Weight Groups And Identification Markings

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Information

Original pistons from the Porsche Spare Parts Catalogue are only available in the dimensional group X.
Observe the different weight groups.

Identification markings:

Manufacturer's logo
Date of production
Manufacturer's drawing number
Weight group
Arrow marking for intake side (visible on new pistons)
Data matrix code
Porsche part number
Dimensional group

Fig 1: Identifying Piston Markings
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

PISTON SPECIFICATION (WEIGHT GROUPS)

Weight group	Piston, complete, 997 Turbo/Turbo S 3.8 l - Ø 102 mm MA170/170 S	Piston, complete, 997 3.8 l - Ø 102 mm MA101	Piston, complete, 997 3.6 l - Ø 97 mm MA102
-	629 - 635 g	565 - 571 g	497 - 503 g
+	635 - 641 g	571 - 577 g	503 - 509 g