O.S. Max 91 VRDF Ducted Fan Rc motor NIB. Condition is "New". Shipped with USPS Priority Mail. these are very strong engines with high rpms comes with needle valve assy and exhaust manifold.i do not have the owners manual but there easy to print up online.the box has alittle hanger rash but the engine is new and ready to roar so good luck and thanks for looking.