OS Engines
Inner Head: O.S. MAX-B21
55HZ-H Hyper Ringed .55 Helicopter Engine
Outer Head: O.S. Max .12 TG Version 4
Crankcase: O.S. Max .12 TG Version 4
O.S. Speed T1204 Touring Engine
O.S. Speed B21 Adam Drake Edition 3, 1/8 Buggy Engine & Pipe Combo Set
