Engine piston. Porsche 997.2 3.8L / 991.1 3.8L / 981 Boxster Spyder / 981C Cayman GT4 - MAHLE MA1.01 / MA1.03  ❭  9A110393800

Engine piston.
Price is for EACH (must be purchased as a set of 6).

Fits:
Porsche 997.2 Carrera 4 / 4S / 4GTS 3.8L 2009 - 2012
* engine code: A101

Porsche 991.1 Carrera 4 / 4S / 4GTS 3.8L 2012 - 2016
 * engine code: A103
 * cars without Compression variant   (PR:-145) 

Porsche 981 Boxster Spyder 3.8L 2016
Porsche 981C Cayman GT4 3.8L 2016

Diagram ref no 1

Engine code: MA1.01 /  MA1.03
Cyl. Bore: 102 mm
Length: 56.4 mm
Compression: Height 32.95 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm


This piston is a core internal engine component that reciprocates in the cylinder bore, converting combustion pressure into mechanical motion via the connecting rod and crankshaft. It also works with piston rings to seal the combustion chamber, manage oil control, and withstand high heat/pressure - helping maintain factory-level performance, durability, and engine dynamics.

Functions & Technical Role:
•  Combustion pressure handling: Converts the force of combustion into linear piston movement
•  Sealing the chamber: Works with piston rings to maintain compression and prevent blow-by
•  Oil control: Cooperates with rings and skirt design to manage oil lubrication

Fitment / Position on Car
•  Installed on: Inside the engine block’s cylinder bores
•  Location: One per cylinder; typically 6 pistons required for a complete 3.8 L flat-six engine
•  Orientation: Works with piston rings, wrist pin, and connecting rod to form the bottom of the combustion chamber

Manufactured using advanced alloy technology and strict quality control standards, MAHLE pistons are engineered to withstand extreme thermal loads and high engine speeds typical of Porsche applications. The piston works in conjunction with piston rings and the connecting rod assembly to convert combustion energy into smooth, reliable crankshaft rotation.

Ideal for engine rebuilds, overhauls, or performance restorations where maintaining factory specifications is essential.

Please note: Pistons are sold individually. Six required per engine.

Related reference numbers
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9A110393800

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