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9871030511X/2
Product Information
Product Information
Engine piston -  Ø  96.50 - Engine type: M 97.21 / M 97.22
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:   96.505   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Related, superseded, cross reference or alternative numbers for comparison.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
98710305113
503 PI 00108 000
503 PI 00108 002

The product you are viewing cross references to these numbers