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Porsche // 944 (1982-1991) // 944S 2.5L 16V 1987-88
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Exhaust valve guide. Porsche 996 Carrera 3.4L & 3.6L / Boxster 986 2.7L & 3.2L - 99610414503
99610414503
Vehicle Group
- 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
Information
Valve guide - Exhaust
The Genuine Porsche 99610414503 exhaust valve guide is an OE cylinder head component for selected Porsche 996 3.4L / 3.6L and 986 Boxster 2.7L / 3.2L engines. It guides the exhaust valve stem, supports correct valve movement and helps restore factory valve train function during cylinder head repair or engine rebuild work.
Sold individually
Fits:
Porsche 996 Carrera 3.4L 1997 - 2001 (Engine code: 9601 / 9602 / 9604)
Porsche 996 Carrera 3.6L 2002 - 2005 (Engine code: 9603)
Porsche 986 Boxster 2.7L 2002 - 2004 (Engine code: 9623)
Porsche 986 Boxster 3.2L 2002 - 2004 (Engine code: 9624)
Diagram Ref No 4
This part is used during cylinder head repair, valve train service or engine rebuild work on selected Porsche flat-six engines.
What This Part Does / Functions
• Guides the exhaust valve stem within the cylinder head
• Helps maintain correct exhaust valve alignment
• Supports smooth valve opening and closing
• Helps control valve stem movement and wear
• Works with the valve stem seal to help control oil consumption
• Supports correct valve seating and combustion sealing
• Replaces a worn, loose, damaged or out-of-specification valve guide
• Provides correct OE Porsche material, dimensions and fitment.
Why Replace This Part?
Exhaust valve guides are exposed to high exhaust temperatures, valve movement, combustion heat and long-term engine wear. Over time, the guide can wear internally, allowing excess valve stem movement. Worn valve guides may contribute to oil consumption, exhaust smoke, poor valve sealing, valve train noise or reduced engine performance. Replacing the guide with a Genuine Porsche OE exhaust valve guide helps restore correct valve stem support and factory cylinder head specification during engine repair or rebuild work.
Common Symptoms of Worn Valve Guides
• Excessive oil consumption
• Blue smoke from the exhaust
• Worn or loose exhaust valve movement
• Poor valve sealing or compression issues
• Valve train noise
• Carbon build-up around exhaust valves
• Failed cylinder head inspection
• Engine rebuild requiring valve guide renewal.
When to Replace This Part
• During cylinder head overhaul
• During engine rebuild or top-end repair
• If the exhaust valve guide is worn beyond tolerance
• If valve stem-to-guide clearance is excessive
• If the guide is cracked, loose or damaged
• When replacing exhaust valves and related valve train parts
• If oil consumption or exhaust smoke is traced to worn guides
• When restoring the engine with Genuine Porsche OE components.
Where It Fits on the Car
This valve guide is fitted inside the engine cylinder head, in the exhaust valve guide bore. It supports the exhaust valve stem and works with the valve, valve spring, valve stem seal and cylinder head seat. Installation requires specialist cylinder head equipment and machining procedures. Valve guide replacement should be carried out by an experienced engine builder or Porsche specialist.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610414503
The product you are viewing cross references to these numbers
The Genuine Porsche 99610414503 exhaust valve guide is an OE cylinder head component for selected Porsche 996 3.4L / 3.6L and 986 Boxster 2.7L / 3.2L engines. It guides the exhaust valve stem, supports correct valve movement and helps restore factory valve train function during cylinder head repair or engine rebuild work.
Sold individually
Fits:
Porsche 996 Carrera 3.4L 1997 - 2001 (Engine code: 9601 / 9602 / 9604)
Porsche 996 Carrera 3.6L 2002 - 2005 (Engine code: 9603)
Porsche 986 Boxster 2.7L 2002 - 2004 (Engine code: 9623)
Porsche 986 Boxster 3.2L 2002 - 2004 (Engine code: 9624)
Diagram Ref No 4
This part is used during cylinder head repair, valve train service or engine rebuild work on selected Porsche flat-six engines.
What This Part Does / Functions
• Guides the exhaust valve stem within the cylinder head
• Helps maintain correct exhaust valve alignment
• Supports smooth valve opening and closing
• Helps control valve stem movement and wear
• Works with the valve stem seal to help control oil consumption
• Supports correct valve seating and combustion sealing
• Replaces a worn, loose, damaged or out-of-specification valve guide
• Provides correct OE Porsche material, dimensions and fitment.
Why Replace This Part?
Exhaust valve guides are exposed to high exhaust temperatures, valve movement, combustion heat and long-term engine wear. Over time, the guide can wear internally, allowing excess valve stem movement. Worn valve guides may contribute to oil consumption, exhaust smoke, poor valve sealing, valve train noise or reduced engine performance. Replacing the guide with a Genuine Porsche OE exhaust valve guide helps restore correct valve stem support and factory cylinder head specification during engine repair or rebuild work.
Common Symptoms of Worn Valve Guides
• Excessive oil consumption
• Blue smoke from the exhaust
• Worn or loose exhaust valve movement
• Poor valve sealing or compression issues
• Valve train noise
• Carbon build-up around exhaust valves
• Failed cylinder head inspection
• Engine rebuild requiring valve guide renewal.
When to Replace This Part
• During cylinder head overhaul
• During engine rebuild or top-end repair
• If the exhaust valve guide is worn beyond tolerance
• If valve stem-to-guide clearance is excessive
• If the guide is cracked, loose or damaged
• When replacing exhaust valves and related valve train parts
• If oil consumption or exhaust smoke is traced to worn guides
• When restoring the engine with Genuine Porsche OE components.
Where It Fits on the Car
This valve guide is fitted inside the engine cylinder head, in the exhaust valve guide bore. It supports the exhaust valve stem and works with the valve, valve spring, valve stem seal and cylinder head seat. Installation requires specialist cylinder head equipment and machining procedures. Valve guide replacement should be carried out by an experienced engine builder or Porsche specialist.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610414503
99610411560
99610414501
99610414503
The product you are viewing cross references to these numbers
Price: £89.91
Orderable
Related products
Vehicle Group
- Porsche 944S 2.5L 16V 1987-88
Information
Valve Spring.
Fits:
Porsche 944S 2.5L 1987-89
Click picture for large parts diagram.
Diagram Ref No 16.
Fits:
Porsche 944S 2.5L 1987-89
Click picture for large parts diagram.
Diagram Ref No 16.
Price: £35.51
Orderable
Vehicle Group
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Information
Engine Cylinder Head Inlet Valve.
The OE Match Engine Cylinder Head Inlet Valve is a high-quality replacement valvetrain component designed to regulate the flow of air and fuel into the engine's combustion chamber. Manufactured to OE specifications for fit, precision and durability, this inlet valve is essential for maintaining efficient engine breathing, combustion performance and overall engine reliability.
Fits:
Diagram Ref No 9
Produced from high-strength, heat-resistant materials, the inlet valve is engineered to withstand constant operation and repeated opening and closing cycles. Working alongside the camshaft, valve springs, valve guides and cylinder head assembly, it ensures the precise delivery of the air-fuel mixture required for efficient combustion and optimum engine performance.
What This Product Does:
Symptoms Of Wear Or Failure:
Why Replacement Matters:
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810540902
The product you are viewing cross references to these numbers
The OE Match Engine Cylinder Head Inlet Valve is a high-quality replacement valvetrain component designed to regulate the flow of air and fuel into the engine's combustion chamber. Manufactured to OE specifications for fit, precision and durability, this inlet valve is essential for maintaining efficient engine breathing, combustion performance and overall engine reliability.
Fits:
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Diagram Ref No 9
Produced from high-strength, heat-resistant materials, the inlet valve is engineered to withstand constant operation and repeated opening and closing cycles. Working alongside the camshaft, valve springs, valve guides and cylinder head assembly, it ensures the precise delivery of the air-fuel mixture required for efficient combustion and optimum engine performance.
What This Product Does:
- Controls the intake of air and fuel into the combustion chamber.
- Opens and closes in precise timing with engine operation.
- Maintains an effective seal during the compression and combustion cycles.
- Supports efficient airflow and engine breathing.
- Helps maximise engine power and responsiveness.
- Contributes to fuel efficiency and emissions control.
- Forms a critical part of the engine valvetrain system.
Symptoms Of Wear Or Failure:
- Reduced engine power and performance.
- Rough idle or uneven engine operation.
- Engine misfires.Poor throttle response.
- Increased fuel consumption.
- Low compression in the affected cylinder.
- Difficulty starting the engine.
- Ticking or tapping noises from the cylinder head.
- Engine management warning lights or fault codes.
- Failed compression or leak-down test results.
Why Replacement Matters:
- Inlet valves are subjected to continuous operation and must withstand high temperatures, combustion pressures and constant airflow. Over time, valves can become worn, bent, burnt, carbon-contaminated or develop sealing issues that reduce their effectiveness and compromise engine performance.
- A damaged inlet valve can restrict airflow into the combustion chamber, resulting in poor combustion efficiency, reduced power output and increased fuel consumption. If left unresolved, valve-related problems can contribute to compression loss and cause further damage to valve seats, cylinder heads and other internal engine components.
- Replacing a worn or damaged inlet valve restores proper airflow, improves combustion efficiency and helps maintain optimal engine performance. An OE Match replacement provides factory-style fitment, precision manufacturing and long-term durability, ensuring reliable operation and helping protect your Porsche engine from premature wear and costly repairs.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810540902
92810540902
928.105.409.02
1868.002
92810540903
The product you are viewing cross references to these numbers
Price: £24.00
In stock
Vehicle Group
- 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 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Information
Valve stem seals. Price shown is for each.
Fits:
Porsche 911 1968-89 (12 Per Engine)
Porsche 924S (8 Per Engine)
Porsche 944 (8 Per Engine)
Porsche 944 2.7L (8 Per Engine)
Porsche 964 3.6L (12 Per Engine)
Porsche 964 Turbo (12 Per Engine)
Porsche 928 (16 Per Engine)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 19.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410411107
The product you are viewing cross references to these numbers
Fits:
Porsche 911 1968-89 (12 Per Engine)
Porsche 924S (8 Per Engine)
Porsche 944 (8 Per Engine)
Porsche 944 2.7L (8 Per Engine)
Porsche 964 3.6L (12 Per Engine)
Porsche 964 Turbo (12 Per Engine)
Porsche 928 (16 Per Engine)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 19.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410411107
92810419312
92810419313
91110419300
91110419303
92810419308
96410411107
96410411106
The product you are viewing cross references to these numbers
Price: £10.92
In stock
Vehicle Group
- 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 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Information
Valve stem seals. Porsche 911/ 924/944/964
EACH
Fits:
Porsche 911 1968-89 (12 Per Engine)
Porsche 924S (8 Per Engine)
Porsche 944 (8 Per Engine)
Porsche 944 2.7L (8 Per Engine)
Porsche 964 3.6L (12 Per Engine)
Porsche 964 Turbo (12 Per Engine)
Porsche 928 (16 Per Engine)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 19.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410411107
The product you are viewing cross references to these numbers
EACH
Fits:
Porsche 911 1968-89 (12 Per Engine)
Porsche 924S (8 Per Engine)
Porsche 944 (8 Per Engine)
Porsche 944 2.7L (8 Per Engine)
Porsche 964 3.6L (12 Per Engine)
Porsche 964 Turbo (12 Per Engine)
Porsche 928 (16 Per Engine)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 19.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410411107
92810419312
92810419313
91110419300
91110419303
92810419308
96410411107
596.981
96410411106
96410411104
96410411105
The product you are viewing cross references to these numbers
Price: £3.95
In stock