I was reading about roller rockers and I'm doing the 107" kit from FM with the 999-6A cams and they have .575 lift. Do I need or is it recommended to put roller rockers arms? I saw this one on eBay
http://www.ebay.com/itm/ROLLER-ROCKE...-/351243906949
Do they work? Or what else is out there recommended. I have a 2015 RGS.

Thanks

Denny