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Engine Bearings / Shells
By OE Match
- 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 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 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
12 x Big end bearing shells in standard size
12 x Connection Rod Bolts
6 x Connection Rod Bearing
Engineered to replace the original connecting rod bearings used on Porsche Boxster 986 / 987 and 911 996 / 997 and 987 Cayman platforms
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2006 - 2008
Porsche 996 1997 - 2005
Porsche 997 2005 - 2008
Diagram ref no 10, 11 & 12.
Each bearing shell is produced with smooth, low-friction bearing surfaces and consistent wall thickness to maintain correct rod-to-crankshaft clearances when installed in the rod big end. The standard size designation indicates these bearings retain factory bore dimensions, ideal for engines where no crankshaft undersize machining has been performed.
Big end bearing shells provide the low-friction interface between the connecting rod and crankshaft journal. They help to support dynamic engine loads and maintain a stable lubricating oil film that protects both the rod and crankshaft from metal-to‐metal contact. With proper oil flow and clearance, these bearings help ensure reliable rotation and reduce wear under normal and high-load conditions.
Installed in pairs inside each connecting rod’s big end bore, these bearing shells support the rotating crankshaft by maintaining correct clearance and offering a durable, smooth surface for the journal to ride on. Their design promotes even oil distribution and stable hydrodynamic lubrication - essential for wear resistance, smooth engine operation, and long service life.
Big end bearings are central to engine bottom-end integrity. They endure high loads, RPMs, and constant motion. Over time or due to lubrication issues, bearings can wear, lose material, or show surface degradation - leading to increased clearances, knocking noises, reduced oil pressure, and accelerated wear of the crankshaft journal.
Replacing worn bearings with OE Match shells during a rebuild restores proper oil clearances and hydrodynamic lubrication, helping protect the crankshaft and rod journals from premature wear while supporting smooth, reliable engine operation.
When to replace:
• Engine is undergoing rebuild or overhaul
• Bearing wear, noise, or rod knock detected
• After lubrication or oil starvation incident
• During high-mile preventive maintenance
• When crankshaft journals are within standard size (no undersize needed)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610312162
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- 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 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 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
OE Match set of 12 big end bearing shells in standard size engineered to replace the original connecting rod bearings used on Porsche Boxster 986 / 987 and 911 996 / 997 and 987 Cayman platforms
Set of 12 Bearing Shells
Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 987.1 Boxster 2005 - 2008
Porsche 987C.1 Cayman 2006 - 2008
Porsche 996 1997 - 2005
Porsche 997 2005 - 2008
Diagram ref no 12.
Each bearing shell is produced with smooth, low-friction bearing surfaces and consistent wall thickness to maintain correct rod-to-crankshaft clearances when installed in the rod big end. The standard size designation indicates these bearings retain factory bore dimensions, ideal for engines where no crankshaft undersize machining has been performed.
Big end bearing shells provide the low-friction interface between the connecting rod and crankshaft journal. They help to support dynamic engine loads and maintain a stable lubricating oil film that protects both the rod and crankshaft from metal-to‐metal contact. With proper oil flow and clearance, these bearings help ensure reliable rotation and reduce wear under normal and high-load conditions.
Installed in pairs inside each connecting rod’s big end bore, these bearing shells support the rotating crankshaft by maintaining correct clearance and offering a durable, smooth surface for the journal to ride on. Their design promotes even oil distribution and stable hydrodynamic lubrication - essential for wear resistance, smooth engine operation, and long service life.
Big end bearings are central to engine bottom-end integrity. They endure high loads, RPMs, and constant motion. Over time or due to lubrication issues, bearings can wear, lose material, or show surface degradation - leading to increased clearances, knocking noises, reduced oil pressure, and accelerated wear of the crankshaft journal. Replacing worn bearings with OE Match shells during a rebuild restores proper oil clearances and hydrodynamic lubrication, helping protect the crankshaft and rod journals from premature wear while supporting smooth, reliable engine operation.
When to replace:
• Engine is undergoing rebuild or overhaul
• Bearing wear, noise, or rod knock detected
• After lubrication or oil starvation incident
• During high-mile preventive maintenance
• When crankshaft journals are within standard size (no undersize needed)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610312162
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
A complete set of crankshaft main bearings - these are the half-shells (upper and lower) that support the crankshaft main journals inside the engine block. The set replaces all main-bearing shells to renew the engine bottom end’s bearing surfaces.
SET OF 14 Bearing Shells
Fits:
Engine code: M96.03
Porsche 996 3.6L
Engine code: M97.21 / M97.22
Porsche 987 Cayman
Porsche 987 Boxster
Porsche 997 3.6L / 3.8L
Diagram Ref No 13.
Sold as a full set of 14 bearing shells - enough to rebuild the entire main bearing bank of a six-cylinder boxer engine.
When installed, this bearing set:
• Provides a precise, low-friction journal surface for the crankshaft to rotate on
• Maintains correct bearing clearance and oil film under high loads and RPMs, ensuring smooth rotation and reducing wear.
• Helps preserve oil pressure and lubrication flow, preventing oil starvation and bearing damage.
• Restores engine reliability and reduces risk of bearing knock, wear or failure, especially on re-built or high-mileage engines.
Over time and use, main bearings wear down - surfaces can score, bearings can become pitted, clearance can increase, oil film may degrade, leading to:
• Engine knocks or bearing rumble
• Loss of oil pressure
• Excess crankshaft play or vibration
• Accelerated wear of crank pins, journals and engine internals
Replacing main bearings with a fresh set restores factory-correct clearances and bearing surfaces, ensuring smooth crankshaft rotation, proper oil flow, and long engine life - especially important after high mileage, rebuilding, or performance modification.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610120904
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 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche Cayman 2.7L 987C 2006-08
SET OF 14
Fits:
Porsche Boxster 986 2.7L M96.22 / M96.23
Porsche Boxster 986 3.2L M96.21 / M96.24
Porsche 996 3.4L M96.01 / M96.02 / M96.04
Porsche Boxster 987 2.7L M97.20
Porsche Boxster 987 3.2L M96.26
Porsche Cayman 987C 2.7L M97.20
Porsche Boxster 986 2.5L M96.20*
Porsche Boxster 987 2.7L M96.25*
Diagram ref. 13.
Important fitment information – please read before ordering:
Please be aware that some early 2.5L 986 Boxster models (*) were fitted with main bearing shells with the alignment/locating tab in the centre, as opposed to offset to the side, which is what this listing is for. Please check your existing bearing shells before ordering. If you have centre-aligned bearing shells, this product is not suitable and is no longer offered by Porsche as a replacement part.
In addition, some 2.5L models may be fitted with the earlier-style crankcase carrier, meaning the bearing shells required have the alignment tab on the right, not the left as is the case with this listing. Please ensure you check your existing shells before ordering. If the alignment tab on your existing shells is located on the right, please use part no. 99610113164 instead.
Additionally, for 2005 and 2006 2.7L 987 Boxster models (M9625 engine code) (*), the existing bearing shells are no longer offered by Porsche. These have the locating tab on the opposite side, meaning these bearings are incompatible. In order to fit these bearings, the crankcase carrier will need to be updated to the later style, part no. 99610100709.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610120510
The product you are viewing cross references to these numbers
OEMatch Engine Bearings / Shells — Durability, Sealing, Performance
OEMatch engine bearings / shells for Porsche models are compatible replacements engineered to original-spec dimensions and tolerances — a practical option when genuine or OEM parts are unavailable. Shell bearings support crankshaft and connecting rod rotation, maintain oil clearance and distribute combustion loads to protect internal components.
Available Types- Big end (connecting rod) bearings
- Thrust bearings
- Main and journal bearing shells
OE (Original Equipment) refers to parts matching original specifications for the engine bearings / shells and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM engine bearings / shells engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
- Restores correct oil clearance and lubrication
- Reduces knocking and vibration from worn journals
- Prevents crankshaft scoring and internal wear
- Oil starvation or sustained low oil pressure
- Contaminated or degraded engine oil introducing abrasive particles
- Incorrect clearance, poor installation or worn mating journals
- Tri‑metal and bi‑metal alloy options for thermal stability
- Precision-machined tolerances to maintain oil film and clearance
- Suitable for a wide range of air-cooled and water-cooled Porsche engines
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Intermediate shaft (IMS)
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Oil System Parts
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Fuel System Parts
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Gaskets & Sets
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Radial Seal / RMS / Camshaft / Balance shaft
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Belts / Tensioners / Rollers
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Chains & Tensioners
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Engine Valves / Guides / Springs
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Rocker Arms & Tappets
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Engine Bolts / Studs
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Engine Mounts
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Piston Rings
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Connecting Rod
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Cylinder Head / Camshaft Carrier
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Crankcase Parts
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Crankshaft & Parts
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Air Intake & Injection
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Vacuum Pump
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Specialist Tools
