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Chains & Tensioners

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DISPLAYING 1 to 16 (of 31 products)
1 2
99310552900/2KIT
Product Information
Product Information
Camshaft timing chain kit.

oematch

Fits:
Porsche 964 1991-93 M64.01/0.2/03, M64.50
Porsche 993 1994-95 M96.05/06/07/08

This kit includes:
2x 99310552900/1
2x 96410504302/1
1x 96410503000/1

1x 96410502900/1
1x 96410508000/1
1x 96410507900/1
2x 90110554604/1
2x 90110512504/1



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Related, superseded, cross reference or alternative numbers for comparison.

99310552900
96410507900
96410507901

The product you are viewing cross references to these numbers
99310552900/4KIT
Product Information
Product Information
Camshaft timing chain kit.

oematch

Fits:
Porsche 964 1991-93 M64.01/0.2/03, M64.50
Porsche 993 1994-95 M96.05/06/07/08

This kit includes:
2x 99310552900/1
2x 96410504302/1
1x 96410503000/1

1x 96410502900/1
1x 96410508001/1
1x 96410507901/1



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Related, superseded, cross reference or alternative numbers for comparison.

99310552900
90110512504
90110554602
96410507900
96410508000
96410502900
96410503000
96410504302
90010010
50031696
09425
91110552900
90110552900
99310552900
96410507901

The product you are viewing cross references to these numbers
99310552900/5KIT
Product Information
Product Information
Camshaft timing chain kit.

oematch

Fits:
Porsche 964 1991-93 M64.01/0.2/03, M64.50
Porsche 993 1994-95 M96.05/06/07/08

This kit includes:
2x 99310552900/1
2x 96410504302/1
1x 96410503000/1

1x 96410502900/1
1x 96410508000/1
1x 96410507900/1
2x 90110554604/1
2x 90110512504/1
2x 
99610143570/1
2x 99610113780/1



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Related, superseded, cross reference or alternative numbers for comparison.

99310552900
99610113780
99610143570
90110512504
90110554604
96410507900
96410508000
96410502900
96410503000
96410504302
99310552900
96410507901

The product you are viewing cross references to these numbers
99310552900/1KIT
Product Information
Product Information
Camshaft timing chains. Fits left & right CLOSED TYPE.

oematch

TIP! If you detect a chain clap or rattling noise in the engine, your timing chain may be worn or stretched and needs replacing. each car has two

Fits:
Porsche 911 1965-89
Porsche 964 1991-93
Porsche 993 1994-97

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Related, superseded, cross reference or alternative numbers for comparison.

99310552900
99310552900
90110552900
91110552900

The product you are viewing cross references to these numbers
96410507980KIT
Product Information
Product Information
Chain tensioner adjuster.
(SET OF 2 LEFT & RIGHT)

oematch

Fits:
Porsche 964 1989-94
Porsche 964 Turbo 1993-94 3.6L
Porsche 964 RS
Porsche 993 1994-98

Click 'Zoom in' for large parts diagram.
Diagram Ref no 9 and 10.

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

96410507980KIT
96410507900
96410508000
21830
21831
96410507901

The product you are viewing cross references to these numbers
Special Order item
96410517103
Product Information
Product Information
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

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

96410517103
96410517103
96410517102

The product you are viewing cross references to these numbers
96410708821PRM
Product Information
Product Information
Timing chain tensioner oil bridge with o-ring kit.
Premium Aluminium Construction. You will need 2 per car.

oematch

Fits:
Porsche 964 3.6L C2 / C4 / RS 1989-94

Engine Set includes:
964 107 088 21 Al bridges
999 707 288 40 O-rings
999 701 909 40 O-rings

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

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

96410708821PRM
96410708821
99970728840
99970190940

The product you are viewing cross references to these numbers
Special Order item
91110552951
Product Information
Product Information
Camshaft Timing Chain With Master Link.

Fits:
Porsche 911 1965>>1989
Porsche 964 1991>>1993

Diagram Ref No 1

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

91110552951
91110552950
90110552950
91110552951

The product you are viewing cross references to these numbers
99310552900/1
Product Information
Product Information
Camshaft Timing Chain. CLOSED TYPE.
OE Match camshaft timing chain - the primary chain that connects the crankshaft to the camshaft(s) and synchronises their rotation. It corresponds to Porsche OEM ref 993.105.529.00, which was used in Porsche 911 1965 - 1997 models.
Fits left or right. Sold each.

Fits:
Porsche 911 1965 - 1989
Porsche 964 1991 - 1993
Porsche 993 1994 - 1997

Diagram ref no 1

The camshaft timing chain is a critical engine component that maintains precise timing between the crankshaft and camshaft(s). This timing governs when the engine’s intake and exhaust valves open and close relative to piston position - a key factor in efficient combustion, engine power, emissions, and overall drivability. The chain connects the rotating crankshaft to the camshafts so that valve timing is mechanically linked and constant.

Function:
Synchronises engine timing: Maintains crankshaft-to-camshaft rotation alignment
 Supports combustion efficiency: Ensures accurate valve events for intake and exhaust strokes
 Transfers mechanical drive: From crankshaft to camshaft drive mechanisms
 Withstands high loads: Engine torque and RPM forces over long service life.

Unlike timing belts, timing chains are metal-to-metal and designed for durability, although they can stretch or wear with high mileage or inadequate lubrication.

The timing chain is at the heart of the engine’s mechanical timing system. While chains are generally long-lasting, wear can occur due to mileage, heat cycling, lubrication contamination, or slack from chain stretch. A worn or stretched timing chain can lead to:
  Incorrect valve timing
  Engine noise (rattle at startup or idle)
  Reduced power and efficiency Irregular idle and misfires
  Potential catastrophic engine damage if timing deviates too far.

Replacing a worn chain with an OE Match unit restores correct timing precision and helps protect major internal engine components.

When to replace. Install a new timing chain when:
  There is timing chain noise (rattling) at startup or idle
  Chain tensioner or guides are being replaced
  Engine has high mileage with original timing components
  You are performing engine rebuild, top-end service, or head removal
  Diagnostic codes indicate timing inconsistencies

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

99310552900
99310552900
90110552900
91110552900
50031696
50032491

The product you are viewing cross references to these numbers
Special Order item
99310552900
Product Information
Product Information
Camshaft timing chain. Fits left or right CLOSED TYPE.

porsche

TIP! If you detect a chain clap or rattling noise in the engine, your timing chain may be worn or stretched and needs replacing. each car has two

Fits:
Porsche 911 1965-89
Porsche 964 1991-93
Porsche 993 1994-97

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

99310552900
99310552900
90110552900
91110552900
09425

The product you are viewing cross references to these numbers
90110552902/1
Product Information
Product Information
Camshaft Timing Chain. Fits left or right CLOSED TYPE.  Reinforced for Motorsport

oematch

TIP! If you detect a chain clap or rattling noise in the engine, your timing chain may be worn or stretched and needs replacing. each car has two

Fits:
Porsche 911 1965-89
Porsche 964 1991-93
Porsche 993 1994-97

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

90110552902
99310552900
90110552900
91110552900
90110552902

The product you are viewing cross references to these numbers
91110552951/1
Product Information
Product Information
Camshaft timing chain. SPLIT TYPE.
Chain Type: Duplex,
Timing Chain Size: D67ZN
No. of chain links: 98

Fits:
Porsche 911 1965 - 1989
Porsche 964 1991 - 1993

TIP! If you detect a chain clap or rattling noise in the engine, your timing chain may be worn or stretched and needs replacing. Each car has two.

This OE Match camshaft timing chain is a replacement split-type timing chain for air-cooled Porsche 911 engines. It is designed to match the original-style fit and function, helping maintain correct camshaft timing and reliable valve train operation.

The camshaft timing chain links the crankshaft drive to the camshaft drive system, ensuring that the camshafts rotate in precise timing with the engine crankshaft. This correct timing allows the engine valves to open and close at the right moment for smooth running, correct combustion, and dependable engine performance.

Functions
•  Drives the camshaft timing system
 Helps keep crankshaft and camshaft timing synchronised
•  Supports correct valve opening and closing timing
•  Helps maintain smooth engine running and performance
•  Provides a split-type design for easier installation during service
•  Replaces stretched, worn, noisy, or damaged timing chains
•  OE Match replacement for engine rebuilds and timing chain repairs

Why Replace This Part?
Camshaft timing chains are subject to constant load, heat, oil exposure, and high-speed operation. Over time, the chain can stretch, wear, become noisy, or affect accurate cam timing. A worn timing chain may cause rattling noises, poor running, incorrect valve timing, or reduced engine performance. Replacing the chain during engine service or rebuild helps restore timing accuracy and long-term reliability.

When to Replace This Part
•  The timing chain is stretched, worn, noisy, or damaged
•   There is rattling from the cam chain housing area
•   Camshaft timing is being reset or corrected
•   The engine is being rebuilt or overhauled
•   Chain ramps, sprockets, or tensioners are being replaced
•   The timing chain covers or camshaft housings have been removed
•   As preventative replacement during major engine service.

Where it fits on the car
This timing chain fits inside the engine timing chain housing, forming part of the camshaft drive system. It runs between the crankshaft-driven intermediate shaft sprocket and the camshaft sprocket assembly, depending on the engine layout.

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

91110552951
91110552950
90110552950
91110552951

The product you are viewing cross references to these numbers
Special Order item
99970728840
Product Information
Product Information
Chain housing O-ring, 6 x 2.5 mm  
This original Porsche O-ring is used in the chain housing / oil bridge sealing area, helping prevent oil leaks and maintain correct sealing around the timing chain housing assembly.
Sold individually

Fits:
Porsche 964 1989 - 1994
Porsche 993 1994 - 1998

Diagram ref no 22

What This Part Does / Functions
•  Seals the chain housing / oil bridge connection
•  Helps prevent engine oil leaks
•  Supports correct sealing around the timing chain housing area
•  Helps maintain clean and reliable engine operation
  Replaces a hardened, flattened, cut or leaking original O-ring
•  Provides correct OE Porsche size, material and fitment
•  Supports correct reassembly after chain housing or oil bridge service
•  Helps maintain factory engine sealing performance.

Why Replace This Part?
O-rings are exposed to engine oil, heat, pressure and age-related hardening. Over time, the seal can flatten, crack, swell or lose elasticity. Once the chain housing or oil bridge area has been disturbed, the O-ring should normally be replaced to ensure a reliable seal when reassembled. Replacing it with a Genuine Porsche OE chain housing O-ring helps prevent oil leaks and supports correct engine sealing.

Common Symptoms of a Failed Chain Housing O-Ring
•   Oil leak around the chain housing area
•   Oil residue near the oil bridge or chain tensioner area
•   Persistent seepage after previous engine work
•   Hardened, flattened or cracked O-ring during inspection
•   Oil smell from hot engine components
•   Oil drips underneath the vehicle
•   Seal damage after chain housing service
•   Need to reseal the oil bridge / chain housing connection.

When to Replace This Part
•   When removing or refitting the chain housing components
•   During chain housing, oil bridge or chain tensioner service
•   If oil leakage is traced to the chain housing sealing area
•   If the O-ring is hardened, flattened, cracked or damaged
•   During engine rebuild or top-end repair
•   When replacing related timing chain housing sealing components
•   After separating the oil bridge from the chain housing

Where It Fits on the Car
This O-ring fits in the engine chain housing / oil bridge sealing area. It is used around the timing chain housing system on the flat-six engine and helps seal the oil passage connection where specified. Correct installation is important. The sealing surfaces should be clean, and the O-ring should be fitted without twisting, pinching or damage.

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

99970728840
99970728840

The product you are viewing cross references to these numbers
99970728840/1
Product Information
Product Information
Chain housing O-ring, 6 x 2.5 mm  
OE Match chain housing O-ring for Porsche 964 and 993 models from 1989 to 1998. This replacement sealing O-ring helps prevent oil leaks around the timing chain housing area and supports correct engine sealing during service or rebuild work.
Sold individually, 2 required per vehicle

Fits:
Porsche 964 1989 - 1994
Porsche 993 1994 - 1998

Diagram ref no 22

The chain housing O-ring seals the chain housing connection to help prevent engine oil seepage or leakage. A correctly fitted O-ring supports clean engine operation, oil system integrity, and reliable sealing around the timing chain area.

Functions
•  Replaces the chain housing O-ring
•  Helps seal the timing chain housing area
•  Supports correct engine oil sealing
•  Helps prevent oil leaks and seepage
•  Suitable for timing chain housing, engine sealing, or rebuild service
•  Replaces hardened, flattened, cracked, swollen, or damaged
•  O-rings OE Match replacement for Porsche 964 and 993 engine repair.

Why Replace This Part?
Chain housing O-rings are exposed to engine heat, oil pressure, age, vibration, and repeated heat cycles. Over time, the O-ring can harden, flatten, crack, swell, or lose its sealing ability. A worn or damaged O-ring may cause oil residue, oil drips, engine bay contamination, low oil level concerns, or failed inspection. Replacing the O-ring helps restore proper sealing and prevent repeat oil leaks.

When to Replace This Part
•   Oil is leaking around the chain housing area
•   Timing chain housing service is being carried out
•   Engine rebuild or resealing work is in progress
•   The original O-ring is hardened, flattened, cracked, swollen, or damaged
•   Oil residue is visible around the timing chain cover or housing
•   Preventative replacement is required during engine service
•   The vehicle is undergoing Porsche 964 or 993 engine restoration.

Where it fits on the car
This O-ring fits within the engine timing chain housing assembly on Porsche 964 and 993 models. It forms part of the engine oil sealing system around the chain housing area.

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

99970728840
99970728840

The product you are viewing cross references to these numbers
9641050
Product Information
Product Information
Chain tensioner adjuster. 
The OE Match timing chain adjuster (also known as a chain tensioner adjuster) is an engine timing component used in Porsche 964 and Porsche 993 models. These adjusters help maintain the correct tension in the engine’s timing chain system, ensuring accurate synchronization between the crankshaft and camshafts.

Fits:
Porsche 964 1989 - 1994
Porsche 964 Turbo 1993 - 1994 3.6L
Porsche 964 RS
Porsche 993 1994 - 1998

Diagram Ref no 9 and 10.

The OE Match versions correspond to Porsche reference numbers 96410507900 / 96410507901 (left side) and 96410508000 / 96410508001 (right side) and are designed as direct replacements for the original factory components.

The timing chain adjuster is part of the camshaft timing system used in air-cooled Porsche flat-six engines. The component works together with the timing chain tensioner and guide rails to keep the chain correctly tensioned as the engine operates.

Each engine uses separate left and right adjusters, depending on the cylinder bank.

The chain adjuster maintains the proper position and tension of the timing chain, preventing slack or vibration within the timing assembly. By keeping the chain properly tensioned, it helps ensure precise valve timing and smooth engine operation.

Replacing worn adjusters helps prevent timing chain noise, improves reliability and protects critical engine components from excessive wear.

Function
Timing Chain Tension Control: Maintains proper tension in the camshaft timing chain
 Valve Timing Accuracy: Ensures correct synchronization between crankshaft and camshafts
 Engine Protection: Prevents chain slack, vibration and premature wear
 Smooth Operation: Helps eliminate chain rattle and timing instability

Timing components are constantly exposed to engine heat, oil pressure and mechanical load. Over time adjusters can wear or lose precision, leading to timing chain noise, unstable valve timing or reduced engine performance. Replacing worn chain adjusters ensures proper tensioning of the timing chain and helps protect the engine’s internal components.

Consider replacing the timing chain adjuster when:
  Timing chain rattle or knocking noise appears
  Performing timing chain or tensioner replacement
  During engine rebuild or top-end service
  High-mileage engines with original timing components


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

9641050
96410507900
96410508000
96410507901
96410508001

The product you are viewing cross references to these numbers
Special Order item
9641050
Product Information
Product Information
Chain tensioner adjuster. Porsche 964 / 993

porsche

Fits:
Porsche 964 1989-94
Porsche 964 Turbo 1993-94 3.6L
Porsche 964 RS
Porsche 993 1994-98

Click 'Zoom in' for large parts diagram.
Diagram Ref no 9 and 10.

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

9641050
96410507900
96410508000
21830
21831
96410507901
96410508001

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 31 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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