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Piston Rings

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DISPLAYING 1 to 5 (of 5 products)
94410397300/1::1
Product Information
Product Information
Piston ring set. Price is for 1 set.

goetze

Cylinder Bore: 100,00 mm
Component Number:
• R1,5 IF Cr P
• M1,75 IW Cr P
• DSF 3,0 Cr
Standard Size [STD]

Fits:
Porsche 924 S 1986-88
Porsche 944 2.5L 1985-87
Porsche 944 S 1986-88

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Related, superseded, cross reference or alternative numbers for comparison.

94410397300
94410397300
08-320400-10
94410390100

The product you are viewing cross references to these numbers
94410397300/1
Product Information
Product Information
Piston ring set. Price is for 1 set.

goetze

Cylinder Bore: 100,00 mm
Component Number:
• 1.5mm 005 P IKA
• 1.75mm 026 P IKA
• 3.0mm 712 CR ST
Standard Size [STD]

Fits:
Porsche 924 S 1986-88
Porsche 944 2.5L 1985-87
Porsche 944 S 1986-88

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Related, superseded, cross reference or alternative numbers for comparison.

94410397300
94410397300
08-320400-10
94410390100

The product you are viewing cross references to these numbers
94410390260/1
Product Information
Product Information
Piston Ring Set. 4 sets per engine. Price is for 1 set.

mahle

Fits:
Porsche 944 2.7L 08.1988 - 07/1989 M44.11 M44.12
Porsche 944 S2 08.1988 - 07.1991 3.0L M44.41
Porsche 968 1992-95 3.0L

Sizes:
104x1.75mm / 104x2mm / 104x3mm Standard


Click picture for large parts diagram.
Diagram Ref No 3.

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Related, superseded, cross reference or alternative numbers for comparison.

94410390260
50397N0
94410390260
94410390224

The product you are viewing cross references to these numbers
Special Order item
95110390102
Product Information
Product Information
Piston Ring Set. 4 sets per engine. Price is for 1 set.

porsche

Fits:
Porsche 944 Turbo 1985-91

Click 'Zoom in' for large parts diagram.
Diagram Ref No 3.

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Related, superseded, cross reference or alternative numbers for comparison.

95110390102
503 90 N0
50390N0
503 86 N0
50386N0
95110390102

The product you are viewing cross references to these numbers
95110390102/2
Product Information
Product Information
Piston Ring Set. 4 sets per engine. Price is for 1 set.

goetze
Goetze ref no. 08-323300-00

Fits:
Porsche 944 Turbo 1985-91

Click 'Zoom in' for large parts diagram.
Diagram Ref No 3.

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Related, superseded, cross reference or alternative numbers for comparison.

95110390102
503 90 N0
50390N0
503 86 N0
50386N0
94410390209
94410390282
95110390102
94410390283
92810390607

The product you are viewing cross references to these numbers
DISPLAYING 1 to 5 (of 5 products)
About Piston Rings

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.

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