosting, and passenger comfort in cooler weather.
Function: Installed along the inner sill section, this tube captures heat from the heater system and delivers it through the duct network into the footwell or cabin air distribution points. A properly functioning heater tube helps maintain consistent cabin temperature and prevents heat loss due to damage or age-related degradation of the original ducting.
Over decades of use, original heater tubes can become cracked, brittle, or collapsed, leading to poor airflow, heat loss, or even exhaust gas intrusion into the cabin air system. Replacing the deteriorated tube with an OE Match unit restores effective hot-air distribution, improves cabin comfort and heater efficiency, and keeps the vintage heating system functioning as intended.
Replace this heating tube when you notice:
• Weak or inconsistent warm air delivery from the heater
• Deteriorated, cracked, or collapsed heater tubing
• Excessive heat loss before reaching the cabin
• Unusual smells from heater ducts (possible leaks)
• During full heater system or sill restoration work
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91157202502
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)
- 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)
Fits:
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951214502
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
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1975-1977 3.0L Turbo (930)
Sold each - 4 required per car
Fits:
Porsche 911 - 1965 to 1968
Click 'Zoom in' for large parts diagram.
Diagram ref no 43
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951205202
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
Sold Each.
x2 Required Per Car.
Fits:
Porsche 911 / 912 1970>>1989
Diagram Ref No 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157134532
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)
- 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)
Fits:
For RHD cars
Porsche 911 1977-89
Porsche 911 Turbo 1977
Diagram ref no 15
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91157108601
The product you are viewing cross references to these numbers
- 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)

Fits:
Porsche 911 Carrera 3.2L 1984-89
Click 'Zoom in' for large parts diagram.
Diagram ref no 7.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93021132301
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 1970-76
Porsche 911 Turbo 1975-89
Porsche 914-6 1970-76
Porsche 964 Turbo 1991-94
Click 'Zoom in' for large parts diagram.
Diagram ref no 7.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110682700
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
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 914 (1970-1976)

Fits:
Porsche 911 1969-89
Porsche 914-6 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110633100
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)
- 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 914 (1970-1976)
Fits:
Porsche 911 1968-73
Porsche 911 TURBO 3.0L / 3.3L 1975-89
Porsche 914-6 1970-76
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010632102
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)
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
Fits:
Porsche 911 1968-73
Porsche 911 TURBO 3.0L / 3.3L 1975-89
Porsche 914-6 1970-76
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010632102
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)
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)

Fits:
Porsche 911 1970-77
Porsche 911 TURBO 3.0L / 3.3L 1975-89
Porsche 964 TURBO 3.3L / 3.6L 1991-94
Porsche 914-6 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 5
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110632700
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
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 914 (1970-1976)

Fits:
Porsche 911 / 912 1965-89
Porsche 930 1975-89
Porsche 914 1970-76
Click 'Zoom in' for large parts diagram.
Diagram ref no 14
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91457212310
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)
- 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 914 (1970-1976)
Sold each - 2 required per car
Fits:
Porsche 911 - 1965 to 1968
Section of diagram ref no 24
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90157291120
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
OE Porsche numbers: 90157204122, 90157204222, 99970204050.
Fits:
Porsche 911/912 (1965-68)
Diagram ref no 22 and 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PP221D
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
Sold each - 2 required per car.
Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Diagram ref no 22
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93021133904
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Sold Each, x2 Required Per Car.
Fits:
Porsche 911 3.2L Carrera 1984>>1989
Diagram Ref No 22
Related reference numbers
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93021133904
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
-
air duct 911 1978-83 105-05
-
frame centre 911 1978-83 801-10
-
air duct and engine cover 911 1970-73 105-05
-
ventilation heating system - 1 - 911 1978-83 813-00
-
air duct 911 1987-89 105-05
-
additional blower 911 CARRERA 930.20/25/26 1987-89 108-10
-
exhaust system 911 CARRERA 930.20/25/26 1987-89 202-05
-
frame centre 911 1987-89 801-10
-
Frame centre rear 911 1970-73 801-15
-
Air duct 911 1984-86 105-05
-
Additional blower 911 CARRERA 930.20/21/26 1984-86 108-10
-
Exhaust system 911 CARRERA 1984-86 202-05
-
ventilation heating system - 2 - 911 1987-89 813-01
-
ventilation heating system - 1 - 911 1984-86 813-00
-
ventilation heating system - 2 - 911 1984-86 813-01
-
additional blower 911 1984-86 813-02
-
frame centre 911 1984-86 801-10
-
Ventilation and heating 911 1970-73 813-00
-
Air Duct 911 1974-77 105-05
-
Frame centre 911 1974-77 801-10
-
Ventilation heating system - 1 - 911 UPTO 1976 813-00
-
ventilation heating system - 2 - 911 1977 ONWARDS 813-05
-
air duct and engine cover 911 1965-69 105-05
-
frame centre rear 911 1965-69 801-15
-
interior equipment Rear 911 1965-69 807-05
-
ventilation heating 911 upto 1968 813-00
-
ventilation heatin 911 1969 onwards 813-15
-
air duct 911 TURBO 1975-77 105-05
-
frame centre 911 TURBO 1975-77 801-10
-
ventilation heating system - 1 - 911 TURBO upto 1976 813-00
-
ventilation heating system - 2 - 911 TURBO 1977 onwards 813-05
-
additional blower 911 TURBO 1983 onwards 813-02
-
additional blower, air duct 911 CARRERA M 63 SPEEDSTER 1978-89 813-02
Porsche Heater Hoses & Pipes | Reliable Coolant Flow & Cabin Heating Efficiency
Heater hoses and pipes are essential components in your Porsche’s heating and cooling system. They carry heated coolant from the engine to the heater core, enabling warm air circulation throughout the cabin. Without properly functioning hoses and pipes, the heating system cannot deliver consistent temperature control or maintain efficient engine cooling.
At Design911, we supply premium heater hoses and coolant pipes that meet or exceed original engineering standards. Constructed from high-quality rubber, aluminium, or reinforced composite materials, these components ensure leak-free performance, excellent heat resistance, and long-term durability.
Whether you’re restoring a classic 911 or maintaining a modern Porsche with advanced climate control systems, our heater hoses and pipes provide the precision, fitment, and performance required for dependable heating and cooling.
What Do Heater Hoses & Pipes Do?
Heater hoses and pipes form the circulation path that carries hot coolant from the engine to the heater core, allowing the HVAC system to provide warm air inside the cabin.
Core Functions:
- Transfer heated coolant to the heater core for cabin warming.
- Maintain proper coolant flow between engine and heating system.
- Regulate temperature and prevent air pockets in the system.
- Ensure efficient heat exchange for passenger comfort.
- Protect against coolant loss and overheating.
A properly functioning set of hoses and pipes is critical for both engine cooling performance and interior heating efficiency.
Why Do Heater Hoses & Pipes Fail or Degrade?
These components endure constant heat, pressure, and vibration. Over time, material fatigue and corrosion can lead to leaks or blockages.
Common Causes of Failure Include:
- Age-related cracking, swelling, or brittleness of rubber hoses.
- Corrosion or pinhole leaks in metal pipes.
- Coolant contamination or chemical degradation.
- Loose or damaged hose clamps causing leaks.
- Blockages from scale or debris restricting coolant flow.
When heater hoses or pipes fail, symptoms include coolant leaks, weak cabin heat, overheating, or a sweet smell of antifreeze inside the cabin.
Why Replace Your Porsche Heater Hoses & Pipes?
Replacing worn or damaged heater hoses and pipes restores proper coolant circulation, prevents leaks, and ensures stable heating and engine temperature control.
Key Benefits:
- Restores efficient coolant flow and cabin heating performance.
- Prevents leaks, overheating, and engine damage.
- Improves reliability and system pressure integrity.
- Resistant to heat, pressure, and corrosion for long lifespan.
- Direct-fit replacements for Porsche 911, Cayman, Boxster, Panamera, Macan, and Cayenne models.
- Ideal for maintenance, restorations, or performance upgrades.
It’s recommended to replace heater hoses and clamps during coolant service intervals to maintain maximum system reliability.
Highlights
- Precision-engineered Porsche heater hoses and coolant pipes.
- Constructed from high-quality, heat-resistant materials.
- Direct-fit replacements for Porsche models old and new.
- Designed for long-term resistance to pressure and corrosion.
- Ensures reliable heating and engine cooling performance.
- Ideal for restoration, servicing, and preventative maintenance.