This week on The Best of Car Talk, Ted put his carpentry skills to work by redirecting his van’s leaky exhaust through a series of pipes outside the van. His pipe-shrouded van might scare off clients, and he may have greatly increased the chances of setting the van on fire, but is Ted still worthy of a Click and Clack Genius award? Elsewhere, Jeff is concerned that his Eagle Scout son doesn’t want to drive, but he may want to give the kid another merit badge, for good sense; Peter has gotten half a dozen bad diagnoses for his truck’s shifting problem—including floor mats—and may be about to get one more; and are Tom and Ray leading practitioners of “Learned Ignorance”? All this and more, this week on The Best of Car Talk.