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Exhaust valve guide 41.91mm Porsche 996/997 GT3/Turbo ❭ 99610414503
- Porsche 996 TURBO 2000-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
Exhaust valve guide 41.91mm by OE Match for selected Porsche 996 and 997 GT3 and Turbo engines, supplied as an OE-style replacement for correct valve location in the cylinder head.
What This Product Does
This exhaust valve guide supports and locates the exhaust valve stem in the cylinder head, helping to maintain alignment, minimise side loading, and provide a controlled path for heat transfer away from the valve.
Functions
- Guides the exhaust valve stem within the cylinder head
- Helps maintain valve seating accuracy for consistent sealing
- Provides a running surface for the valve stem to reduce wear
- Contributes to heat transfer from the valve into the cylinder head
Symptoms of Fault
- Blue smoke on overrun or deceleration
- Increased engine oil consumption
- Rough idle or misfires linked to poor valve sealing
- Low compression or high leak-down readings via the exhaust side
- Ticking or tapping noises from the valvetrain area
Why Replacement Matters
Worn or damaged valve guides can affect valve seating, increase oil consumption and contribute to combustion deposits. During top-end or full engine rebuilds, guides are typically renewed along with valves, stem seals and related hardware while the cylinder heads are dismantled, reducing the likelihood of repeat strip-downs after reassembly.
Fits
- Porsche 996 (911) (1997–2005)
- Porsche 996 (911) (1997–2005) ⇒ 996 TURBO 2000–05
- Porsche 996 (911) (1997–2005) ⇒ 996 GT3 MKI 1999–02
- Porsche 996 (911) (1997–2005) ⇒ 996 GT3 MKII 2003–>>
- Porsche 996 (911) (1997–2005) ⇒ 996 GT3 RS 2003–04
- Porsche 997 (911) MK1 2005–2008
- Porsche 997 (911) MK1 2005–2008 ⇒ 997 MK1 TURBO 2007–09
- Porsche 997 (911) MK1 2005–2008 ⇒ 997 MK1 GT3 / GT3 RS 2007–09
- Porsche 997 (911) MK2 2009–2012
- Porsche 997 (911) MK2 2009–2012 ⇒ 997 MKII GT3 / GT3 RS 2010–11
- Porsche 997 (911) MK2 2009–2012 ⇒ 997 MKII Turbo 2010–13
Check fitment for your specific vehicle (model, year, engine) before ordering.
Key Dimensions & Material
Material: copper
Inner diameter: 5.92mm
Outer diameter: 10.54mm
Length: 41.91mm
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610414503
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