Hi I researched for engine upgrades and found O.S .18TM Traxxas manifold and O.S .18TZ I saw the prices and specs but I think TZ got more power and stuff but its cheaper than .18TM whats wrong with this thing? I mean TZ is serious competition Engine with better specs! I think I'm missing something here there must be some reason why TM is more expensive than TZ. Whats the diffrence guys? and Is TZ able to fit into Jato right out of the box or do I need to buy something inorder to make this TZ engine fit?

You need to buy more stuff to make it work.