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Chains & Tensioners

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DISPLAYING 17 to 28 (of 28 products)
1 2
Special Order item
99970734440
Product Information
Product Information
Chain adjuster sealing o-ring. 18,77 x 1,78
3 per engine. Price is for each.



Fits:
Porsche 996
Porsche 986 Boxster
Porsche 987 Boxster
Porsche 987C Cayman
Porsche 997.1 Gen

Click 'Zoom in' for large parts diagram.
Diagram ref no 25

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Related, superseded, cross reference or alternative numbers for comparison.

99970734440
99970734440

The product you are viewing cross references to these numbers
99970734440/1
Product Information
Product Information
O-ring - 18.77 x 1.78 - for timing chain adjuster or tensioner. 

Fits:

Porsche 986 Boxster / S 1997-04 - x3 required
Porsche 987 Boxster / S 2005-08 - x3 required
Porsche 987 Cayman / S 2006-08 - x4 required

Porsche 996 Carrera 1998-05 - x3 required
Porsche 997-1 Carrera 2005-08 - x4 required

Diagram ref. 25.



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Related, superseded, cross reference or alternative numbers for comparison.

99970734440
99970734440

The product you are viewing cross references to these numbers
Special Order item
99610519500
Product Information
Product Information
Tensioner Blade Pad.
1 per engine.



Fits:
Porsche 986 Boxster 1997-04
Porsche 987 MKI Boxster 2005-08
Porsche 987C MKI Cayman 2005-08
Porsche 996 Carrera 1998-05
Porsche 997 MKI Carrera 2005-08

Click picture for large parts diagram.
Diagram Ref No 19.
Special Order item
9A700836500
Product Information
Product Information
Tensioner Blade Screw M6
6 per engine. Price is for each.



Fits:
Porsche 986 Boxster / Boxster S 1997-04
Porsche 996 C2 / C4 / C4S 1998-05

Click picture for large parts diagram.
Diagram Ref No 31.

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Related, superseded, cross reference or alternative numbers for comparison.

9A700836500
99610516252
9A700836500

The product you are viewing cross references to these numbers
99610517552/1
Product Information
Product Information
Timing chain tensioner blade
OE Match replacement chain guide used within the engine timing system. It provides the wear surface the timing chain runs against while the hydraulic tensioner maintains correct chain tension. It supports and guides the timing chain, helping the tensioner maintain stable chain tension and reducing chain slap. This helps protect timing accuracy and contributes to quieter, smoother engine operation.
Sold each, 2 required per vehicle

Fits:
Porsche 986 Boxster 2.5L / 2.7L / 3.2L  1997 - 2002
Porsche 996 3.4L 1998 - 2002

Diagram ref no 30.

This OE Match tensioner blade is manufactured to OE-equivalent dimensions and guide profile to ensure correct chain tracking and compatibility with the original timing components. As the chain runs over the guide, the blade’s engineered surface minimises friction and noise while resisting wear from constant high-speed chain contact. It’s a key service item for M96 timing systems - ideal for rebuilds or preventative maintenance where aged guide material may become brittle or worn.

Fitted inside the timing case, the blade acts as a controlled contact surface for the chain while the tensioner applies pressure to keep the chain correctly tensioned. Maintaining proper guide condition helps prevent excessive wear debris and reduces the risk of poor chain control over time.

Tensioner blades are wear components. As they age, the guide surface can wear and shed material, which can affect chain control and create debris in the oil system. Renewing worn guides helps maintain stable timing chain behaviour and supports long-term timing system reliability.

When to replace:
•  During engine rebuild / timing service
•  Evidence of guide wear or debris in oil (plastic particles)
•  Timing system noise that indicates chain slap/rattle
•  High-mileage preventative maintenance



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

99610517552
99610517552

The product you are viewing cross references to these numbers
Special Order item
99610516555
Product Information
Product Information
Tensioner Blade. 1 per engine.



Fits:
Porsche 986 Boxster / Boxster S 1997-04
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 C2 / C4 / C2S / C4S 2005-08 COUPE/CABRIO

Click picture for large parts diagram.
Diagram Ref No 18.


This product supersedes Porsche's old part numbers:
- 996 105 165 54.
Special Order item
99610516651
Product Information
Product Information
Tensioner Blade.1 per engine.



Fits:
Porsche 986 Boxster / Boxster S 1997-04
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2006-08
Porsche 996 C2 / C4 / C4S 1998-05
Porsche 997 C2 / C4 / C2S / C4S 2005-08 COUPE/CABRIO

Click picture for large parts diagram.
Diagram Ref No 22.
Special Order item
99610517158
Product Information
Product Information
Tooth-Type Timing Chain Used To Connect The Engine’s Crankshaft To The Intermediate Shaft (IMS).

Fits:
Porsche 986 Boxster 2.7L 2001>>2004
Porsche 986 Boxster S 3.2L 2001>>2004 

Porsche 987.1 Boxster 2.7L MKI 2005>>2008
Porsche 987.1 Boxster S 3.2L MKI 2005
Porsche 987.1 Boxster S 3.4L MKI 2006>>2008

Porsche 987.1 Cayman 2.7L MKI 2005>>2008 
Porsche 987.1 Cayman S 3.4L MKI 2006>>2008

Porsche 996 Carrera 3.4L 2001
Porsche 996 Carrera 4 3.4L 2001
Porsche 996 Carrera 3.6L 2002>>2004
Porsche 996 Carrera 4 3.6L 2002>>2004
Porsche 996 Carrera 4S 3.6L 2002>>2005 
Porsche 996 Targa 3.6L 2002>>2005

Porsche 997.1 Carrera 3.6L MKI 2005>>2008
Porsche 997.1 Carrera S 3.8L MKI 2005>>2008
Porsche 997.1 Carrera 4 3.6L MKI 2006>>2008
Porsche 997.1 Carrera 4S 3.8L MKI 2006>>2008
Porsche 997.1 Targa 4 3.6L MKI 2007>>2008
Porsche 997.1 Targa 4S 3.8L MKI 2007>>2008

NOTE: For The 2001 Model Year, Porsche Replaced The Intermediate Shaft's Roller-Type (Duplex) Chain With A Tooth-Type Chain. This Listing Is For The Later Tooth-Type Chain And Is Not Compatible With Earlier Engines Equipped With The Roller-Type Chain.


While Unlikely, It's Possible That An Earlier Engine May Have Been Rebuilt And Upgraded To Use The Newer Chain Design. For This Reason, Design 911 Strongly Recommends Confirming Which Type Of Chain Your Engine Uses Before Placing An Order. To Assist With Identification, Our Product Images Include A Helpful Comparison Between The Roller-Type (Duplex) Chain And The Tooth-Type Chain.

Diagram Ref No 17  



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

99610517158
99610517156
99610517158

The product you are viewing cross references to these numbers
99610517158/1
Product Information
Product Information
Tooth-type timing chain used to connect the engine’s crankshaft to the intermediate shaft (IMS).

Fits:
Porsche 986 Boxster 2.7L 2001 - 2004
Porsche 986 Boxster S 3.2L 2001 - 2004 

Porsche 987-1 Boxster 2.7L 2005 - 2008
Porsche 987-1 Boxster S 3.2L 2005
Porsche 987-1 Boxster S 3.4L 2006 - 2008

Porsche 987-1 Cayman 2.7L 2005 - 2008 
Porsche 987-1 Cayman S 3.4L 2006 - 2008

Porsche 996-1 Carrera 3.4L 2001
Porsche 996-1 Carrera 4 3.4L 2001

Porsche 996-2 Carrera 3.6L 2002 - 2004
Porsche 996-2 Carrera 4 3.6L 2002 - 2004
Porsche 996-2 Carrera 4S 3.6L 2002 - 2005 
Porsche 996-2 Targa 3.6L 2002 - 2005

Porsche 997-1 Carrera 3.6L 2005 - 2008
Porsche 997-1 Carrera S 3.8L  2005 - 2008
Porsche 997-1 Carrera 4 3.6L 2006 - 2008
Porsche 997-1 Carrera 4S 3.8L 2006 - 2008
Porsche 997-1 Targa 4 3.6L 2007 - 2008
Porsche 997-1 Targa 4S 3.8L 2007 - 2008

Diagram ref. 17  

NOTE:
 For the 2001 model year, Porsche replaced the intermediate shaft's roller-type (duplex) chain with a tooth-type chain. This listing is for the later tooth-type chain and is not compatible with earlier engines equipped with the roller-type chain.

While unlikely, it's possible that an earlier engine may have been rebuilt and upgraded to use the newer chain design. For this reason,
Design 911 strongly recommends confirming which type of chain your engine uses before placing an order. To assist with identification, our product images include a helpful comparison between the roller-type (duplex) chain and the tooth-type chain.

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

99610517158
99610517156
99610517158

The product you are viewing cross references to these numbers
Special Order item
99610516804
Product Information
Product Information
Timing Chain Guide Rail.



Fits:
Porsche 987 Boxster / Boxster S 2005-08
Porsche 987C Cayman / Cayman S 2005-08
Porsche 996 C2/C4/C4S 3.6L 2002-05
Porsche 997 3.6L / 3.8L 2005-08 COUPE / CABRIO

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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

99610516804
99610516803
99610516804

The product you are viewing cross references to these numbers
SR222-GT3
Product Information
Product Information
Timing chain starp / support for Porsche 911

When assembling the case halves on the 911 engine STOMSKI RACING's SR222-GT3 Timing Chain Strap will prove instrumental in supporting the chain to allow easier mating of the halves. Proper length, radius bend, tension, and quality steel insure that this tool will provide reliable and consistent support for all your engine builds.

fits
• SR222-GT3 for the 996/997 GT2, GT3, and TT engines.
99610515
Product Information
Product Information

Timing chain tensioner blade
This OE Match timing chain tensioner blade is a replacement guide rail used within the engine timing chain system. It provides a controlled contact surface for the timing chain and works together with the chain tensioner to maintain correct chain position and tension.

Fits
Porsche 997.1 Carrera 3.8L 2005 - 2008
Porsche 987.1 Boxster 2.7L / 3.2L / 3.4L 2005 - 2008
Porsche 987C.1 Cayman 2.7L / 3.4L 2006 - 2008

Diagram ref no 30

What This Product Does

Located within the camshaft drive assembly, the blade provides a contact surface for the chain. It cooperates with the tensioning mechanism to control chain movement and support consistent tracking on applicable M96 / M97 flat-six engines.


Functions

  • Supports the chain along its intended route.
  • Transfers tensioner action through the blade.
  • Helps limit unwanted chain movement and vibration.
  • Contributes to stable camshaft drive operation.


Technical Details

  • 99610515600: Left bank, cylinders 1–3.
  • 99610515801: Right bank, cylinders 4–6.


Symptoms of Fault

  • Rattling or slapping sounds around the chain drive.
  • Visible scoring, fractures or missing sections on the blade.
  • Guide fragments discovered during oil-system inspection.
  • Timing deviation faults requiring further investigation.

These findings do not establish blade failure on their own; inspect the complete timing assembly before selecting replacement components.


Why Replacement Matters

Repeated chain contact, temperature changes and oil exposure can deteriorate the guiding surface. Renewing a damaged blade addresses wear at that contact point. OE Match provides a Porsche-focused replacement option, with application and specification checks forming part of its component assessment.

Consider blade renewal during chain-drive repairs, camshaft timing work or an engine rebuild when inspection identifies deterioration. Assess the chains, tensioners and neighbouring guides together rather than assuming one replacement will resolve every source of noise.


FAQs

Which reference should I select?
Match the original reference and cylinder bank: 99610515600 serves cylinders 1–3, while 99610515801 serves cylinders 4–6.

Does start-up noise prove the blade needs replacing?
No. Increasing or persistent rattling warrants diagnosis of the chain drive, including its tensioners and guides.

Should related guides be inspected?
Yes. Check adjoining timing components for wear whenever the assembly is accessible.



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

99610515
99610515801
99610515800
99610515600

The product you are viewing cross references to these numbers
DISPLAYING 17 to 28 (of 28 products)
1 2
Also found on these pages
About Chains & Tensioners

Precision Timing Chains & Tensioners – Engine Synchronisation and Reliability for Porsche Models

The timing chain system is one of the most critical components of a Porsche engine, ensuring perfect synchronisation between the crankshaft and camshafts. This precise coordination allows valves to open and close at the right moment, maintaining smooth power delivery, fuel efficiency, and long-term engine health.

At Design911, we supply a comprehensive range of precision-engineered timing chains, guides, and hydraulic tensioners designed to meet or exceed manufacturer performance standards. Each component is manufactured from high-strength materials for exceptional wear resistance and durability — vital for high-revving, performance-oriented Porsche engines.

What Do Timing Chains and Tensioners Do?

A timing chain connects the crankshaft to the camshafts, ensuring accurate valve timing. The tensioner keeps the chain taut to prevent slack, vibration, or noise, maintaining precise timing under all load conditions.

Core Functions:

  • Synchronise engine timing between the camshaft and crankshaft.
  • Maintain valve timing accuracy for optimal combustion and power.
  • Prevent chain slack and noise through hydraulic or spring-loaded tensioning.
  • Ensure long-term reliability in both performance and everyday driving.

Together, these components preserve the exacting standards of Porsche engine operation — vital for both power and longevity.

Why Do Timing Chains and Tensioners Fail?

Over time, wear, oil degradation, and heat cycles can cause timing components to deteriorate. When neglected, they may stretch, seize, or lose tension — leading to severe engine damage.

Common Causes of Failure Include:

  • Chain stretch or elongation, resulting in timing misalignment.
  • Worn or leaking hydraulic tensioners, causing chain rattle on start-up.
  • Contaminated or degraded engine oil, accelerating wear.
  • Broken chain guides from heat stress or material fatigue.
  • Insufficient oil pressure, reducing hydraulic tensioner performance.

A failing timing chain system can lead to poor performance, rough idling, check-engine lights, or — in extreme cases — catastrophic valve-to-piston contact.

Why Replace with Performance-Grade Timing Components?

Replacing aging timing components with manufacturer-quality parts ensures reliable valve timing, smoother operation, and peace of mind.

Key Benefits:

  • Restores precise valve timing for peak performance and efficiency.
  • Prevents engine noise and vibration caused by chain slack.
  • Protects against catastrophic engine damage due to chain failure.
  • Constructed from heat-treated, high-grade steel for long service life.
  • Engineered to match original timing profiles for Porsche engines.
  • Perfect fitment for classic air-cooled and modern water-cooled models.

Whether performing preventive maintenance or a complete rebuild, these timing chains and tensioners deliver race-ready reliability with road-tested durability.

Highlights:

  • Precision-engineered timing chains, guides, and tensioners for Porsche engines.
  • Restores timing accuracy and eliminates start-up rattle or misfire issues.
  • Built from heat-treated alloy steel for maximum longevity.
  • Hydraulic and mechanical tensioners available for various Porsche models.
  • Ideal for performance rebuilds and preventative maintenance.
  • Compatible with air-cooled and water-cooled Porsche engines.

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