all you Rocket League Trading need to do from xingwang's blog

If you need the Formula 1 Fan Pack, all you Rocket League Trading  need to do is open the Item Shop in the Main Menu and navigate thru the tabs till you locate .

Bundles. You’ll locate it there as soon as it’s to be had. 

Then, add it in your cart and entire the transaction.Players can also get their palms on an extra cosmetic, the Formula 1 Player Banner, which is available to anyone without cost. It’s best up for grabs RL Trading till May 26 but will go back later within the year once the season progresses.