O.S. Engines MAX-B21 1:8 Offroad Combo w/ Pipe & Manifold hat From an aggressive to mild

From an aggressive to mild throttle can be set

​ Soft Starting Speed & Torque

*Containing all the dirt and grime inside

preventing the body from fluttering or twisting during bumps

O.S. Engines MAX-B21 1:8 Offroad Combo w/ Pipe & Manifold hat From an aggressive to mildO. S. Engines would like to introduce new MAX B21. For 1 8 nitro Offroad TB02 EFRA2089(T 2090)MB01 75*Combo set is only for offroad application. MAX B21 is easy to use from entry level users to sports users and has excellent cost performance. Based on the O. S. SPEED series engine, it has a well balanced combination of smooth speed and power delivery can be used in both on and off road racing situations. The outer head is based on MAX 21XR B VER. 3,