Yeah Racing TT01 "Rapid" conversion kit upgrade will significantly improve the handling of your stock Tamiya TT-01! Compared to the out of the box chassis, it improves TT01 stability, allowing it to run smoother on different surfaces. Aluminum Main Drive Shaft replaces the standard molded plastic drive shaft for handling the extra power of modern day brushless systems; it also offers more direct acceleration. The aluminum upper arm set is equipped with adjustable camber which enhances the response of Tamiya TT01 and allows for sharp turns. DSG dampers are also included to further enchance handling, comes with different springs and pistons for you to fine tune the response. All in all, Yeah Racing TT01 conversion kit (upgrade version) includes everything you need to upgrade from the original TT01 to a competitive racing RC chassis.