Originally Posted by Jo90uk

Matt, I have used Xray ones, you need to remove 1mm from the ackerman spacers on the steering bell to get the arms as they where with the standard HB ones. also know a few who use the 3Racing Zero ones as they are cheaper and actually come in pairs

theres a question, why the hell does HPI/HB sell the set as a knucle and a rear hub, rather than pairs of them, its a pain in the