SportRack (brand) Horizon L (model) rooftop cargo box. Link below is for newest version of this box. Cost new is $500. The dimensions are the same but my rack has slightly different hardware for connecting to the roof. Works fine. Never had an issue. This thing has been on multiple long road trips and can handle 80mph easily, empty or full. Surprisingly it doesn't have much impact on MPG.
Notes:
- Only comes with 1 key. Spare keys available on manufacturer website or just replace the lock core which is easy to do.
- I drilled a few tiny holes in the bottom to drain melted snow so it doesn't collect water in it. Due to the location of the holes it does NOT get water inside the box even when driving in the rain. These can easily be plugged to make water tight but if using for sports equipment I'd suggest leaving them open.
Manufacturer link with product description:
https://www.sportrack.com/product/horizon-l-cargo-box/