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Connecting Rod

Kit includes:
1 x Plastigauge PL-A box
1 x Plastiguage Mineral grease
1 x Plastiguage Silicone grease
PLASTIGAUGE PL-A is widely used in the measurement of clearance in plain automotive bearings. Measurement of clearance in big-end bearings can be achieved without dismantling the crankshaft.
3G Minerak Grease: To coat journal prior to use of Plastigauge
3G Silicone Grease: To apply to surface of shell
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PLASKIT
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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
Fits:
Porsche 911 3.2 (84-89)
Porsche 911 Turbo 3.3 (78-89)
Porsche 964 C2 (90-94)
Porsche 964 C4 (89-94)
Porsche 964 RS (92-92)
Porsche 964 Turbo-Look (91-94)
Porsche 964 CUP-RACE (90-93)
Porsche 964 Turbo 3.3 (91-92)
Porsche 964 Turbo 3.6 (93-94)
Click 'Zoom in' for large parts diagram.
Diagram Ref No 13 & 14
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410317605
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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
Fits:
Porsche 911 3.2 (1984 - 1989)
Porsche 911 Turbo 3.3 (1978 - 1989)
Porsche 964 C2 (1990 - 1994)
Porsche 964 C4 (1989 - 1994)
Porsche 964 RS (1992 - 1992)
Porsche 964 Turbo-Look (1991 - 1994)
Porsche 964 CUP-RACE (1990 - 1993)
Porsche 964 Turbo 3.3 (1991 - 1992)
Porsche 964 Turbo 3.6 (1993 - 1994)
Diagram Ref No 13.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410317605
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Fits:
Porsche 911 1984-89
Porsche 911 (930) Turbo 1978-89
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 Turbo / GT2 1998-05
Porsche 997 Turbo / GT2 2005-08
Diagram Ref No 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310317403
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
100 Plasigauge strips per box

PLASTIGAUGE PL-A is widely used in the measurement of clearance in plain automotive bearings. Measurement of clearance in big-end bearings can be achieved without dismantling the crankshaft.
For measurements of: 0.001″ to 0.007″ (0.025mm – 0.175mm)
Suitable for use at temperatures between 0°C and 35°C
Contents:
Related reference numbers
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PLA007
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
SET OF 6
Fits:
Porsche 911 1984-89 3.2L
Porsche 911 1978-89 3.3L Turbo
Porsche 964 3.3L Turbo
CP-Carrillo connecting rods are fully machined from a proprietary 4330m alloy forging for strength and durability. Rods are available with 2 types of bolts: The standard WMC-H6 bolt with a UTS of 220ksi and our upgraded CARR-S6 bolt with a UTS of 285ksi. The CARR upgraded bolt is a good choice if planning on revving the engine higher than 8500rpm.
All our bolts are manufactured with asymmetrical threads, each thread has a slightly different design than the previous giving the bolts an evenly distributed thread engagement. This helps increasing the clamp load and fatigue life of the fasteners
Diagram Ref No 16.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010397501
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
SET OF 6
Fits:
Porsche 911 1984-89 3.2L
Porsche 911 1978-89 3.3L Turbo
CP-Carrillo connecting rods are fully machined from a proprietary 4330m alloy forging for strength and durability. Rods are available with 2 types of bolts: The standard WMC-H6 bolt with a UTS of 220ksi and our upgraded CARR-S6 bolt with a UTS of 285ksi. The CARR upgraded bolt is a good choice if planning on revving the engine higher than 8500rpm.
All our bolts are manufactured with asymmetrical threads, each thread has a slightly different design than the previous giving the bolts an evenly distributed thread engagement. This helps increasing the clamp load and fatigue life of the fasteners
Diagram Ref No 16.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010397500
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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
Sold individually; six required per vehicle.

Fits:
Porsche 911 Turbo (930) 1978-89
Porsche 911 Carrera 3.2L 1984-1989
Porsche 964 Carrera / Turbo 1989-94
Click picture for large parts diagram.
Diagram Ref No 17.
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 914 (1970-1976)
Sold individually; six required per vehicle.

Fits:
Porsche 911 Turbo (930) 1978-89
Porsche 911 Carrera 3.2L 1984-1989
Porsche 964 Carrera / Turbo 1989-94
Click picture for large parts diagram.
Diagram Ref No 17.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010313401
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 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

Fits:
Porsche 911 3.2 (84-89)
Porsche 911 Turbo 3.3 (78-89)
Porsche 964 C2 (90-94)
Porsche 964 C4 (89-94)
Porsche 964 RS (92-92)
Porsche 964 Turbo-Look (91-94)
Porsche 964 CUP-RACE (90-93)
Porsche 964 Turbo 3.3 (91-92)
Porsche 964 Turbo 3.6 (93-94)
Porsche 993 C2
Porsche 993 C4
Porsche 993 C2S
Porsche 993 C4S
Porsche 993 RS
Porsche 993 Turbo
Porsche 993 Turbo S
Porsche 993 GT2
Click 'Zoom in' for large parts diagram.
Diagram Ref No 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410317605
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
- 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 Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- 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 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
- 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
Price is Each
Diagram ref no 10.
- Porsche Boxster 986 2.5L 1997-99
- 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 Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- 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 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
- 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
- Porsche Cayman 2.7L 981 2013-16
- Porsche Cayman S / GTS 3.4L 981 2013-16
- Porsche Cayman GT4 3.8L 2015-16
Price is Each
Diagram Ref No 10.
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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
Price Is For Each.
x12 Per Engine.
Fits:
Porsche 911 3.2 1984>>1989
Porsche 911 Turbo 3.3 1978>>1989
Porsche 964 C2 1990>>1994
Porsche 964 C4 1989>>1994
Porsche 964 RS 1992>>1992
Porsche 964 Turbo-Look 1991>>1994
Porsche 964 CUP-RACE 1990>>1993
Porsche 964 Turbo 3.3 1991>>1992
Porsche 964 Turbo 3.6 1993>>1994
Diagram Ref No 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410317605
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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
The connecting rod bolt is a replacement fastener for Porsche air-cooled flat-six engines. Designed to match the original Porsche specification in strength, thread pitch, and clamping characteristics, this bolt secures the connecting rod cap to the rod body - maintaining correct bearing crush, rod alignment, and engine reliability under high RPM and load.
12 per engine. Price is for each.
Fits:
Porsche 911 3.2 (1984 - 1989)
Porsche 911 Turbo 3.3 (1978 - 1989)
Porsche 964 C2 (1990 - 1994)
Porsche 964 C4 (1989 - 1994)
Porsche 964 RS (1992 - 92)
Porsche 964 Turbo-Look (1991 - 1994)
Porsche 964 CUP-RACE (1990 - 1993)
Porsche 964 Turbo 3.3 (1991 - 1992)
Porsche 964 Turbo 3.6 (1993 - 1994)
Diagram Ref No 13.
• Position: Bottom end — connecting rod cap to connecting rod
• Function: Provides precise clamp load to secure the rod big-end bearing and maintain crankshaft/rod geometry at all engine speeds
• Rod bolts are critical, high-stress fasteners that should be replaced during any bottom-end rebuild. Fatigue, prior stretching, or incorrect torque can lead to catastrophic rod failure. Replacing with OE-Match bolts ensures reliable clamping force and protects engine longevity.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
96410317605
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
12 per engine. Price is for each.

Fits:
Porsche 911 1984-89
Porsche 911 (930) Turbo 1978-89
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 Turbo / GT2 1998-05
Porsche 997 Turbo / GT2 2005-08
Click 'Zoom in' for large parts diagram.
Diagram Ref No 11.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310317403
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Con Rod Nut
Sold each - 12 required per car
The OE Match Con Rod Nut is a critical internal
engine fastener used to secure the connecting rod cap to the connecting rod
assembly. Suitable for various Porsche 911, 964, 993, 996 Turbo and 997 Turbo
engines, this precision-engineered component plays a vital role in maintaining
the structural integrity of the engine's rotating assembly.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- 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 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
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
Diagram Ref No 11
The connecting rod assembly is subjected to enormous forces during engine operation, particularly at high RPM. The con rod nuts must maintain precise clamping force to ensure the connecting rod cap remains securely attached under extreme combustion and inertial loads. Even the slightest loss of clamping force can result in catastrophic engine failure.
For this reason, con rod nuts are considered a critical engine rebuild component and should always be replaced during engine overhauls, connecting rod servicing or performance engine builds.
What Does a Con Rod Nut Do?
The con rod nut secures the connecting rod cap to the connecting rod body, clamping around the crankshaft journal bearing.
Its functions include:
- Maintaining connecting rod cap security
- Preserving bearing crush and alignment
- Supporting crankshaft rotation
- Withstanding high engine loads
- Maintaining precise clamping force
- Supporting engine reliability
- Protecting internal engine components
The connecting rod assembly relies entirely on the integrity of its fastening hardware to survive the extreme loads generated during operation.
Why Do Con Rod Nuts Fail?
Con rod nuts are subjected to repeated tensile loads, heat cycles and vibration throughout their service life.
Common causes of failure include:
- Metal fatigue
- Repeated engine stress cycles
- Overstretching during previous installation
- Improper torque procedures
- High mileage wear
- Performance engine operation
- Corrosion during storage
- Reuse during multiple rebuilds
Many con rod nuts are designed as single-use fasteners and can lose their ability to maintain proper clamping force if reused.
When Should Con Rod Nuts Be Replaced?
Replacement is strongly recommended whenever the connecting rods are disassembled.
Typical situations include:
- Engine rebuilds
- Crankshaft replacement
- Connecting rod servicing
- Bearing replacement
- Performance engine upgrades
- Motorsport engine preparation
- Full engine restoration projects
- Preventative rebuild maintenance
As con rod nuts are relatively inexpensive compared to the cost of engine repairs, replacing them during rebuild work is considered essential best practice.
Why Replacement Matters
The con rod nut is one of the most critical fasteners within the entire engine.
Benefits of replacement include:
- Maintains correct clamping force
- Supports bearing integrity
- Reduces risk of engine failure
- Improves engine reliability
- Protects expensive internal components
- Essential for professional engine builds
- Supports high-performance applications
- Provides peace of mind during rebuilds
For air-cooled and turbocharged Porsche engines, correct connecting rod hardware is fundamental to long-term durability and performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99310317403
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High-Performance Connecting Rods (Con Rods) – Strength, Precision, and Balance for Porsche Engines
Connecting rods — commonly known as con rods — form the vital link between the piston and the crankshaft, converting linear motion into rotational force. In high-performance Porsche engines, con rods endure immense stress, heat, and pressure with every revolution, making their strength, balance, and precision crucial for reliability and performance.
At Design911, we offer a range of precision-engineered
connecting rods designed for both classic and modern Porsche engines.
Manufactured from motorsport-grade materials, these components deliver
exceptional tensile strength, fatigue resistance, and dimensional accuracy —
essential for high-RPM operation, rebuilds, and engine tuning projects.
What Do Connecting Rods Do?
Connecting rods are the mechanical bridge between pistons and the crankshaft, transmitting the force generated during combustion into the crank’s rotational motion.
Core Functions:
- Convert
reciprocating motion into rotation, enabling engine power output.
- Withstand
extreme pressure during every combustion cycle.
- Maintain
piston alignment and crankshaft balance at high speeds.
- Influence engine response and rev characteristics, particularly in performance applications.
Lightweight yet durable connecting rods are critical to maintaining smooth, reliable power delivery across the RPM range.
Why Do Connecting Rods Fail?
Even with Porsche’s engineering precision, connecting rods can degrade or fail due to stress, wear, or improper lubrication — especially under performance driving conditions.
Common Causes of Failure Include:
- Oil
starvation leading to bearing failure or heat damage.
- Over-revving
or detonation causing bending or fatigue cracking.
- Incorrect
torque or clearance during rebuilds.
- Material
fatigue from age, stress, or high-mileage operation.
- Improper lubrication causing friction wear on big-end bearings.
A failing con rod can result in catastrophic engine failure, making proactive inspection and replacement essential during rebuilds or upgrades.
Why Replace with Performance-Grade Connecting Rods?
Upgrading to high-strength connecting rods ensures your Porsche engine maintains optimal balance, durability, and performance under high stress. Whether restoring a classic flat-six or building a tuned turbocharged powerplant, precision rods provide improved reliability and smoother operation.
Key Benefits:
- Increased
strength and fatigue resistance under high-load conditions.
- Enhanced
engine response through reduced rotational mass.
- Maintains
piston-to-crank alignment for smoother operation.
- Ideal for rebuilds, tuning, and performance upgrades.
- Crafted
from premium materials such as forged steel, billet alloy, or
titanium.
- Precision-balanced to reduce vibration and ensure even load distribution.
Motorsport-grade connecting rods deliver the perfect balance of strength and agility, ensuring your Porsche engine performs reliably — whether on the track or road.
Highlights:
- High-performance
con rods engineered for strength and endurance.
- Manufacturer-quality
fitment for seamless integration with Porsche engines.
- Forged
and billet designs available for both naturally aspirated and
turbocharged models.
- Lightweight,
precision-balanced construction for maximum RPM stability.
- Perfect for performance builds, rebuilds, and engine restorations.
- Tested to motorsport standards for strength, fatigue, and dimensional accuracy.