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- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- 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 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 TURBO 2007-09
- Porsche 997 MK1 GT3 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 2010-11
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 914 (1970-1976)
Sold as PAIR / Requires 1 pair per engine
Pair, includes two bearing shells for the intermediate shaft, with one shell having a thrust shoulder. This bearing set is used to control axial play and radial support of the intermediate shaft. These precisely machined shells maintain the correct end-float, allowing accurate cam timing and smooth chain drive function under high RPM loads.
Fits:
Porsche 911 - 1965 to 1989
Porsche 914/6 - 1970 to 1976
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 996 turbo / GT2 / GT3
Porsche 997.1 turbo / GT2 / GT3
Porsche 997.2 GT2 / GT3
This product supersedes Porsche's old part numbers:
- 91610113700
- 99310113700
- 99310113701
Diagram ref no 29.
These high-quality bearings resist wear, maintain stability under loading, and reduce friction. The shoulder shell is designed to handle axial load and keep the shaft from shifting. Both shells are matched to OE tolerances for crush and thickness to preserve ideal oil film clearance and ensure long life.
• Location: Inside the engine case, at the intermediate shaft bore, flanking the connecting housing
• Function: Provides radial support and axial control (shoulder shell) for the intermediate shaft
Over time, the intermediate shaft bearing shells may wear, lose geometry, or develop surface fatigue. Symptoms of failure include increased endplay (shaft axial movement), chain rattle, timing variation, and rapid wear of adjacent sprockets or tensioners.
This pair should be replaced during any engine rebuild, crankshaft pull, or when measurements show endplay outside specification. Installing fresh shells restores proper shaft location and timing stability for durable performance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610113780
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 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
for M96 Engines and Early M97.01
Fits:
Porsche 996 C2 3.4L 1998 - 2001
Porsche 996 C2 3.6L 2002 - 2004
Porsche 996 C4 3.4L 1999>>
Porsche 996 C4 3.6L 2000>>
Porsche 996 C4 3.4L 2001>>
Porsche 996 C4 3.6L 2002 - 2004
Porsche 996 C4S 3.6L 2002- 2005
Porsche 997 C2 3.6L 2005 M96.05
Porsche 997 C2S 3.8L 2005 M97.01**
Porsche 997 C4 3.6L 2005 M96.05
Porsche 997 C4S 3.8L 2005 M97.01**
**Engine (3.8) number up to M97/01 68509790 has the older IMS bearing (this product fits) and Engine number from M97/01 68509791 has the larger revised IMS. (this product does not fit)
Porsche Boxster 986 2.5L 1997 - 1999
Porsche Boxster 986 2.7L 2000 - 2003
Porsche Boxster 986 2.7L 2004 - 2005
Porsche Boxster S 986 3.2L 2000 - 2005
Porsche Boxster 987 2.7L / 3.2L / 3.4L
**M96 Engine only
Fits engine types: Carrera 996 M96 engines, Boxster 986 M96 Engines, Boxster 987 M96 Engines, Carrera 997 M96 & M97.01 **Engine (3.8) number up to M97/01 68509790 has the older IMS bearing (this product fits) and Engine number from M97/01 68509791 has the larger revised IMS. (this product does not fit)
IMS Eternal Fix retro fit kit installs in-car without removal or disassembly of the engine required. The Cylindrical Bearing with Thrust Control design has a load capacity 5 times greater than the inferior, failure prone, Ball Bearing solutions on the market!
Why Cylindrical is Best?
Cylindrical Bearings have very high load bearing capacity, 5 times more than Ball Bearing. Cylindrical Bearings are used in, High Temp & Low Viscosity Lubrication such as Automatic Transmissions. They can carry extreme lateral pressure without wear to the friction surfaces. This is because the bearing friction surface is flat not concave.
IMS Intermediate Shaft Bearing Upgrade – EPS Eternal Fix (M96 / Early M97.01) Prevent future IMS-related engine damage with the EPS Eternal Fix for the well-known Porsche IMS bearing issue. Unlike common ball-bearing upgrades, EPS uses a patented cylindrical roller bearing with thrust control, engineered to separate axial (thrust) loads from radial (running) loads for long-term durability.
What makes EPS different?
Many bearing upgrades can be compromised when thrust loads act on the bearing rollers. EPS’s patented design ensures the rollers carry radial load only, while the axial load is carried around the full perimeter of the outer race. This reduces overload conditions and delivers a solution engineered to last the life of the engine.
Key benefits
Patented cylindrical bearing with thrust control (not a ball-bearing solution)
In-car installation: designed to be pressed into the rear of the engine without engine disassembly EPS states significantly increased load capacity vs typical ball-bearing upgrades (often quoted as up to 12x)
Backed by an EPS 5-year warranty
Recommended to install alongside the Rear Main (#8) Seal and Housing
Important fitment note (997 3.8L M97.01) Engine numbers up to M97/01 68509790 use the older IMS bearing (fits). Engine number M97/01 68509791 onwards has the larger revised IMS (does not fit). Please verify engine number before ordering.
For More Information CLICK HERE
For Installation Instructions CLICK HERE
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610590102EPS
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 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
Fits:
Porsche 997 2005-08
Porsche Boxster 987
Porsche Cayman 987
(Not for M96 Engines)
Porsche Ims Intermediate Shaft Bearing Upgrade - Eternal Fix with Oil Pressure Feed - 58 MM - Open Engine Permanently Fix Your Intermediate Shaft With The Eternal Fix! Unlike Failure Prone Ball Bearings, Eps Uses A Patented Cylindrical Bearing With Thrust Control.
Prevent future catastrophic engine failure permanently with the only true Eternal Fix for the notorious Porsche intermediate shaft bearing. Unlike the other failure-prone ball bearing products that the original IMS and other upgrades on the market use, EPS uses a patented cylindrical bearing with thrust control that can be pressed directly into the back of the engine without disassembly. The cylindrical bearings have over 12 times the load capacity of other ball bearing solutions making the EPS IMS bearing the clear choice. Backed by a full 5-year warranty and includes an oil feed modification kit. Order yours today!
WHAT MAKES OUR SOLUTION DIFFERENT?
Roller bearings are not intended for carrying large axial loads. Similar to failure-prone ball bearings, when cylindrical roller bearings are used for thrust control, the roller becomes compromised due to the limited surface contact area on the sides of the rollers. The results of using a cylindrical bearing for thrust control will be similar to all other ball bearing solutions.
In our patented system, we use a 15mm cylindrical bearing with thrust control that allows for the separation of the axial load from the radial load. Our roller bearings do NOT carry the axis load (thrust control) on the side, which leaves the roller free to carry only the radial load (main load). The axial load is carried exclusively on the entire permitter of the outer race. This results in a bearing that is not overloaded and will last the lifetime of the engine.
EPS recommends using this product in conjunction to the Rear Main #8 Seal and Housing
- Porsche Boxster 987 2.7L 2005 -08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- 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 Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
the boring tool can be purchased or rented from us
Code: 987997IMSTOOL
Fits:
Porsche 997 2005-08
Porsche Boxster 987
Porsche Cayman 987
(Not for M96 Engines)
Porsche Ims Intermediate Shaft Bearing Upgrade - Eternal Fix with Oil Pressure Feed - 62 MM - Closed Engine Permanently Fix Your Intermediate Shaft With The Eternal Fix! Unlike Failure Prone Ball Bearings, Eps Uses A Patented Cylindrical Bearing With Thrust Control.
Prevent future catastrophic engine failure permanently with the only true Eternal Fix for the notorious Porsche intermediate shaft bearing. Unlike the other failure-prone ball bearing products that the original IMS and other upgrades on the market use, EPS uses a patented cylindrical bearing with thrust control that can be pressed directly into the back of the engine without disassembly. The cylindrical bearings have over 12 times the load capacity of other ball bearing solutions making the EPS IMS bearing the clear choice. Backed by a full 5-year warranty and includes an oil feed modification kit. Order yours today!
WHAT MAKES OUR SOLUTION DIFFERENT?
Roller bearings are not intended for carrying large axial loads. Similar to failure-prone ball bearings, when cylindrical roller bearings are used for thrust control, the roller becomes compromised due to the limited surface contact area on the sides of the rollers. The results of using a cylindrical bearing for thrust control will be similar to all other ball bearing solutions.
In our patented system, we use a 15mm cylindrical bearing with thrust control that allows for the separation of the axial load from the radial load. Our roller bearings do NOT carry the axis load (thrust control) on the side, which leaves the roller free to carry only the radial load (main load). The axial load is carried exclusively on the entire permitter of the outer race. This results in a bearing that is not overloaded and will last the lifetime of the engine.
EPS recommends using this product in conjunction to the Rear Main #8 Seal and Housing
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
987997IMS62MM
The product you are viewing cross references to these numbers