Piston Rings
6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 turbo - 200 to 2005
Porsche 997.1 turbo - 2007 to 2008
Porsche 997.1 GT2 - 2007 to 2008
Porsche 997.2 GT2RS - 2011 to 2012
Engine types - M96.70 / M97.70 / M97.70S
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Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99710392570
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MK1 GT2 2007-09
- Porsche 997 MKII GT2 RS 2011-13
MS 96mm 1.2 St, 1.5, 2.0mm

Fits:
Porsche 996 3.6L
Porsche 997 3.6L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1978505
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08

6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 Carrera 2 3.4L (1998 - 2001)
Porsche 996 4 3.4L (1999 - 2001)
M96.01/02/04 ø96 mm, Ring 1,20 x 1,50 x 2,00 mm
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Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305302
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 Carrera 2 3.4L (1998 - 2001)
Porsche 996 4 3.4L (1999 - 2001)
M96.01/02/04 ø96 mm, Ring 1,20 x 1,50 x 2,00 mm
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305302
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01

6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 3.6L 002>>
M96.03 Engine ø96 mm, Ring 1,20 x 1,50 x 2,00mm
997 3.6L M96.05
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Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305304
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 3.6L 002>>
M96.03 Engine ø96 mm, Ringe 1,20 x 1,50 x 2,00mm
997 3.6L M96.05
These piston rings are suitable for original Locasil bores and our own Cast Iron / Ductile cylinder liners. These are manufactured to the Original OE Specification, so will fit OE Pistons.
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305304
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
6 sets per engine. Price is for 1 set.

Fits:
standard factory Lokasil / Nikasil liners
Porsche 996 3.6L 2002>>
M96.03 Engine ø96 mm, Ring: 1,20 x 1,50 x 2,00mm
997 3.6L M96.05
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305304
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 3.6L 002>>
M96.03 Engine ø96 mm, Ring 1,20 x 1,50 x 2,00mm
997 3.6L M96.05
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305304
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 TT 3.6L
ø100 mm,
1.2mm 005 NT KV1
1.75mm 026 P F14
2.0mm 231 NT F14
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Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610392570
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05

Price Is For 1 Set.
x6 Sets Per Engine.
Fits:
Porsche 996 Turbo 3.6L 2001>>2005
ø100 mm
1.2mm 005 NT KV1
1.75mm 026 P F14
2.0mm 231 NT F14
Diagram Ref No 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610392571
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
6 sets per engine. Price is for 1 set.

These are better than the original & have been tested by many engine rebuilds.
Top Ring and Bottom rings = Stainless CAS Nitrided
Middle Ring = Cast Iron
Fits:
Porsche 996 3.4L >>2001
M96.01/02/04 ø96 mm, Ringe 1,20 x 1,50 x 2,00 mm
These piston rings are suitable for original Locasil bores and our own Cast Iron / Ductile cylinder liners. These are manufactured to the Original OE Specification, so will fit OE Pistons.
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305302
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
6 sets per engine. Price is for 1 set.

Fits:
Porsche 996 3.4L >>2001
M96.01/02/04 ø96 mm, Ringe 1,20 x 1,50 x 2,00 mm
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610305302
The product you are viewing cross references to these numbers
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
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
The product you are viewing cross references to these numbers
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 GT3 2007-09


Fits:
Porsche 996 GT3 1999 to 2001
with engine code M99.76
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610392590
The product you are viewing cross references to these numbers
- Porsche 996 GT3 MKI 1999-02
Piston Rings – Precision Engine Sealing & Performance for Porsche Models
The piston rings in your Porsche engine are critical components that maintain compression, regulate oil consumption, and ensure efficient combustion. Positioned around the pistons, they create a tight seal between the piston and cylinder wall, keeping combustion gases contained while allowing smooth piston movement.
At Design911, we supply a comprehensive range of piston rings designed for both classic and modern Porsche engines. Manufactured from high-strength, heat-resistant materials, these rings deliver exceptional sealing, reduced friction, and long-term reliability. Whether you’re performing a full engine rebuild or a top-end refresh, our quality piston rings are engineered for perfect fitment and optimum performance.
What Do Piston Rings Do?
Piston rings perform three vital functions within the
engine:
- Sealing
the combustion chamber – to prevent gas leakage and maintain
compression.
- Controlling
oil consumption – by scraping excess oil from the cylinder walls.
- Conducting heat – transferring it from the piston to the cylinder wall to prevent overheating.
These rings are essential for maintaining engine
efficiency, power output, and longevity. Properly functioning piston rings
ensure consistent compression, clean emissions, and smooth performance.
Why Do Piston Rings Fail?
Piston rings are subject to intense heat, pressure, and friction. Over time, these conditions can lead to wear, loss of sealing ability, or even engine damage.
Common Causes of Piston Ring Failure Include:
- Excessive
wear or scoring from poor lubrication or debris.
- Carbon
build-up causing sticking or uneven sealing.
- Overheating
that leads to ring warping or loss of tension.
- Corrosion
or fatigue from oil contamination.
- Improper installation during rebuilds or maintenance.
Symptoms of worn piston rings include blue exhaust smoke, loss of compression, reduced performance, or excessive oil consumption — all signs that replacement is required.
Why Replace Piston Rings?
Replacing worn or damaged piston rings restores compression, improves combustion efficiency, and protects your Porsche engine from further wear. Our high-performance piston rings are built to withstand extreme conditions, ensuring consistent sealing and reduced friction.
Key Benefits:
- Restores compression and engine power.
- Reduces oil consumption and exhaust smoke.
- Improves fuel efficiency and combustion quality.
- Constructed from durable, heat- and corrosion-resistant alloys.
- Direct-fit
compatibility for a wide range of Porsche models.
- Ideal for rebuilds, restorations, or performance upgrades.
Investing in premium-quality piston rings ensures lasting performance, smoother running, and optimal engine reliability.
Highlights:
- Precision-engineered piston rings for Porsche engines.
- Restores compression, performance, and oil control.
- Made from high-strength, wear-resistant materials.
- Perfect fit for classic and modern Porsche models.
- Essential for rebuilds and long-term engine health.
- Ensures smooth, efficient combustion and lower emissions.