Engine Bolts / Studs

Crankshaft through bolt washer.



Fits:
Porsche 911 1965-89
Porsche 914-6 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

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90110116103

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Cylinder head nut.
24 per engine. Price is for each.



Fits:
Porsche 911 1965-89 all models

Click 'Zoom in' for large parts diagram.
Diagram Ref No 17.

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90110438204

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Cylinder head nut.
24 per engine. Price is for each.



Fits:
Porsche 356B / 356C
Porsche 912
Porsche 911 1965-89 all models

Click 'Zoom in' for large parts diagram.
Diagram Ref No 17.

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90110438204

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Cylinder head studs.
Normally 24 studs per engine. Sold EACH



Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1994-98

This product supersedes Porsche's old part numbers:
- 99310117051

Solves the problems of loose head studs, The exhaust leak you hear in the 911 may actually be the cylinder head leaking where the studs have pulled loose. As Porsche increased displacement of the 911 engine, the different rates of thermal expansion have caused head studs to break or pull out from the engine case. 

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.

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99310117054

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Dilavar Head Studs.
Normally 24 studs per engine. Sold EACH



Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1994-98

This product supersedes Porsche's old part numbers:
- 99310117051

Solves the problems of loose head studs, The exhaust leak you hear in the 911 may actually be the cylinder head leaking where the studs have pulled loose. As Porsche increased displacement of the 911 engine, the different rates of thermal expansion have caused head studs to break or pull out from the engine case. These latest Dilavar steel head studs have a thermal expansion rate of approximately the same as the alloy case.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99310117054

The product you are viewing cross references to these numbers

Dilavar head studs. Normally 24 studs per engine.
Sold EACH



Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1994-98

This product supersedes Porsche's old part numbers:
- 99310117051

Solves the problems of loose head studs, The exhaust leak you hear in the 911 may actually be the cylinder head leaking where the studs have pulled loose. As Porsche increased displacement of the 911 engine, the different rates of thermal expansion have caused head studs to break or pull out from the engine case. These latest Dilavar steel head studs have a thermal expansion rate of approximately the same as the alloy case.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.

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99310117054

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Engine case hardware set, titanium. 

Air-cooled Porsche 911 complete engine case hardware kit in high-strength high-purity Titanium alloy. 

Includes studs:
For 911
Ti Alloy studs x 57
12 Point Ti Alloy Lock Nuts x 57

For 964/993
Ti Alloy studs x 62
12 Point Ti Alloy Lock Nuts x 62

Porsche Motorsports employed titanium alloy engine case fasteners on many of their famous race cars, including the 904, 908, 935, 962, and some modern LMP2.

Fits:
Porsche 911 3.0ltr / 3.3ltr
Porsche 964
Porsche 993

Engine case through bolt set, titanium. 

Kit Contents
Ti Alloy Studs x 11
Ti Alloy Washers x 22
Ti Alloy 12-point Nuts x 11

Porsche Motorsports employed titanium alloy engine case fasteners on many of their famous race cars, including the 904, 908, 935, 962, and some modern LMP2.

Fits:
Porsche 911
Porsche 964
Porsche 993

Air-cooled Porsche 911 engine case through bolts in high-strength high-purity Titanium alloy. Including studs, washers, and  nuts.

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SL-TB-

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Engine casing kit.



Fits:
Porsche 911 2.7L to 3.2L & 930 3.3L

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504-9501

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Engine crankcase stud M8 X 78. 3 per engine. Price is for each.



Fits:
Porsche 911 1965-89 all models
Porsche 964 1989-94
Porsche 993 1995-98
Porsche 996 TURBO / GT3 1998-04
Porsche 997 TURBO / GT3 2005-12
Porsche 914 1970-76


Click 'Zoom in' for large parts diagram.
Diagram Ref No 6.

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90006010101

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Engine crankcase stud, BM8FO x 22. 
Sold each.



Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1995-98
Porsche 996 Turbo 2001-05
Porsche 996 GT3 3.6L 1999-05
Porsche 997.1 Turbo 2007-09
Porsche 997 GT3 3.6L 2006-09
Porsche 914-6 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 4

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90006010601

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Engine crankcase stud, BM8FO x 22. 
Sold each.



Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1995-98
Porsche 996 Turbo 2001-05
Porsche 996 GT3 3.6L 1999-05
Porsche 997.1 Turbo 2007-09
Porsche 997 GT3 3.6L 2006-09
Porsche 914-6 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 4

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90006010601

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Engine crankcase stud, M 10 X 75.
Left



Fits:
Porsche 911 Turbo 1975-77

Click 'Zoom in' for large parts diagram
Diagram ref no 6

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99906216502

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Engine crankcase stud, M8 x 52. RIGHT.
Sold each.



Fits:
Porsche 911 1965-89
Porsche 964 1989-94
Porsche 993 1995-98
Porsche 996 Turbo 2001-05
Porsche 996 GT3 3.6L 1999-05
Porsche 997.1 Turbo 2007-09
Porsche 997 GT3 3.6L 2006-09
Porsche 914-6 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 11

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90006010201

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Head stud height setter for Porsche 911



Precisely set the height of head studs on all the 911 engines using this innovative tool. The Delrin insert protects the engine case from scratches or marring, while the adjustable three-piece anodized aluminium tubular construction provides complete flexibility for all engine setups, tools, and stud combinations.

For all 911s including GT3s.

Engine Head Studs Cap Nut. 24  required per engine. 

Fits:
Porsche 911 1970-89

Click picture for large parts diagram.
Diagram Ref No 24.