Contains 2 detailed, accurate exhaust and afterburner assemblies for the Tumansky R-15 engines fitted to interceptor versions of the Foxbat. The kit exhausts are the wrong type for the Interceptor variants. There is a bit of work necessary to install them, but its all described in detail in the instructions, and is a huge detail upgrade for the Kitty Hawk kit. (designed to be used with Kitty Hawk Model kits)