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- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08
Fits:
Porsche 987 Boxster S 3.4L2006-08
Porsche 987C Cayman S 3.4L 2006-08
Porsche 997 Carrera S 3.8L 2005-08 (Cabrio / Coupe)
Click picture for large parts diagram.
Diagram Ref No 1.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710594701
The product you are viewing cross references to these numbers
- 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 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
Fits:
Porsche 964 Carrera 2 / Carrera 4 - 1989 to 1994
Porsche 993 Carrera 2 / Carrera 4 - 1994 to 1997
Porsche 993 Carrera S / Carrera 4S - 1994 - 1997
This is specifically designed for the 964 and 993 engines running mechanical rocker arms (MRA). It is ideal for those after performance throughout the entire rev range on the road or for light track use.
This is a mild-mannered road camshaft that won't be too lumpy at idle.
We source this camshaft from Schrick AVL in Germany to ensure quality, performance, reliability and precise fitment.
Camshaft Specs:Intake Cams:
Cam Lift (mm)= 8.8mm
Valve Lift (mm) = 13.2 mm
Opening Duration °CRA = 288°
Peak Timing °CRA = 114°
Valve Timing °CRA (IO-IC) = 30-78
Valve Lift at TDC (mm) = 2.1mm
Valve Clearance (mm) – 0.2mm
Bearing - Ø 49 mm with drive for power steering pump
Exhaust Cams:
Cam Lift (mm)= 8.8mm
Valve Lift (mm) = 13.2 mm
Opening Duration °CRA = 280°
Peak Timing °CRA = 114°
Valve Timing °CRA (EO-EC) = 74-26
Valve Lift at TDC (mm) = 1.7mm
Valve Clearance (mm) – 0.2mm
Bearing - Ø 49 mm with drive for power steering pump
Please note:
These camshafts are for naturally aspirated 964 and 993 models with mechanical rocker arms (MRA). Different manufacturing tolerances require an inspection of the free clearance of all parts
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1880020005
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
OE Match replacement camshaft for Porsche 993 applications, with specific C2 / C4 fitment listed for 1994–95. Separate part references identify the left and right applications.
Fits
Porsche 993 C2 / C4 1994-95
with engine: 6405, 6406, 6407, 6408
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram ref no 23
What This Product Does
The camshaft operates the valve train through its shaped lobes, determining valve opening, lift and closing events. Its profile and condition influence how the engine admits its intake charge and releases exhaust gases.
Functions
- Actuates the associated valve-train components.
- Defines valve lift and opening duration.
- Controls valve events within the engine cycle.
Technical Details
- Brand: OE Match.
- Left camshaft reference: 99310524716.
- Right camshaft reference: 99310524613.
- Diagram engine designations: M64.05/06 and M64.07/08.
- Both supplied valve-control diagrams cover the 993 assembly for 1994–98; this assembly coverage does not replace the specific fitment checks above.
Symptoms of Fault
- Tapping or ticking around the valve train.
- Uneven idle, misfiring or reduced engine output.
- Scored, pitted or visibly worn cam lobes.
- Unusual contact wear on rockers or followers.
- Metallic particles discovered during oil or filter inspection.
These signs are not exclusive to camshaft damage. Confirm the cause through inspection before selecting replacement components.
Why Replacement Matters
Renewal is appropriate when inspection establishes damaged lobes or wear affecting valve operation. During rebuild work, assess the contacting rockers or followers and investigate lubrication problems or contamination. Leaving the underlying cause unresolved can expose replacement components to further wear.
FAQs
Should the rockers or followers be checked?
Yes. Inspect their contact surfaces and replace worn components as required rather than assuming they remain suitable.
Can lubrication problems damage a camshaft?
Insufficient lubrication or abrasive contamination can contribute to surface deterioration. Investigate the oil supply and any debris before reassembly.
How do I select the correct version?
Match the engine designation, production details and required side to the relevant part reference. The left and right references identify different applications.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310524
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
Fits:
Porsche 993 C2 / C4 1994-95
with engine: 6405, 6406, 6407, 6408
Click 'Zoom in' for large parts diagram.
Diagram ref no 23
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310524
The product you are viewing cross references to these numbers
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
OE Match camshaft for selected Porsche 993 C2, C4, C2S and C4S applications. The supplied references identify separate left- and right-hand versions, so confirm the required position and engine specification.
Fits
Porsche 993 C2 / C4 1996-98
with engine: 6421, 6422, 6423, 6424
The vehicle listings above must be checked alongside the engine-specific application and required camshaft reference.
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram reference no 23
What This Product Does
The camshaft operates the valve train, determining when valves open and close and how far they move. Its lobe profile controls valve movement in relation to engine rotation. Correct selection is therefore important during cylinder-head repairs or an engine rebuild.
Functions
- Controls valve opening and closing events.
- Determines valve lift and opening duration.
- Coordinates valve operation with the engine cycle.
Technical Details
- Brand: OE Match.
- Left-hand camshaft reference: 99310524715; shown in valve control diagram 103-10, item 33.
- Right-hand camshaft reference: 99310524614; shown in valve control diagram 103-15, item 24.
- Diagram engine designations: M64.21/22 and M64.23/24.
- Supplied engine identifiers: 6421, 6422, 6423, 6424.
- Left and right valve-control diagrams cover Porsche 993 applications from 1994–98.
Symptoms of Fault
- Tapping or ticking around the valve train.
- Irregular idle, misfiring or uneven engine operation.
- Reduced engine output associated with valve-actuation problems.
- Pitted, scored or visibly worn cam lobes.
- Unusual wear on the contacting rocker or follower surfaces.
- Metal particles discovered during oil or filter inspection.
These signs are not conclusive evidence of camshaft failure. Inspect the valve train and lubrication system before selecting replacement components.
Why Replacement Matters
A damaged lobe can prevent the intended valve movement. Replacement may be appropriate where inspection confirms wear, pitting or scoring. Establish whether inadequate lubrication or contaminated oil contributed to the damage, and assess contacting components before reassembly. During a rebuild, inspect associated seals, timing components and fixings rather than assuming they remain serviceable.
FAQs
Which reference identifies each side?
The supplied diagrams associate 99310524715 with the left-hand assembly and 99310524614 with the right-hand assembly.
Should the rockers or followers be inspected?
Yes. Worn contact surfaces can affect a replacement camshaft; assess them during dismantling.
Can lubrication problems damage a camshaft?
Insufficient oil supply or abrasive contamination can contribute to surface deterioration. Investigate the cause alongside the visible damage.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310524
The product you are viewing cross references to these numbers