Is this the one your talking about?The one he has is 4 1/2 inches and the one we have is 5 inches long because its the Violator.If its not anywhere close to 4 inches its not going to fit.If its not the right sizt the pin wont fit into the hub because the shafts holes arent alined with the hole on the hub
http://www.rcplanet.com/Ofna_Front_O...p/ofn40657.htm