Flywheel help

I'm trying to take my flywheel off my engine,there are some bolts that look like torx head.I tried a T#55 but its a little too small,is there a special tool for this type of bolt? P.S.Its a 2.5 6speed

Thanks Fred

.boy, that's a tough one. there's of course many torx heads.

search on this site for FSM (field service manual) it may say in there what size and or the proceedure.