Team Racing & showdown in multiplayer

A Team of  2 vs 2 vs 2 vs 2 or 4 vs 4. 

The team that comes in first get Double Exp / Credit & Rank.

At least 1 person in the team must win.

And Showdown as another game mode option.

No Showdown in multiplayer please

why? So far I can't enter the showdown because I can't afford or don't have the car for the multiplayer showdown in events.
I'm basically Locked Out of that game.