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Porsche > 996 (911) (1997-2005) > Engine Rebuild Parts >

Cylinder Liner

Cylinder Liner

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DISPLAYING 1 to 7 (of 7 products)
Cast Iron cylinder repair liners Porsche 996 3.4L / 3.6L - L3420
2
Cast Iron cylinder repair liners Porsche 996 3.4L / 3.6L
Black Friday Sale
L3419
Product Information
Product Information
Cast Iron cylinder repair liners Porsche 996 3.4 / 3.6, 96.00mm Bore, flanged liner (No cutouts). 


westwood

Fits:
Porsche 996 3.4L Price is Each
Porsche 996 3.6L Price is Each
Porsche 997 3.6L Price is Each
Porsche Cayman 3.4L Price is Each
Porsche Boxster 3.4L Price is Each

Inside Diameter 96.00mm / 3.779inch
Outside Diameter 101.20mm / 3.984inch
Length 128.00mm / 5.039inch
Flange Diameter 106.65mm / 4.199inch
Flange Depth 5.00mm / 0.197inch

NEW Cast Iron cylinder liners suitable for repairing damaged Alusil bores in 996 engines.

These liners are becoming very popular, with increasing numbers of cars suffering from scoring in the bores.

The liners will need to be fitted by a professional machine shop. You will not need to get special pistons or rings, as the original spec ones can be used with these cast iron liners.

Ductile Iron cylinder liners Porsche 996 3.6L / 997 3.6L
1
Ductile Iron cylinder liners Porsche 996 3.6L / 997 3.6L
Black Friday Sale
L3539/43
Product Information
Product Information
Ductile Iron cylinder liners Porsche 996 3.6L / 997 3.6L
Engine 3.6L, 96.00mm Bore, Ductile Iron flanged liners (With Hole and cutouts machined)

westwood

Fits:
Porsche 996 3.6L Price SET OF 6
Porsche 997 3.6L Price SET OF 6

Inside Diameter 96.00MM / 3.779inch

NEW Ductile Iron cylinder liners suitable for repairing damaged Alusil bores in 996 engines.

These New Ductile liners now have the cutouts and gudgeon pin hole already pre machined into the liners. The liners will only need to be bored and honed after fitment.

These liners are becoming very popular, with increasing numbers of cars suffering from scoring in the bores.

The liners will need to be fitted by a professional machine shop. You will not need to get special pistons or rings, as the original spec ones can be used with these Ductile liners.
Forged Piston & Liner Set for 3.8L Conversion for Porsche 996 Turbo & GT2 / 997-1 Turbo & GT2 / 997-2 GT2 RS - 99610391574, 99610391673, 99610391579, 99610391580, 99610391678, 99610392570, 99610392571, 99917801600, 99710391571, 99710391671, 99710392570, 99710307170 - CAR103TT3800C
1
Forged Piston & Liner Set for 3.8L Conversion for Porsche 996 Turbo & GT2 / 997-1 Turbo & GT2 / 997-2 GT2 RS
CAR103TT3800C
Product Information
Product Information
Unlock your Porsche engine's full potential with Cargraphic's 3.8L conversion kit, featuring forged pistons and steel liners.

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT2 2001-05

Porsche 997-1 Turbo 2007-09
Porsche 997-1 GT2 2008-09

Porsche 997-2 GT2 RS 2011

NOTE: These steel liners are a direct fit, requiring no modifications to the engine block. 

Contents:
6x Forged Pistons (3xLH, 3xRH), 23mm pin, 9.4:1 compression ratio, 427g
6x Steel Liners Ø102mm bore, Ø107mm spigot (direct fit, 3746ccm)
6x Piston Ring Sets 
6x Piston Pins (23mm) 
12x Circlips for Piston Pins 

Why choose this kit? 

Nikasil-Coated Forged Alloy Barrels with Steel Liners:
Provides optimal slide characteristics and enhanced durability.

Optimized Forged Piston:
Manufactured using a specialised forging process for superior performance.

Desaxes Pin Offset for LH/RH Fitment:
The desaxing shifts the contact point before TDC, reducing piston wear and engine noise.

FEM-Optimised Centre of Gravity & Weight:
Finite Element Method calculations are used to optimise balance and weight distribution.

Special Bridged Design for Enhanced Stability & Longevity:
Offers superior structural integrity for lasting performance.

Precision Milled & Treated for Weight Reduction:
Advanced milling techniques reduce weight without compromising strength.

Deeper Valve Pockets (Inlet: Large, Outlet: Small):
Engineered for compatibility with high-lift camshafts to maximize performance.

Advanced Piston Rings:
Designed to minimise oil consumption and blow-by for efficient operation.

Compatible with VarioCam Plus:
Ensures seamless integration with VarioCam Plus for optimized engine control.

High-Performance Power Upgrade:
Delivers maximum power, torque, and agility for superior driving dynamics.

Thoroughly Tested on RS-Tuning Dyno:
Developed and rigorously tested to ensure optimal performance and reliability.



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

CAR103TT3800C
99610391574
99610391673
99610391579
99610391580
99610391678
99610392570
99610392571
99917801600
99710391571
99710391671
99710392570
99710307170

The product you are viewing cross references to these numbers
Forged Piston & Liner Set for 3.9L Conversion for Porsche 996 Turbo & GT2 / 997-1 Turbo & GT2 / 997-2 GT2 RS - 99610391574, 99610391673, 99610391579, 99610391580, 99610391678, 99610392570, 99610392571, 99917801600, 99710391571, 99710391671, 99710392570, 99710307170 - CAR103TT3900C
1
Forged Piston & Liner Set for 3.9L Conversion for Porsche 996 Turbo & GT2 / 997-1 Turbo & GT2 / 997-2 GT2 RS
CAR103TT3900C
Product Information
Product Information
Unlock your Porsche engine's full potential with Cargraphic's 3.9L conversion kit, featuring forged pistons and steel liners.

Fits:
Porsche 996 Turbo 2001-05
Porsche 996 GT2 2001-05

Porsche 997-1 Turbo 2007-09
Porsche 997-1 GT2 2008-09

Porsche 997-2 GT2 RS 2011

NOTE: These steel liners are a direct fit, requiring no modifications to the engine block. 

Contents:
6x Forged Pistons (3xLH, 3xRH), 23mm pin, 9.4:1 compression ratio, 446g
6x Steel Liners Ø104mm bore, Ø107mm spigot (direct fit, 3894ccm)
6x Piston Ring Sets 
6x Piston Pins (23mm) 
12x Circlips for Piston Pins 

Why choose this kit? 

Nikasil-Coated Forged Alloy Barrels with Steel Liners:
Provides optimal slide characteristics and enhanced durability.

Optimized Forged Piston:
Manufactured using a specialised forging process for superior performance.

Desaxes Pin Offset for LH/RH Fitment:
The desaxing shifts the contact point before TDC, reducing piston wear and engine noise.

FEM-Optimised Centre of Gravity & Weight:
Finite Element Method calculations are used to optimise balance and weight distribution.

Special Bridged Design for Enhanced Stability & Longevity:
Offers superior structural integrity for lasting performance.

Precision Milled & Treated for Weight Reduction:
Advanced milling techniques reduce weight without compromising strength.

Deeper Valve Pockets (Inlet: Large, Outlet: Small):
Engineered for compatibility with high-lift camshafts to maximize performance.

Advanced Piston Rings:
Designed to minimise oil consumption and blow-by for efficient operation.

Compatible with VarioCam Plus:
Ensures seamless integration with VarioCam Plus for optimized engine control.

High-Performance Power Upgrade:
Delivers maximum power, torque, and agility for superior driving dynamics.

Thoroughly Tested on RS-Tuning Dyno:
Developed and rigorously tested to ensure optimal performance and reliability.



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

CAR103TT3900C
99610391574
99610391673
99610391579
99610391580
99610391678
99610392570
99610392571
99917801600
99710391571
99710391671
99710392570
99710307170

The product you are viewing cross references to these numbers
Ring set for Capricorn aluminium piston set P1513 - P1513 - PRS105
3
Ring set for Capricorn aluminium piston set P1513
Black Friday Sale
PRS105
Product Information
Product Information
Ring set for Capricorn aluminium piston P1513
SET OF 6

Size : 105,4 mm
Ring Thickness :
- Top Ring : 1,09 mm
- 2nd : 1 mm
- Oil-Ring : 2 mm

In motorsport, small things often decide about victory or defeat.
In particular, piston rings are among the engine components whose importance is frequently underestimated. In many cases, piston rings of poor quality are responsible for engine damage and / or poor performance.

Capricorn ensures that all parameters are optimally coordinated with each other. The manufacture is exclusively carried out by the most prestigious suppliers with whom they have been successfully cooperating for years and who all have many years of experience in motorsports.

The successful use of Capricorn piston rings in a various racing series and thus changing requirements profiles is an expression of extensive expertise and high product quality.

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

PRS105
P1513

The product you are viewing cross references to these numbers
Wet type liner for repairing top of the block. Porsche 996 3.4L / 3.6L - L3763
1
Wet type liner for repairing top of the block. Porsche 996 3.4L / 3.6L
Black Friday Sale
L3763
Product Information
Product Information
3.4 / 3.6, 96.00mm Bore, Wet Type liner for repairing top of the block (No cutouts).

  • Finish Bore Size:  96.00mm Less 0.50
  • Outside Diameter:  101.20mm
  • Overall Length:  127.75mm
  • Flange Diameter:  110.50mm
  • Flange Depth:  45.21mm

westwood

Fits:
Porsche 996 3.4L Price is Each
Porsche 996 3.6L Price is Each
Porsche 997 3.6L Price is Each
Porsche Cayman 3.4L Price is Each
Porsche Boxster 3.4L Price is Each

NEW Cast Iron cylinder liner suitable for repairing damaged Alusil bores in 996 / Cayman 3.4 / 3.6 engines, especially with "D" Chunk Damage

The liners will need to be fitted by a professional machine shop. You will not need to get special pistons or rings, as the original spec ones can be used with these cast iron liners.
Wet type liner replacement in ductile iron. Porsche 996 GT2 100mm - L4979, L6401
1
Wet type liner replacement in ductile iron. Porsche 996 GT2 100mm
L6401
Product Information
Product Information
The L 4979 liner is a direct replacement for the 100.00mm bore 996 GT2 liner, 100mm Bore, Wet
Material: Ductile iron

westwood

Fits:
Porsche 996 3.6L GT2 Price is Each

The liners will need to be fitted by a professional machine shop.
DISPLAYING 1 to 7 (of 7 products)
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About Cylinder Liner

Cylinder Liners – Precision Sleeves for Restoring Compression, Efficiency & Engine Durability

Cylinder liners (engine sleeves) are critical components in both classic and modern Porsche engines. They provide the hard, wear-resistant surface that the piston rings ride against, ensuring correct compression, minimal friction and long-term reliability. During an engine rebuild, replacing worn, cracked or heat-damaged liners is essential to restore engine performance, fuel efficiency and oil control.

Whether rebuilding an air-cooled flat-six, refreshing a high-mileage water-cooled engine, or carrying out a performance upgrade, high-quality cylinder liners ensure your engine maintains its structural integrity and optimal combustion characteristics.

What Cylinder Liners Do

Cylinder liners serve several vital functions within the engine:

  • Form the wear-resistant cylinder wall the piston and rings travel against
  • Provide a perfectly machined surface for ideal compression sealing
  • Maintain proper oil film control for smooth piston movement
  • Dissipate heat efficiently from combustion to the engine block
  • Extend service life of the engine block by offering a replaceable wear surface
  • Improve reliability under high temperatures and high loads
  • Support performance upgrades, including forged pistons and increased bore sizes

A properly installed liner helps preserve engine performance, smoothness and longevity.

Why Cylinder Liners Fail

Cylinder liners endure intense stress from heat, combustion pressure, piston friction and potential contamination. Common reasons for liner failure include:

  • Scoring and scratching from worn rings or foreign debris
  • Thermal distortion due to overheating
  • Cracks from excessive cylinder pressure or detonation
  • Nikasil or coating breakdown, causing poor sealing
  • Corrosion, especially in water-cooled engines where coolant quality has declined
  • Poor lubrication, leading to accelerated wear
  • High-mileage fatigue, eventually reducing the liner’s structural stability

Symptoms typically include: low compression, increased oil consumption, misfires, blow-by, overheating, or visible engine smoke.

Why You Should Replace Worn Cylinder Liners

Upgrading or replacing cylinder liners with precision-engineered components designed to exceed original durability and performance ensures a reliable and long-lasting rebuild.

Benefits include:

  • Restored compression and engine efficiency
  • Stronger, smoother cylinder walls for better ring sealing
  • Reduced oil consumption and cleaner combustion
  • Improved heat transfer for better temperature stability
  • Increased reliability for high-performance and track applications
  • Compatibility with performance piston kits and oversize bores
  • Protection against long-term wear and future engine damage

A new cylinder liner is one of the most crucial steps in any high-quality rebuild or performance enhancement.

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