When I reviewed Merchants of Speed, a survey of the first generation of the automotive aftermarket, I was shocked to learn just how many aftermarket eponyms were based in Los Angeles (not far from my house, actually). It truly was a golden age of guys building parts in backyard sheds for the local race that weekend. Where They Raced focuses on the tracks from that era. Despite having a reputation for discarding old for new at every opportunity, walks through older parts of Los Angeles reveal the scars of what used to be there. My old neighborhood still had some original Pacific Electric Railway tracks in the pavement. Where They Raced takes former racers and their relatives to the former sites of tracks that gave birth to hoonage. Check out the trailer after the jump.