Please wait… 
Please wait while we process your order,
do not press the back button…
do not press the back button…
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.
Category Filter
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 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Information
Valve spring
Fits:
Porsche 993 C2 / C4 3.6L 1994-97
Click 'Zoom in' for large parts diagram.
Diagram Ref No 13.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310590151
The product you are viewing cross references to these numbers
Fits:
Porsche 993 C2 / C4 3.6L 1994-97
Click 'Zoom in' for large parts diagram.
Diagram Ref No 13.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310590151
99310590151
The product you are viewing cross references to these numbers
Price: £53.18
In stock
Vehicle Group
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Information
Engine cylinder head exhaust valve. Pre varioram engine cars
The OE Match exhaust valve is a precision engine component designed for Porsche 911 (993) Carrera models equipped with early 3.6L engines. It is installed in the cylinder head and forms part of the valve train responsible for controlling the flow of exhaust gases from the combustion chamber to the exhaust system.
Sold individually, 6 required per vehicle
Fits:
Porsche 993 C2 / C4 3.6L 1993 - 1995
* with Engine codes: M64.05 / M64.06 / M64.07 / M64.08
Diagram Ref No 10
The OE Match version of part number 99310541901 is designed for pre-Varioram Porsche 993 engines used in early Carrera models. It is engineered with the correct stem diameter, valve head size and material specification to withstand the extreme temperatures and stresses experienced in high-performance air-cooled engines.
The exhaust valve regulates the release of burnt gases from the combustion chamber. When opened at the correct time by the camshaft, it allows exhaust gases to exit the cylinder and enter the exhaust system, preparing the chamber for the next intake cycle.
Maintaining properly functioning valves is essential for efficient combustion, engine power and reliable operation.
Exhaust valves operate under extremely high temperatures and continuous mechanical stress. Over time they may wear, warp or suffer from carbon buildup, which can lead to compression loss, poor engine performance or valve train noise. Replacing worn valves during engine service or rebuild ensures proper combustion sealing and reliable engine operation.
Consider replacing the exhaust valve if you notice:
• Loss of compression or engine power
• Excessive valve train noise
• Burnt or worn valve surfaces
• During cylinder head rebuild or engine overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310541901
The product you are viewing cross references to these numbers
The OE Match exhaust valve is a precision engine component designed for Porsche 911 (993) Carrera models equipped with early 3.6L engines. It is installed in the cylinder head and forms part of the valve train responsible for controlling the flow of exhaust gases from the combustion chamber to the exhaust system.
Sold individually, 6 required per vehicle
Fits:
Porsche 993 C2 / C4 3.6L 1993 - 1995
* with Engine codes: M64.05 / M64.06 / M64.07 / M64.08
Diagram Ref No 10
The OE Match version of part number 99310541901 is designed for pre-Varioram Porsche 993 engines used in early Carrera models. It is engineered with the correct stem diameter, valve head size and material specification to withstand the extreme temperatures and stresses experienced in high-performance air-cooled engines.
The exhaust valve regulates the release of burnt gases from the combustion chamber. When opened at the correct time by the camshaft, it allows exhaust gases to exit the cylinder and enter the exhaust system, preparing the chamber for the next intake cycle.
Maintaining properly functioning valves is essential for efficient combustion, engine power and reliable operation.
Exhaust valves operate under extremely high temperatures and continuous mechanical stress. Over time they may wear, warp or suffer from carbon buildup, which can lead to compression loss, poor engine performance or valve train noise. Replacing worn valves during engine service or rebuild ensures proper combustion sealing and reliable engine operation.
Consider replacing the exhaust valve if you notice:
• Loss of compression or engine power
• Excessive valve train noise
• Burnt or worn valve surfaces
• During cylinder head rebuild or engine overhaul
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310541901
99310541901
3311.239
The product you are viewing cross references to these numbers
Price: £49.50
In stock
Vehicle Group
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
Information
Valve stem seals for inlet and exhaust valves
12 per engine. Sold each.
Fits:
Porsche 993 1994-98
Click 'Zoom in' for large parts diagram.
Diagram Ref no 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310411102
The product you are viewing cross references to these numbers
12 per engine. Sold each.
Fits:
Porsche 993 1994-98
Click 'Zoom in' for large parts diagram.
Diagram Ref no 8.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310411102
99310411101
99310411102
The product you are viewing cross references to these numbers
Price: £5.87
In stock