Tar.they arnt much heavier than a 2.0 zetec. Iv striped everything of that's not needed and weighed it.i built the roll cage myself so weighed every pice and kept it all behind the seats apart from the door bars .no overhead bars as they like to kill people in a crash if no helmet, weighed all firewall steel and rad,tank,battery. E.t.c, widened the track by 280mm, updated suspension, breaks. Duel bias, ajusting shocks,camber bolts,so pretty much done what I can to counter act understeer. when all together and running ill take it to a track for the day for the final ajustments