3.4L 24v - M97 

This page covers the Porsche Cayman S and Boxster S 987.1 3.4L 24-valve M97 engine, identified by engine codes M97.21 (2006-2008) and M97.22 (2007-2008). A single active forged WOSSNER piston kit, ref. K9471DA, offered in three overbore sizes 96.0mm (11.1:1 ratio), 96.5mm (11.2:1 ratio) and 97.0mm (11.3:1 ratio), 22mm gudgeon pin and 32.3mm pin height. This page is single-product: it is the only reference available for this engine in our catalogue. An M97 generation distinct from the 3.4L M96 of the 911 996 and its dedicated head studs.