Not just the coil. The base that the coil screws into. I have seen a few folks saying they wished the bottom base of the EVOD had knurles like the T3S/MT3S. They screw right in and look really nice. I have one of each, EVOD, T3S, MT3S, and a PROTANK. My experience is that the only coil that is possible on all of them is the T3S/MT3S coil. The EVOD and PROTANK coil have larger diameter disk above the threads that screw into the base, which the T3S/MT3S will not let pass into the tank. On my protank, I have swapped the EVOD center pin onto a T3S coil to restrict air flow. I have a few center pins I kept to throw in the rotation. I am not rebuilding the coils at this point, but have allot of spare pieces. Lol.