Models View all Monster Racer 7 50 2 ACS 12x12 CI Series Rotary Airlock 43 1563 6 Semi Tractor 67 2311 19 HHM1 Hit & Miss Engine 19 368 3 Car Trailer (Tilt Deck) 131 3996 14 Spark Arrestor 16 536 1 Education BSMET - Purdue University 2011