Originally Posted by
rcgod
Yes xray sells ball diffs for the xb4. I've been running them in mine since I built it. I tried the gear diffs for 1 race day and went back to ball for med bite. We're going outdoors next week for high bite sugar and I'll probably switch to gear diffs.
I've been wanting to try the ball diffs but $140 is a big price tag when I don't know if ill like them