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Chains & Tensioners

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DISPLAYING 17 to 26 (of 26 products)
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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.
Special Order item
99710506171
Product Information
Product Information
Timing chain tensioner. LEFT.



Fits:
Porsche 997.1 Turbo / GT2 2007-09
Porsche 997.2 Turbo / GT2 2010-13
Porsche 997 GT3 2007-11

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

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99710506171
95910505103
99710506171
99710506170

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99710506171/1
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Product Information
Timing chain tensioner. LEFT.

Fits:
Porsche 997.1 Turbo / GT2 2007-09
Porsche 997.2 Turbo / GT2 2010-13
Porsche 997 GT3 2007-11

Diagram ref no 7

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Related, superseded, cross reference or alternative numbers for comparison.

99710506171
95910505103
99710506171
99710506170

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Special Order item
99710506271
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Product Information
Timing chain tensioner. RIGHT.



Fits:
Porsche 997.1 Turbo / GT2 2007-09
Porsche 997.2 Turbo / GT2 2010-13
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 10

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Related, superseded, cross reference or alternative numbers for comparison.

99710506271
99710506271
99710506270
95910505203

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99710506271/1
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Product Information
Timing chain tensioner. Cyl. 4-6. RIGHT.
This OE Match timing chain tensioner is a direct replacement for the original Porsche component fitted to the right-hand cylinder bank (cylinders 4–6). It maintains proper tension on the engine timing chain to ensure precise camshaft timing and smooth engine operation.

Fits:
Porsche 997.1 Turbo / GT2 2007 - 2009
Porsche 997.2 Turbo / GT2 2010 - 2013
Porsche 997 GT3 2007 - 2011

Diagram ref no 10

The timing chain tensioner maintains the correct tension on the engine timing chain, ensuring accurate synchronisation between the crankshaft and camshafts. This helps the engine run smoothly, prevents chain slack, and protects against timing-related engine damage.

Function
•  Maintains correct timing chain tension
•  Prevents chain slack and timing fluctuation
•  Ensures accurate camshaft and crankshaft synchronisation
•  Reduces timing chain vibration and noise
•  Supports reliable high-performance engine operation

Position: Right side / cylinders 4–6
OE reference: 99710506271
Supersedes: 99710506270, 95910505203
Recommended gasket/seal: 99610517270 (sold separately)
Quantity required: 1 per engine side

Over time, timing chain tensioners can wear internally or lose hydraulic pressure efficiency. A failing tensioner may cause timing chain noise, inaccurate valve timing, or excessive chain movement, potentially leading to severe engine damage. Replacing a worn tensioner restores correct timing stability, protects internal engine components, and maintains performance reliability.

When to replace
•  Rattling noise from timing chain area during startup
•  Timing-related fault codes or irregular engine timing
•  During engine rebuild or timing system service
•  Excessive timing chain slack detected
•  Oil leakage around tensioner housing

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

99710506271
99710506271
99710506270
95910505203

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9A110514203/1
Product Information
Product Information
Timing chain
OE Match timing chain for Porsche Boxster, Cayman, 997, and 991 models. This replacement timing chain helps maintain accurate camshaft timing and reliable engine operation.
Sold individually

Fits:
Porsche 987.2 Boxster 2009 - 2012
Porsche 981 Boxster 2012 - 2016
Porsche 987C.2 Cayman 2009 - 2012
Porsche 981C Cayman 2013 - 2016
Porsche 997.2 2009 - 2012
Porsche 991.1 2012 - 2016

Diagram ref no 1

The timing chain synchronises engine rotation between the crankshaft and camshafts. Correct timing chain operation is essential for accurate valve timing, smooth running, engine performance, and long-term reliability.

Functions
• Replaces the engine timing chain
• Helps synchronise crankshaft and camshaft movement
• Supports accurate valve timing
• Helps maintain smooth engine running and performance
• Used during timing chain, camshaft drive, or engine rebuild service
• Replaces stretched, noisy, worn, or damaged timing chains
• OE Match replacement for Porsche engine timing system repair.

Why Replace This Part?
Timing chains are highly loaded engine components and can wear, stretch, become noisy, or suffer damage over time. A worn or stretched timing chain may cause timing noise, poor running, fault codes, reduced performance, or incorrect camshaft timing. Replacing the timing chain helps restore correct engine timing and protects related timing system components.

When to Replace This Part
•  Timing chain noise or rattle is present
•  Timing chain stretch is detected
•  Camshaft timing faults or related engine codes are present
•  Engine performance is reduced or running is uneven
•  Timing chain guides, tensioners, or camshaft drive parts are being replaced
•  Engine rebuild or major timing service is being carried out
•  Preventative replacement is required during Porsche engine maintenance

Where it fits on the car
This timing chain fits within the engine timing / camshaft drive system on Porsche Boxster, Cayman, 997, and 991 models. Exact chain position can vary depending on engine type and timing layout.

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

9A110514203
9A110514203
9A110514202

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Special Order item
99710555190
Product Information
Product Information
Timing chain.

Fits:
Porsche 997 GT3 RS 3.8L 2010>>
Porsche 997 GT3 RS 2011>>
Porsche 997 GT3 Cup 3.8L 2010>>
Porsche 991.1 GT3 Cup 3.8L 2013-16

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

99710555190
99710555190

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99710555190/1
Product Information
Product Information
Timing Chain.
The IWIS Timing Chain is a replacement internal engine timing component for compatible Porsche applications. It forms part of the engine's mechanical timing drive and helps maintain the precise synchronisation required between associated rotating and valve-train components.

Fits:
  • Porsche 997 MK1 GT3 / GT3 RS 2007-09
  • Porsche 997 MKII GT3 / GT3 RS 2010-11
  • Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16  

Diagram Ref No 27

Timing chains are designed for extended service life, but they operate continuously whenever the engine is running. Repeated mechanical loading, friction, heat and lubrication conditions can gradually cause wear to the chain pins, links and contact surfaces. Associated guides, tensioners and sprockets can also deteriorate over time.

As wear develops, the chain's effective length can increase, creating excessive slack and potentially affecting timing accuracy. Severe deterioration can allow the chain to jump, derail or fail, creating a risk of significant internal engine damage.

What This Product Does:
The timing chain transfers rotational movement through the engine timing system while maintaining the required mechanical relationship between associated components.

Depending on the specific engine configuration, it helps support:

  • Accurate engine timing
  • Correct camshaft operation
  • Correct valve timing
  • Reliable mechanical synchronisation
  • Consistent rotational drive
  • Smooth engine operation
  • Stable combustion
  • Consistent power delivery

Correct chain tension, adequate lubrication and accurate engagement with the associated sprockets are essential for dependable timing-system operation.

Symptoms Of Wear Or Failure:
Possible symptoms of timing-chain or associated timing-system wear include:

  • Metallic rattling or clattering
  • Rattle during cold starts
  • Noise immediately after engine start-up
  • Mechanical noise from the timing area
  • Excessive chain slack
  • Timing-chain elongation
  • Noise that changes with engine RPM
  • Rough or irregular engine operation
  • Unstable idle
  • Difficult starting
  • Reduced engine performance
  • Misfires
  • Engine warning light
  • Timing-related diagnostic fault codes
  • Camshaft-position faults
  • Crankshaft/camshaft correlation faults
  • Variable camshaft timing faults where applicable
  • Visible chain wear during inspection
  • Worn or damaged chain guides
  • Abnormal sprocket wear
  • Metal or plastic debris in the engine oil or oil filter

These symptoms do not automatically mean the chain itself has failed. Guides, tensioners, sprockets, lubrication problems and other engine faults can produce similar symptoms, making correct diagnosis important.

Why Replacement Matters:
The timing chain is a critical internal engine component. Once excessive wear, elongation or physical damage has been confirmed, replacement is important for restoring dependable timing-system operation.

Replacing a worn IWIS Timing Chain can help:

  • Restore reliable mechanical synchronisation
  • Maintain accurate engine timing
  • Restore correct chain operation
  • Reduce excessive chain slack
  • Reduce abnormal timing-chain noise
  • Maintain reliable sprocket engagement
  • Protect timing-chain guides
  • Protect associated sprockets
  • Reduce the risk of timing deviation
  • Reduce the risk of the chain jumping
  • Reduce the risk of chain derailment
  • Support smooth engine operation
  • Protect expensive internal engine components

Continuing to operate an engine with a confirmed timing-chain problem may allow deterioration to progress and substantially increase the cost of the eventual repair.



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

99710555190
99710555190

The product you are viewing cross references to these numbers
Special Order item
9A110514203
Product Information
Product Information
Timing Chain. Crankshaft To Cam. EACH.



Fits:
Porsche 987.2 Boxster
Porsche 981 Boxster
Porsche 987C.2 Cayman
Porsche 981C Cayman
Porsche 997.2
Porsche 991.1

Price is for each.

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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

9A110514203
9A110514203
9A110514202

The product you are viewing cross references to these numbers
Special Order item
99907365001
Product Information
Product Information
Torx screw M5x12 throttle control element. 



Fits:
Porsche 987.2 Boxster / Cayman - 2009 to 2012
Porsche 981 Boxster / Cayman - 2012 to 2016
Porsche 718 Boxster / Cayman  - 2017 Onwards
Porsche 997.2 - 2009 to 2012
Porsche 991 - 2012 to 2018


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

99907365001
99907365001

The product you are viewing cross references to these numbers
DISPLAYING 17 to 26 (of 26 products)
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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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