I owned 2 extech .24's and absolutely loved them. I was running them in my HB D8T with losi clutch, 13t clutch bell, with DP 053 MR pipe, and I was getting just over ten minutes run time on my full mod and about 9 min on my race prep. The bottom end was awesome and I could keep up no problem on our super long straightaway at revalation raceway. I would have kept them if there was parts support.