What dup? It depends on 1: is your civic a si & a stick? 2: Which car do you feel is the best cond ,cosmetics etc. 3: Do you plan on racing at track or daily driver around town? Are you selling one or donating to good will? Reason I ask good will or donating is because if you're going that route I would switch parts from both cars. Example: if you're into racing take out the motor,trans seats,ecu wheels etc. Even though you might have cruise control, abs, power windows etc. The civic with everything from the Teg will run circles around your GS. The choice is yours, but think about it racing or daily driver.Also if you swap parts just put a B. S. motor in Teg, B4 donating. good luck! Gingas,Ghetto Prince