Torque up kit
 

Hi.. I'm looking to upgrade my TM Mp5 sd5.. As I can see on ehobbyasia.. there's a product called Guarder SP150 Infinite Torque-Up Kit for Marui MP5 Series for a fair price. I'm just wondering if I need to change something else with this kit. example : motors, etc.

Thanks alot and sorry if theres a thread similar, I have search but found anything.

A+





my english sucks.