Am having this dilemma at the min also if to go tdo4 or not I guess it depends what you're doing with the car I dont track my starlet so more then often smoke chavs in saxos lol so a tdo4 would be too laggy for me however my ct9 doesn't pull to redline I be interested to know anyone who runs a ct9 hybrid or ct12 or ct20 and see how they spool and drive but I would also add the wepr billet td04 kit looks amazing