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Wössner Pistons

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DISPLAYING 1 to 3 (of 3 products)
Black Friday Sale
K9468
Product Information
Product Information
Wössner forged piston kit.

wossner

Fits:
Porsche 997.1 (911) 3.6 C2 & C4

Please note, pistons not suitable for Alusil or Lokasil coated bores
Suitable to use with Nikasil liners.

Specification
Technical information is sourced from Wössner's latest catalogue:

Part Number: K9468
Engine Type: M96.05
OE Bore Size: 96.00mm

Bore Sizes Available:
- 96.00mm - 3824.21, Compression Ratio: 11.3:1
- 96.50mm - 3862.93, Compression Ratio: 11.4:1

Bore Size 96.00mm
Piston Size:
Over Size: 0mm
Displacement CC:
Dome / Bowl Volume:
Wössner Comp Ratio: 11.3:1
Ring Part Number: 960XSY-3
Please note, pistons not suitable for Alusil or Lokasil coated bores

Bore Size 96.50mm
Piston Size:
Over Size: 0.5mm
Displacement CC:
Dome / Bowl Volume:
Wössner Comp Ratio: 11.4:1
Ring Part Number: 965XSY-3
Please note, pistons not suitable for Alusil or Lokasil coated bores

Please CLICK HERE for Technical release – Piston / Con rod
orientation.


Wössner are regarded by Europe's leading motor sport engine builders as being the piston of choice when building an engine not only to perform, but to withstand the stresses and duress's of competition life. Wössner pistons feature a unique PTFE coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances. The crowns of the pistons are also polished to better resist detonation on a high performance engine. Polishing allows a more even spread of heat inside the chamber which will help prevent "hot spots" on piston crowns. Price includes all piston rings and gudgeon pins.

Price shown is for complete engine set.
Black Friday Sale
K9474
Product Information
Product Information
Wössner forged piston kit.

wossner

Fits:
Porsche 997 (911) Carrera S & 4S 3.8L 24v

Please note, pistons not suitable for Alusil or Lokasil coated bores
Suitable to use with Nikasil liners.

Specification
Technical information is sourced from Wössner's latest catalogue:

Part Number: K9474
Engine Type: M97.01
OE Bore Size: 99.00mm

Bore Sizes Available:
- 99.00mm - 3824.21, Compression Ratio: 11.8:1
- 99.50mm - 3862.93, Compression Ratio: 11.9:1
- 100.00mm - 3901.85, Compression Ratio: 12.0:1

Bore Size 99.00mm
Piston Size: 98.93mm
Over Size: 0mm
Displacement CC: 3824cc
Dome / Bowl Volume: 13.8cc
Wössner Comp Ratio: 11.8:1
Ring Part Number: 960XPY
Please note, pistons not suitable for Alusil or Lokasil coated bores

Bore Size 99.50mm
Piston Size: 99.43mm
Over Size: 0.5mm
Displacement CC: 3862cc
Dome / Bowl Volume: 13.8cc
Wössner Comp Ratio: 11.9:1
Ring Part Number: 965XPY
Please note, pistons not suitable for Alusil or Lokasil coated bores

Bore Size 100.00mm
Piston Size: 99.93mm
Over Size: 1mm
Displacement CC: 3901cc
Dome / Bowl Volume: 13.8cc
Wössner Comp Ratio: 12.0:1
Ring Part Number: 970XPY
Please note, pistons not suitable for Alusil or Lokasil coated bores

Standard
Stroke: 82.8mm
Dome/Bowl Volume: -13.8cc
OE Comp. Ratio: 11.8:1
Comp. Height : 33mm
Valves Per Cylinder: 4
Cylinders: 6

Please CLICK HERE for Technical release – Piston / Con rod
orientation.


Wössner are regarded by Europe's leading motor sport engine builders as being the piston of choice when building an engine not only to perform, but to withstand the stresses and duress's of competition life. Wössner pistons feature a unique PTFE coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances. The crowns of the pistons are also polished to better resist detonation on a high performance engine. Polishing allows a more even spread of heat inside the chamber which will help prevent "hot spots" on piston crowns. Price includes all piston rings and gudgeon pins.

Price shown is for complete engine set.

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

K9474
99710303028
99710303030
99710303031
503PI0010000000

The product you are viewing cross references to these numbers
K9268D200
Product Information
Product Information
Wössner Forged Piston Kit for Porsche 997 GT3 RS 3.8 24v 2006- (415PS)

wossner

Suitable to use with Nikasil liners.

Specification
Technical information is sourced from Wossner's latest catalogue:

Part Number: K9268
Engine Type: -
OE Bore Size: 100.00mm

Bore Sizes Available:
- 102.00mm - 3745.71cc

Stroke: 76.4mm
Dome/Bowl Volume: +0.82cc
Wössner Comp. Ratio: 12.7:1
OE Comp. Ratio: 12.0:1
Comp. Height : 30.10mm
Valves Per Cylinder: 4
Cylinders: 6

Please CLICK HERE for Technical release – Piston / Con rod
orientation.


Wössner are regarded by Europe's leading motor sport engine builders as being the piston of choice when building an engine not only to perform, but to withstand the stresses and duress's of competition life. Wössner pistons feature a unique PTFE coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances. The crowns of the pistons are also polished to better resist detonation on a high performance engine. Polishing allows a more even spread of heat inside the chamber which will help prevent "hot spots" on piston crowns. Price includes all piston rings and gudgeon pins.

Price shown is for complete engine set.
DISPLAYING 1 to 3 (of 3 products)
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About Wössner Pistons

High-Strength Wössner Pistons for Performance, Durability & Precision Engine Rebuilds

Wössner pistons are engineered for drivers who demand exceptional strength, reduced weight and superior thermal stability from their engines. Manufactured from forged aluminium for maximum durability, Wössner pistons are designed to withstand high cylinder pressures, elevated temperatures and aggressive tuning—making them ideal for turbocharged, supercharged, high-compression and track-focused Porsche builds.

Whether rebuilding a road-going performance engine or constructing a high-output motorsport power unit, Wössner pistons offer outstanding reliability, enhanced power delivery and long-term durability.

What Wössner Pistons Do

Wössner pistons improve engine performance and reliability by:

  • Increasing strength and durability with forged alloy construction
  • Enhancing combustion efficiency through optimised crown shapes
  • Reducing reciprocating mass, improving throttle response
  • Supporting high RPM operation with stronger piston skirts
  • Maintaining consistent sealing via precision-machined ring lands
  • Managing extreme heat loads for turbocharged and high-compression engines
  • Reducing friction for smoother and more efficient operation

These pistons are specifically engineered to perform in demanding environments where standard components fall short.

Why Pistons Commonly Fail

Even high-performance engines can suffer piston failure due to extreme conditions or insufficient servicing. Common causes include:

  • Detonation or pre-ignition damaging ring lands or piston crowns
  • Thermal overload in turbocharged or high-output engines
  • Oil starvation leading to scuffing or seizure
  • Incorrect fuelling or tuning, creating lean combustion
  • High mileage wear, reducing skirt stability
  • Contamination from debris in the lubrication system
  • Excessive boost pressure, stressing cast pistons beyond their limits

Symptoms include blow-by, low compression, excessive oil consumption, knocking noises, or visible damage during engine teardown.

Why You Should Replace Your Pistons with Wössner Components

Upgrading to precision-engineered Wössner forged pistons designed to exceed original strength and performance characteristics provides significant benefits for any engine rebuild.

Advantages include:

  • Superior durability under high boost or performance driving
  • Stronger resistance to detonation and thermal fatigue
  • Improved compression retention and sealing efficiency
  • Reduced piston mass for enhanced engine response
  • Increased lifespan for performance and track applications
  • More consistent combustion and power delivery
  • Confidence when pushing the engine to its limits

Wössner pistons are a proven choice for rebuilders seeking motorsport-grade reliability and performance.

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