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Original Porsche Part Genuine Porsche part 98710307101
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
6 sets per engine. Price is for 1 set.
Fits:
Porsche Boxster 3.4L
Porsche Cayman 3.4L
M97.21 & M97.22 Engines
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98710305302
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
6 sets per engine. Price is for 1 set.
Fits:
Porsche Boxster 3.4L
Porsche Cayman 3.4L
M97.21 & M97.22 Engines
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98710305302
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Fits:
Porsche Cayman 3.4L
Porsche Boxster 3.4L
Bore: 96.00mm
Stroke: 78mm
Rod: 144.98mm
Comp Height: 32.35mm
Pin Diam: 22mm
Weight Group: 395
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
197848980
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
6 sets per engine. Price is for 1 set.
Fits:
Porsche Boxster 3.4L
Porsche Cayman 3.4L
M97.21 & M97.22 Engines
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98710305302
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman S / R 3.4L 987C MKII 2009-12

Fits:
Porsche 986 Boxster 2.7ltr - 2003 to 2004
Porsche 987 Boxster 2.7ltr - 2005 to 2008
Porsche 987 Cayman 2.7ltr - 2006 to 2008
Please note, pistons not suitable for Alusil coated bores
Suitable to use with Nikasil liners.
Technical information is sourced from Wossner's latest catalogue:
Part Number: K9569DA
Oversize: 0.0mm (Standard)
Engine Type: M96.20 / M96.25 / M97.20
Piston Size: 85.42mm
OE Bore Size: 85.5mm
Stroke: 78mm
Wössner Comp Ratio: 11.0:1
Compression Height: 32.3mm
Ring Part Number: 855XPY
Number of Cylinders: 6
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.
K9569DA
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Cayman 2.7L 987C 2006-08
Identification:
+
524 - 530 G
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98710305113
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
6 sets per engine. Price is for 1 set.

Fits:
Porsche 987.1 Boxster S 3.4ltr - 2009 to 2012
Porsche 987.1 Boxster RS Spyder 3.4ltr - 2009 to 2012
Porsche 987.1 Cayman S 3.4ltr - 2009 to 2013
Porsche 987.1 Cayman R 3.4ltr - 2009 to 2013
Engine types - M96.21 / M97.22
Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
98710305302
The product you are viewing cross references to these numbers
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
This MAHLE engine piston is a high-quality aftermarket replacement engineered to meet the specifications of the Porsche OE piston 98710305113 for Porsche Boxster and Cayman 987 models. This precision-manufactured piston is designed to restore engine performance, compression, and reliability during rebuilds or maintenance.
Price is for EACH (must be purchased as a set of 6)
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.005 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
As a core component of the internal combustion engine, the piston reciprocates within the cylinder bore, compressing the air-fuel mixture before ignition and transmitting combustion forces through the connecting rod to the crankshaft. It works together with piston rings to maintain proper sealing, manage oil control, and withstand high temperatures and pressures associated with engine operation.
Applications:
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Performance & Fit:
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances. It’s ideal for engine rebuilds, restorations, or replacing worn pistons to help maintain the original driving dynamics and engine efficiency that Porsche owners expect.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
Restore the heart of your Porsche with this set of six MAHLE engine pistons, precisely engineered to the specifications of original Porsche pistons. Designed specifically for the Porsche 987 Boxster and Cayman 3.4 L engines, this complete piston set includes all six pistons needed for a complete engine rebuild or overhaul.
SET OF 6
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.005 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
ach piston in the set is manufactured with high-strength aluminium alloy and precision machining to ensure optimal combustion sealing, durability under thermal stress, and reduced friction. Combined with piston rings and proper installation, this set helps maintain compression performance, engine efficiency, and long-term reliability - key to preserving the iconic performance and driving experience of the 987 platform.
Ideal for engine rebuilds, overhauls, or when replacing worn or damaged pistons, this full set ensures correct balance and uniform wear characteristics across all cylinders.
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
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