i run iasca dbdrag and meca iasca is based on cone size and power wire runs dbdrag is based on battery and cone size meca is based on fuse rating and cone size. points system. iasca=stock 1 which my car was built for primarily meca is going to be street 1,2 or3 dbdrag st c or b depends on which battery i have in iasca and dbdrag measure at the dash sealed up. meca meters at the head rest with any combo doors open or closed