Very simple installation, comes with all parts needed to install, and instructions....
HT011. HennTec idler system kit for Heng Long Tiger 1 with plastic hull.
HT012. HennTec idler system for Asiatam and Taigen Tiger 1 with metal hull.
HT013 HennTec idler system for Tamiya Tiger 1.
HT014. HennTec idler system for Heng Long Panther and Jagdpanther.
HT015 Henntec idler system for Tamiya Panther/Jagdpanther.
HT0016 Idler system for Tamiya Leo 2A6.
HT017 Idler system for KT.