Werks racing small block .21
2.2 hp, 32,000 rpm
mate this engine with a Sirio big bore pipe and a motorsaver air cleaner and you will have a BEAST of a T-Maxx.
The tranny will hold up just fine. If anything you will might break the top shaft(4992) or the primary gear (4995) but I doubt it. It's definitely worth the money to upgrade to the Robinson double disc slipper kit. This will take most of the load off of your tranny.