3087247|Piston Ring Set for 2011 BMW 550i GT xDrive 4.4L - PR881XP3. This Piston Ring Set fits the 2011 BMW 550i GT xDrive equipped with the 4.4L engine. It delivers exceptional reliability and is essential for restoring factory engine performance.. 2011 BMW 550i GT xDrive 4.4L Engine Piston Ring Set - PR881XP3 Also fits the following vehicles: 2010 BMW 550i GT xDrive 4.4L Engine Piston Ring Set, 2011 BMW 550i GT xDrive 4.4L Engine Piston Ring Set, 2012 BMW 550i GT xDrive 4.4L Engine Piston Ring Set, 2010 BMW 550i GT 4.4L Engine Piston Ring Set, 2011 BMW 550i GT 4.4L Engine Piston Ring Set, 2012 BMW 550i GT 4.4L Engine Piston Ring Set, 2011 BMW 550i xDrive 4.4L Engine Piston Ring Set, 2012 BMW 550i xDrive 4.4L Engine Piston Ring Set, 2013 BMW 550i xDrive 4.4L Engine Piston Ring Set, 2011 BMW 550i 4.4L Engine Piston Ring Set, 2012 BMW 550i 4.4L Engine Piston Ring Set, 2013 BMW 550i 4.4L Engine Piston Ring Set, 2010 BMW 750i xDrive 4.4L Engine Piston Ring Set, 2011 BMW 750i xDrive 4.4L Engine Piston Ring Set, 2012 BMW 750i xDrive 4.4L Engine Piston Ring Set