2nd hand dynalites
 

Whats up gang. I picked up a set of front and rear dynalites with 11.75 front rotors and 11" rear from a buddy that have been sitting for some time. I'm gonna rebuild them and slap them on but he didn't have the center ring for the front rotors. Can anyone confirm that this is the correct ring.
https://www.summitracing.com/parts/wil-300-11653
Or do I even need them? The rotor hat is pt# 170-6288
https://cimg0.ibsrv.net/gimg/www.mia...2ce8852e19.jpg