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Single Row IMS

IMS Bearing Replacement Solutions for Porsche Boxster, 996, and early 997 Models with the Factory Single Row IMS

Porsche Boxster and 911 models built between 2000 and 2005 with the factory single row 6204 IMS bearing can suffer catastrophic engine failures if the original IMS bearing isn't replaced as part of regular scheduled maintenance. This includes ball and roller bearing replacements. All IMS bearing upgrades other than the IMS Solution should have service interval even though Porsche never provided recommendations for when the IMS bearing should be replaced, let alone the tools or procedures to replace them. LN Engineering together with Flat 6 Innovations developed and patented IMS bearing solutions including the IMS Retrofit and IMS Solution that have been used successfully and trusted worldwide since 2008.


Where can I buy the Classic Single Row IMS Retrofit 106-08.2?

The patented Single Row Pro IMS Retrofit 106-08.2.2 released in 2012 supersedes the original Classic Single Row IMS Retrofit 106-08.2. The patented Single Row Pro replaces the original single row bearing with a custom dual row bearing that uses an internal wire lock to retain the bearing and requires the Faultless IMS Tool 106-08.22 for installation. Alternatively the RND RS Roller Cylindrical IMS Bearing 106-08.2R can be used in place of the original Classic Single Row IMS Retrofit which does not require any additional installation tools other than the IMS Pro Tool Kit 106-08.13.


Where can I learn more about the Single Row IMS Bearing in my Porsche Boxster or 911 engine?

LN Engineering's intermediate shaft (IMS) bearing FAQ has everything you need to know about your Porsche M96 engine's single row IMS bearing. Additional information on our replacements for the factory single row intermediate shaft bearing can be found on the IMS Retrofit or IMS Solution website.

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  1. Single Row Pro IMS Retrofit Kit for MY00-05 Porsche 986 Boxster and 996 911 Models

    SKU: 106-08.2.2

    $899.00

    The First. The Original. Patented. The IMS Retrofit. U.S. Patent 9,687,974 B2.

    Free 30-day IMS tool rental including RMS rear main seal installation tool is now included with purchase of IMS Retrofit and IMS Solution kits from LN Engineering along with your choice of Camshaft Plug and Tensioner Seal Set or Magnetic Drain Plug at no extra charge!

    The IMS Retrofit is a registered trademark of LN Engineering LLC and the original ceramic hybrid ball-bearing replacement for the M96/M97 engine.

    With half the load capacity of the early factory dual row bearing, it is clear to see that the reduced load capacity of the factory single row IMS bearing is a significant contributing factor to the increased number of failures.

    Logic would dictate the solution is to reduce the load or redesign using a bearing with more load capacity. Since we can’t lower the load capacity, installation of a dual row ball bearing is the logical evolution for the IMS Retrofit. Two rows are always better than one. What if you could put a dual row ball bearing in the place of a single row one? Now you can. Introducing the Single Row Pro IMS Retrofit Kit. Years in the making and developed simultaneously to the IMS Solution, the second generation, patented, Single-Row Pro IMS Retrofit provides an angular contact, dual row ceramic hybrid ball-bearing with 90% more load capacity and like all previous IMS Retrofit kits, additional benefits include reduced wear and longer service life provided by the ceramic hybrid bearing employed by the IMS Retrofit kit.

    Problem: IMS Failure. Solution: IMS Retrofit.

    Why buy an IMS Retrofit from LN Engineering?

    As of 2020, with 35,000 IMS Retrofit and 3000 IMS Solutions installed since 2008, our IMS bearing replacements are the most trusted and used by hundreds of independent mechanics and dealerships worldwide.

    LN Engineering offers fast and free shipping and has industry leading technical support. We also an IMS bearing replacement tool rental program, available exclusively to retail customers who purchase their IMS Retrofit or IMS Solution from the LN Engineering website.

    Why do IMS bearings fail?

    • Lack of lubrication as a sealed bearing was used by the factory. The IMS is submerged in engine oil, so elimination of the grease seal allows proper lubrication of the new bearing. No forced oiling is required!
    • Insufficient load capacity. The factory single row bearing had high failure rate of 8% according to the Eisen class action lawsuit compared to the factory dual row's 1% failure rate under warranty.
    • The factory did not supply a service interval, replacement, or tools and procedure for changing the original bearing out. The original bearing should have had a service interval!
    • The Single Row Pro has a 6 year or 75,000 mile service interval, whichever comes first.

    IMS Retrofit as preventative maintenance:

    • IMS replacement takes an average of 10-14 hours and requires the transmission to be removed. Tipronic 911 models require the engine and transmission to be removed as a complete unit to be able to separate engine and gearbox.
    • Typically coupled with clutch and other maintenance such as replacement of RMS, AOS, Water Pump, Dual Mass Flywheel, etc.
    • If an engine failure occurs, rebuilds take 60+ hours and can cost tens of thousands of dollars to fix. Once the IMS bearing has started to fail, it cannot be replaced safely as wear metal from the original bearing can damage the replacement bearing or other internal engine components.
    • Engines must be pre-qualified prior to bearing replacement. To learn more about pre-qualification, visit https://lnengineering.com/products/ims-bearing-installation-tools/ims-pre-qualification.html

    What is involved in replacing the intermediate shaft bearing?

    In this video, Bentley Publishers technical editor Nick Czerula and Rick Mikhail from Callas Rennsport show how to replace the Intermediate shaft (IMS) bearing on a Porsche 911 (996) using an IMS Retrofit. Please refer to the instructions provided for the particlar kit to be installed for specifics. This video covering the removal and installation of the intermediate shaft (IMS) bearing is provided by Bentley Publishers. For more information on Bentley Publishers line of Porsche technical manuals, visit http://www.bentleypublishers.com/

    Download Single Row Pro IMS Retrofit Installation Instructions.



    How is the Faultless IMS Tool used to install the Single Row Pro intermediate shaft bearing and internal wire lock?

    In this video, Jake Raby shows how the Single Row Pro IMS bearing is installed. This bearing is retained using an internal wire lock like the factory dual row, so a specialized tool and procedure is required to install the bearing and wire lock simultaneously.

    What factory bearing does my engine have?

    • 1997-1999: This engine featured a dual row bearing IMS.
    • 2000-2001: These engines came from the factory with either a dual row or a single row bearing IMS. A single row flange measures 19.27mm deep and a dual row flange measures 13.34mm deep.
    • 2002-2005: This engine featured a single row bearing IMS. Some late production 2005 models will have a non-servicable IMS.
    • 2006-2008: These engines were fitted with a larger bearing, readily identifiable by the 22mm center nut, that is not serviceable without a complete teardown of the engine. Removal of the IMS bearing grease seal will ensure proper lubrication of the original bearing.
    • If the engine in your car has been replaced, it will have whatever IMS bearing was in production for that model year of manufacture for the replacement engine.

    All other bearing replacements are just imitations.

    All genuine LN IMS Retrofit kits come laser etched, engraved, and serial numbered to validate their authenticity and feature custom-made, ceramic hybrid ball bearings made exclusively for LN Engineering. When it comes time to buy or sell your Boxster or 911, buyers and sellers both recognize the LN Engineering IMS Retrofit and IMS Solution as the first and original IMS bearing replacement for Porsche 986 Boxster and 996 911 models. LN Engineering maintains a database of all bearings sold and installations that are registered. Verify your installation at https://imsretrofit.com/ims-check/.

    2 YEAR / 24,000 MI LIMITED WARRANTY

    Warranty requires registration and compliance with program requirements. For more information and application guidelines please visit IMS Retrofit website


    Make sure you have proper tools for installation!

    This product requires: 106-08.13 IMS Pro Tool Kit and 106-08.22 Faultless Tools™ IMS Tool Kit

    Visit IMS Retrofit Installation Tools for more information on the tools required to carry out the IMS Retrofit procedure.

    Note: Free basic technical support is provided through our ticketing system. Assistance with the IMS procedure is not provided outside of directives and videos provided online. Advanced Technical Support (ATS) is a paid service where you can speak to an actual technician experienced with the IMS procedure and your vehicle to assist in case you run into a problem you cannot solve on your own.


    If you are looking for the Classic Single Row IMS Retrofit 106-08.2 (10.0124.200), it has been superseded by the Single Row Pro IMS Retrofit as of 01/01/2014 Learn More
  2. IMS Solution Bearing Replacement Kit for Single Row IMS MY00-05 Boxster & 911 Models

    SKU: 106-08.20

    $1,899.00

    DESIGNED FOR THE LIFE OF THE ENGINE. 5 YEARS / NO MILEAGE LIMIT WARRANTY

    NO MOVING PARTS. NO BALL BEARING. NO SERVICE INTERVAL. NO PROBLEM.

    Free 30-day IMS tool rental including RMS rear main seal installation tool is now included with purchase of IMS Retrofit and IMS Solution kits from LN Engineering along with your choice of Camshaft Plug and Tensioner Seal Set or Magnetic Drain Plug at no extra charge!

    Prevent costly engine failure by eliminating problematic ball-bearings or roller-bearings by backdating your IMS with a permanent, pressure fed oil lubricated plain bearing, just like in an aircooled Porsche. This patented design is the last IMS bearing you will ever need. Brought to you by the team that developed the original and often imitated IMS Retrofit™, the IMS Solution is the only permanent solution to catastrophic IMS bearing failures by complete omission of the problematic single row ball bearing and now the dual row ball bearing.

    The IMS Solution became the first Patented IMS Retroit product on the market, granted US Patent 8,992,089 B2 on March 31, 2015. The IMS Solution is also protected by US Patent 9,416,697 B2 and US Patent 9,909,469.

    Why buy an IMS Retrofit from LN Engineering?

    As of 2020, with 35,000 IMS Retrofit and 3000 IMS Solutions installed since 2008, our IMS bearing replacements are the most trusted and used by hundreds of independent mechanics and dealerships worldwide.

    LN Engineering offers fast and free shipping and has industry leading technical support. We also an IMS bearing replacement tool rental program, available exclusively to retail customers who purchase their IMS Retrofit or IMS Solution from the LN Engineering website.

    As featured on Motor Trend's Wheeler Dealers

    IMS Solution as preventative maintenance:

    • IMS replacement takes an average of 10-14 hours and requires the transmission to be removed. Tipronic 911 models require the engine and transmission to be removed as a complete unit to be able to separate engine and gearbox.
    • Typically coupled with clutch and other maintenance such as replacement of RMS, AOS, Water Pump, Dual Mass Flywheel, etc.
    • If an engine failure occurs, rebuilds take 60+ hours and can cost tens of thousands of dollars to fix. Once the IMS bearing has started to fail, it cannot be replaced safely as wear metal from the original bearing can damage the replacement bearing or other internal engine components.
    • Engines must be pre-qualified prior to bearing replacement. To learn more about pre-qualification, visit https://lnengineering.com/products/ims-bearing-installation-tools/ims-pre-qualification.html

    How do you install the IMS Solution?

    Download IMS Solution Installation Manual Download IMS Solution Installation Manual

    What factory bearing does my engine have?

    • 1997-1999: This engine featured a dual row bearing IMS.
    • 2000-2001: These engines came from the factory with either a dual row or a single row bearing IMS. A single row flange measures 19.27mm deep and a dual row flange measures 13.34mm deep.
    • 2002-2005: This engine featured a single row bearing IMS. Some late production 2005 models will have a non-servicable IMS.
    • 2006-2008: These engines were fitted with a larger bearing, readiliy identifiable by the 22mm center nut, that is not serviceable without a complete teardown of the engine. Removal of the IMS bearing grease seal will ensure proper lubrication of the original bearing.
    • If the engine in your car has been replaced, it will have whatever IMS bearing was in production for that model year of manufacture for the replacement engine.

    Take advantage of free tool rental when purchasing your IMS Solution from LN Engineering

    Note: Free basic technical support is provided through our ticketing system. Assistance with the IMS procedure is not provided outside of directives and videos provided online. Advanced Technical Support (ATS) is a paid service where you can speak to an actual technician experienced with the IMS procedure and your vehicle to assist in case you run into a problem you cannot solve on your own.

    Learn More
  3. Single Row RND RS Roller IMS Bearing Replacement Retrofit Kit

    SKU: 106-08.2R

    $799.00

    The only IMS roller bearing replacement kit with true thrust control.

    Cylindrical roller bearings provide great lateral load capacity, sacrificing their maximum load cap in thrust (axial movement). That’s why precise thrust control is crucial for bearing’s longevity and reliability. RND Roller Bearing IMS Retrofit kit is the only solution on the market that uses proper heat treated, 52100 bearing steel thrust surfaces on both sides. Features a genuine Koyo NUP204E. Only the best cylindrical roller bearing we could source for our RS Roller IMS Retrofit Kit.

    Manufactured by LN Engineering LLC for RND Engines, The RND RS Roller IMS Bearing Replacement sports a 2-year/24,000 miles limited parts warranty with professional installation, proper IMS procedure pre-qualification, and qualifying bearing registration. The RND RS Roller IMS Bearing Replacement has a recommended service interval 4 years or 50,000 miles, whichever comes first.

    Why do IMS bearings fail?

    • Lack of lubrication (sealed bearing was used)
    • Insufficient load capacity (factory single row bearing had high failure rate of 8% according to the Eisen class action lawsuit)
    • The factory did not supply a service interval, replacement, or tools for changing the original bearing out – bearing should have had a service interval!

    IMS Retrofit as a preventative maintenance:

    • IMS replacement takes an average of 10-14 hours.
    • Typically coupled with clutch and other maintenance.
    • Engine rebuilds take 60+ hours and can cost tens of thousands of dollars.
    • Engines must be pre-qualified prior to bearing replacement.

    What factory bearing does my engine have?

    • 1997-1999: This engine featured a dual row bearing IMS
    • 2000-2001: These engines came from the factory with either a dual row or a single row bearing IMS
    • 2002-2005: This engine featured a single row bearing IMS. Some late production 2005 models will have a non-servicable IMS.
    • 2006-2008: These engines were fitted with a larger bearing that is not serviceable without a complete teardown of the engine.
    • If the engine in your car has been replaced, it will have whatever IMS bearing was in production for that model year of manufacture for the replacement engine.

    Use IMS Pro Toolkit part number 106-08.13 for installation. No oil system modifications required!

    Download Instructions and Warranty form (150kB). If your browser doesn't support online form filling, please right click this link and save the form to your computer as a PDF file.

    Download Installation Manual from RND Engines website.

    Note: Free basic technical support is provided through our ticketing system. Assistance with the IMS procedure is not provided outside of directives and videos provided online. Advanced Technical Support (ATS) is a paid service where you can speak to an actual technician experienced with the IMS procedure and your vehicle to assist in case you run into a problem you cannot solve on your own.

    Learn More
  4. M96/M97 Camshaft Plug and Tensioner Seal Set

    SKU: 106-08.INSTALLKIT

    $28.26

    $18.75

    Pair of cylinder head camshaft end plugs and aluminum tensioner seals (crush ring/washer). Must be replaced when carrying out IMS Retrofit or IMS Solution procedure. Learn More
  5. Advanced Technical Support (ATS)

    SKU: 107-10

    $170.00
    If you require technical assistance while installing one of our products outside the scope of basic email-only technical support through our ticketing system, we offer our paid Advanced Technical Support (ATS) with one of our service technicians familiar with your Porsche model. ATS availability for phone support limited by technician availability and must be scheduled. Support outside of normal business hours is available. Price per hour, minimum one (1) hour. Learn More
  6. 5-Chain IWIS Timing Chain - Cam to Cam 97-01 Boxster 99-01 911

    SKU: 996-105-170-54

    $48.22

    $43.04

    Timing Chain (cam to cam) for 5-chain 97-02 Boxster (986) and 99-01 911 (996) models. These should be replaced whenever you are replacing the variocam wear pads. Qty 2 required (one per head). Learn More
  7. Genuine Porsche 5-Chain Variocam Wear Pads 97-01 Boxster 99-01 911

    SKU: 996-105-253-00

    $30.54
    When replacing your IMS bearing, it's a must to check your cam timing deviation while carrying out the pre-qualification procedure. Is the cam timing deviation on your 5-chain 97-02 Boxster (986) or 99-01 911 (996) over 4 degrees? It's time to change your variocam wear pads! Qty 2 Timing Chain Rail Set for Solenoid Actuated Chain Adjuster required (one per cylinder head). We also recommend changing the 4th and 5th timing chains while in there. Learn More
  8. Tiptronic Drive Plate Bolt to Crankshaft 10 X 1 X 25 mm (Set of 8) Porsche Boxster, Cayman, 911 1997-2008

    SKU: 999-073-091-01

    $23.00
    Anytime you remove the drive plate, you need to replace these bolts as they are torque to yield (TTY). Drive Plate Bolt - Drive Plate to Crankshaft (10 X 1 X 25 mm). Fits Porsche Boxster, Cayman, 911 1997-2008 All Tiptronic models. Sold as a set of 8. Learn More
  9. Porsche Boxster Cayman 911 M96/M97 Flywheel Bolt Crankshaft to Flywheel 10 X 50 mm (Set of 8)

    SKU: 999-073-092-02

    $19.20

    $14.00

    The stock flywheel bolts are torque to yield (TTY), so they need to be replaced every time they are removed. Part # 999 073 092 02 Cross Ref: 999-073-092-02 Set of 8 Flywheel Bolts Learn More
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