It has adjustable  snap closure in the rear so one size fits for all

Clutch Disc Diameter (mm)

PCD: 5x114

resulting in a valve that is self-balanced against any drive pressure

you can benefit from optional "C6 Rack Offset Spacer Kit" that will allow you to achieve even bigger steering angle on C6 chassis (not needed on C5) and improves the Ackermann curve

Concaver CVR5 21x9,5 ET14-61 BLANK Brushed Titanium CB: 74,1 Anti-theft Bolts It has adjustable snap closurePCD: 5x108, 5x110, 5x112, 5x114. 3, 5x115, 5x118, 5x120, 5x127, 5x130 ET: 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61