i am pretty sure they use the same backplate, i would suggest asking the support on redcat's website before you order it though, i remember a problem with someone using a pullstart from hpi, they work on the vx .18 and not the infinity.






***** i just checked the site and they sell a different backplate for the vx.18 and the infinity .18 so i think they are different, not to mention they are out of stock on the infinty backplate*************