Koontz gives no clarification of what Jeep model is involved in his novel Lightning, except that it is a “Jeep wagon”. His use of tailpipes (plural) hints at a V-8 engine, making us believe he was thinking of a Grand Wagoneer (other Jeep models only offered 4- or 6-cylinder engines). However, neither the Grand Wagoneer nor any models from Jeep were available with a factory dual exhaust option during the 1980s, so that imagined detail proves inconclusive.