Missed the Vol. 6 Speed Pass? The Vol. 6 Dynamic Catch-Up Pack grants instant access to the first 45 tiers of content (including the Audi R8 Coupé '19 and S5 Sportback '17). For Vol. 6 Premium Speed Pass owners, it also grants access to the additional 30 tiers of premium content.

https://store.steampowered.com/app/2856160/Need_for_Speed_Unbound__Vol6_Dynamic_CatchUp_Pack/

Additionally, you can get instant access to the car from the Vol. 6 Premium Speed Pass with the Audi RS 6 Avant ‘20 Set, complete with all three bodykits.

https://store.steampowered.com/app/2926920/Need_for_Speed_Unbound__Audi_RS_6_Avant_20_Set/

*Requires Need for Speed Unbound (sold separately) and all game updates.