Inline Tube’s annual open house has become the unofficial start of the Detroit car show season, and the latest one drew the biggest crowd in its history thanks to a rare stretch of wall-to-wall sunshine. The company started in a two-car garage in 1995, grew into a 28,000-square-foot facility, and now makes preformed brake and fuel lines across more than 14,000 tube patterns. Why does a parts manufacturer out-draw judged shows? Read on for how a factory parking lot became one of Michigan’s most anticipated spring gatherings.