Dansk Classic intermediate shaft sprocket for Porsche 997 turbo and GT2 from 2005 to 2011 : - 997 3.6 Turbo - 480 hp (M97.70) from 2007 to 2009- 997 3.8 Turbo - 500 hp (A170) from 2010 to 2011- 997 3.6 GT2 - 530 hp (M97.70S) from 2008 to 2009- 997 3.6 GT2 RS - 620 hp (M97.70) from 2011 2 sprockets are required per vehicle.