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Chains & Tensioners
By OE Match
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610516
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 / GT3 RS 2007-09
Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT3 2000-05
Porsche 997 GT3 2007-11
Diagram Ref No 18
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610516571
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
Timing Chain
OE Match timing chain for the valve control system of Porsche 996 Turbo and 996 GT2 models from 2001–05. It replaces OE reference 99610555271, with two chains required per engine.cc
2 per engine. Price is for each
Fits:
Porsche 996 Turbo 200 - 2005
Porsche 996 GT2 2001 - 2005
Diagram ref no 23
What This Product Does
The timing chain forms part of the engine's valve control assembly, mechanically linking rotating timing components so that the camshafts remain synchronised with the crankshaft and intermediate shaft. Correct chain condition is essential for maintaining the specified valve timing.
Functions
- Transfers drive through the engine timing system
- Maintains camshaft and crankshaft synchronisation
- Supports accurate valve opening and closing
- Works with the timing sprockets, guides and tensioning components
Technical Details
- Brand: OE Match
- Part type: engine timing chain
- OE reference: 99610555271
- Application: Porsche 996 Turbo and 996 GT2, 2001–05
- Quantity required: 2 per engine
- Price is for each
Symptoms of Fault
- Rattling or persistent chain noise, particularly during start-up
- Rough running caused by timing deviation
- Timing-related fault codes or warning lights
- Noise that becomes more noticeable as engine speed or load increases
- Metallic debris discovered during oil or filter inspection
- Visible wear affecting associated guides or sprockets
Why Replacement Matters
A worn or elongated timing chain can introduce unwanted movement into the valve timing system. Replacement may be required during an engine rebuild, when abnormal chain noise is diagnosed or when related guides and tensioning parts show wear. Inspecting the surrounding sprockets, guides, tensioners and fixings at the same time can help identify supporting components that also require renewal.
FAQs
- How many chains are needed?
Two are required per engine. This product is supplied individually. - Should other timing components be inspected?
Yes. Guides, sprockets and tensioning components should be checked for wear while the timing system is accessible. - Does a brief start-up rattle always indicate chain failure?
Not necessarily. Oil pressure, tensioner condition and other timing components should be assessed before parts are replaced.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610555271
The product you are viewing cross references to these numbers
OEMatch Chains & Tensioners — Fit, Function, Confidence
Timing chains, guides and tensioners keep a Porsche engine’s valve timing correct across a wide range of operating conditions. This group of parts is specified for durability and stable timing under load; replacement is common during major service or when symptoms such as rattle, rough idle or diagnostic codes point to timing system wear.
Available Types- Timing chains for petrol engines
- Tensioner kits, hydraulic and mechanical
- Chain guides and rails
- Complete timing chain kits with seals and fasteners
OE (Original Equipment) refers to parts matching original specifications for the chains & tensioners and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM chains & tensioners engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. In practice, the timing chain system synchronises the crankshaft and camshafts, the guides control chain run and alignment, and the tensioner maintains correct chain tension to prevent slack, noise and timing drift under varying oil pressure and temperature conditions.
- Restores accurate valve timing and smoother running
- Reduces start-up rattle and in-service chain noise
- Limits the risk of valve-to-piston contact from excessive chain slack
- Chain stretch or elongation from long service life
- Worn or leaking hydraulic tensioners losing damping or pressure
- Abrasion or breakage of guides due to heat and contamination
- Oil degradation or low oil pressure accelerating component wear
- Parts matched to Porsche timing-system specifications where applicable
- Options for hydraulic and mechanical tensioning arrangements
- Complete kits simplify overhaul work by including guides, seals and fixings
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Intermediate shaft (IMS)
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