Yeah mines 4.11 just comes as a center. Got mine for about $900 bucks delivered . Makes a big difference to under steer mid corner and big difference under power on exit .
More traction feels more predictable . Does make the open center front alot more noticeable tho. Oh mines a daily and not really noticeable. I found it cheaper and easier to buy a center then to chase up a madd factory r160. Got my center from Possum Bourne Motorsport second hand . You will pay about 1100 to 1200 for a brand new Cusco 1.5.