The Toyota Prius is, by no stretch of the imagination, a car fit for rebels, says Leno on this week's episode of CNBC's "Jay Leno's Garage." As he puts it, "I mean, it's practical. It's got four doors. It's fuel-efficient. It's quiet. You can eat kale in it. You can pick up gluten-free pasta in it. And when you put it in echo mode, it barely uses any gas at all."

But after he meets Nick Filippides, co-owner of American Racing Headers, Leno has a change of heart. Filippides has customized his own Prius, the SRT8, by taking a 2005 model and swapping in a Dodge Hellcat crate engine.