I also curious about this. My BT 5MT already removed the speed cut from the halfcut but didn't see other gadget. I think something can be done from the ECU or wiring?
HKS SLD.... goooood.....
but you won know your speed once the needle showing more than 180kmh....
SLD also will make you reach 180kmh faster (in my BT6SPD) i can reach it in my 5th gear and throttle got room summor.... not to mention i got one more gear..... kekeke.....