The 34th new Thunderjet 500 release from Round 2 (AutoWorld) is a remarkable retro look into the original Aurora cars of the same type. There are six (6) cars in two (2) different colors in the lineup which should satisfy almost every collector. A great addition at an inexpensive price. Auto World's newly improved ThunderJet Ultra/G cars feature a special neodymium traction magnet on the underside of the chassis. This additional component smoothes handling, and allows for faster speeds in the corners.