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Chains & Tensioners

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DISPLAYING 1 to 16 (of 28 products)
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99610517353KIT
Product Information
Product Information
Chain Guide. SET OF 2
2x Guides, timing chain Piece 99610517353
2x Tensioner Guide, timing chain Piece 99610517552

Fits:
Porsche 986 Boxster  1997 - 2004
Porsche 996 1998 - 2005

Diagram Ref No 33 & 30

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99610517353KIT
99610517552
99610517353

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99610517353KIT1
Product Information
Product Information
Chain Guide. SET OF 2
2 x Guides, timing chain Piece 99610517353
2 x Tensioner Guide, timing chain Piece 99610517552

Fits:
Porsche 986 Boxster 1997 - 2004
Porsche 996 1998 - 2005

Diagram Ref No 33 & 30

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99610517353KIT1
99610517552
99610517353

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ENGINEKIT996T
Product Information
Product Information
Engine Timing Chain Kit.
This timing chain kit is designed for Porsche 996 Turbo 3.6L M96.70 engines requiring replacement of the timing chain and associated components. The kit  includes the timing chain, guides/rails and other essential timing drive hardware.

This overhaul kit ensures your engine’s timing system is brought back to proper specification — chain, guides, rails, tensioning path — all refreshed in one package.

Fits:

  • Porsche 996 TURBO 2000-05

Diagram Ref No 18, 21, 23, 24, 25

What These Products Do:
  • The timing chain system synchronises the crankshaft and camshafts (and sometimes intermediate shafts) so that valves open/close at the correct times relative to piston position.
  • The chain itself drives the cam from the crank or intermediate shaft. Guides/rails ensure the chain runs in the correct path, stays under tension, and minimises noise and wear.
  • Over time, the chain can stretch, guides can wear or fracture, tensioners can lose preload — which leads to timing slack, chain noise, and in worst cases mis-timing or catastrophic engine damage.
  • A full kit replacing the chain and guides resets the timing system back to proper specification — chain path, tension, alignment — thereby restoring performance, reliability, and longevity of the engine.

When You Should Consider Replacement:
  • You hear rattling or clattering from the front of the engine (timing cover area) during start-up, idle or under load — a classic sign of chain slack.
  • You experience poor engine performance, rough running or misfires linked to timing errors.
  • The engine has high mileage or long service history with original timing components — wear is cumulative and replacing early can prevent failure.
  • On inspection you find worn guides/rails (cracked plastic, split surfaces) or visible chain slack.
  • You catch related diagnostic trouble codes (DTCs) for camshaft timing or intermediate shaft etc.

Why Replacement Matters:
  • Protects the engine: Timing chain failure can lead to valve-to-piston contact, major engine damage and huge cost. Replacing the chain system early is preventive.
  • Restores correctly timed operation: With new chain/guides, your cam/valve timing is returned to spec; the engine runs smoother, more reliably, and with full power.
  • Eliminates noise & improves reliability: Worn guides or slack chain produce unacceptable noise and indicate impending failure. Replacing resolves these.
  • Cost-effective while open: Major labour is already required to access the timing chain; replacing only part of the system risks repeated labour later.



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ENGINEKIT996T
99610555271
99610503875
99610516571
99610516770
99610516670
99610503775

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99610551
Product Information
Product Information
Chain case gasket.

elring

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 2000-05
Porsche 997 Turbo 2007-09
Porsche 997 GT2 RS 2011
Porsche 997 GT3 / GT3 RS 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 16 (LEFT) or 17 (RIGHT)

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99610551
99610551372
99610551472
235.911
235.881

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Special Order item
99610530371
Product Information
Product Information
Actuator Camshaft.

porsche

Fits:
Porsche 996 Turbo
Porsche 996 GT3

Click 'Zoom in' for large parts diagram.
Diagram Ref No 23

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99610530371
99610530371

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Special Order item
99610531072
Product Information
Product Information
Actuator Valve Support.

porsche

Fits:
Porsche 996 Turbo 2001-05

Click 'Zoom in' for large parts diagram.
Diagram Ref No 27

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99610531072
99610531072

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99610530172
Product Information
Product Information
Actuator valve.

porsche

Fits:
Porsche 996 Turbo 2001-05

Click 'Zoom in' for large parts diagram.
Diagram Ref No 25

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99610530172
99610530172
99610530171

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Special Order item
96410517103
Product Information
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Bolt for chain tensioner blade. Fits left or right side. Sold each.

porsche

Fits:
Porsche 964 1989-94
Porsche 993 1994-98
Porsche 996 1998-04
Porsche 997.1 Turbo 2000-09
Porsche 997.2 Turbo 2010-13
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref 14

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96410517103
96410517103
96410517102

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Special Order item
99610551
Product Information
Product Information
Chain case gasket.

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 2000-05
Porsche 997 Turbo 2007-09
Porsche 997 GT2 RS 2011
Porsche 997 GT3 / GT3 RS 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 16 (LEFT) or 17 (RIGHT)

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99610551
99610551372
99610551472
235.911
235.881

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99610516
Product Information
Product Information
Chain guide rail.
This guide rail ensures the timing chain follows the correct path, maintaining chain alignment and tension over the life of the engine. The guide is engineered to resist wear from chain contact, vibration, thermal expansion and age. It installs into the existing timing cover without modification. It is used on the left/right-hand / lower side (depending on engine layout) and works in conjunction with the chain tensioners and other guide rails to keep valve timing accurate and engine operation smooth.

Fits:
Porsche 996 Turbo 2001 - 2005
Porsche 996 GT3 2000 - 2005
Porsche 997 Turbo 2007 - 2011
Porsche 997 GT3 2007 - 2011

Diagram ref no 21

Ideal for engine rebuilds, timing-chain replacements, or preventive maintenance on high-mileage engines.

This chain guide rail:
Guides the timing chain to follow the correct path between crankshaft, camshafts, and intermediate shafts - ensuring synchronised valve timing.
 Maintains chain tension and alignment under load and throughout thermal cycles, preventing chain slippage or jumping that could damage the engine.
 Reduces noise, rattles, and wear that occur when the chain rubs against incorrect or worn surfaces.
 Serves as a critical component for overall engine longevity and reliability, especially in high-mileage or performance-oriented engines.

Timing-chain guide rails wear over time due to constant metal-to-plastic/rubber contact, heat, and vibration. A worn guide rail can lead to:
 Chain misalignment, slippage or jumping - risking engine timing errors, valve-to-piston contact, or catastrophic engine damage
 Excessive timing noise, rattling, or vibration
 Premature wear on chain, sprockets, and tensioners - leading to costly repairs.

Replacing with a correctly spec’d guide rail restores proper chain pathing, prolongs timing-system life, and helps avoid severe engine damage.

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99610516
21260
21261
99610516670
99610516770

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99610516
Product Information
Product Information
Chain Guide Rail. Porsche 996 / 997

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 2000-05
Porsche 997 Turbo 2007-11
Porsche 997 GT3 2007-11

Click 'Zoom in' for large parts diagram.
Diagram ref no 21

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99610516
99610516670
99610516770

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Special Order item
99610517353
Product Information
Product Information
Chain Guide. 2 per engine.

porsche

Fits:
Porsche 986 Boxster
Porsche 996 1998-05

Click picture for large parts diagram.
Diagram Ref No 33.
99610517353/1
Product Information
Product Information
Chain guide.
2 per engine. Sold each.

oematch

Fits:
Porsche 986 Boxster
Porsche 996 1998-05

Click 'Zoom in' for large parts diagram.
Diagram Ref No 33.

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99610517353
99610517353
25606

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Special Order item
95910505104
Product Information
Product Information
Chain tensioner adjuster, LEFT.

porsche

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 3.6L 1999-05 (96.76 / 96.79)
Porsche 997.1 GT3 3.6L 2007-09 (97.76)
Porsche 959

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


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95910505104
95910505104
95910505101
95910505201
95910505204

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Special Order item
99614722371
Product Information
Product Information
Power steering pump pulley

porsche

Fits:
Porsche 996 Turbo 2000-2005
Porsche 996 GT3-1 1999-2005
Porsche 997 Gen 1 Turbo 2007-2009
Porsche 997 Gen 2 Turbo 2010-2013
Porsche 997 GT3-2 2007-2011

Related reference numbers
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99614722371
99614722371
996.147.223.71

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Special Order item
99610517552
Product Information
Product Information
Tensioner blade.
2 per engine. Sold each.

porsche

Fits:
Porsche 996 1998-05

Click 'Zoom in' for large parts diagram.
Diagram ref no 30.

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99610517552
99610517552
99610517552

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DISPLAYING 1 to 16 (of 28 products)
1 2
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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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