If you mean like upgrades then maybe new cranks, bb, front disc instead of maggie maybe a better freewheel, tires ect. you can upgrade almost everything on them, is it still the steel forks on the 06? if it is i would change them, i did and it made a massive difference to my bike, its really nice on the back wheel now. Try using the search as well there has been a few topics about upgrading t-birds and t-pros.