As of now, you can get your hands on Rocket League Momentum Series things through the Rocket League Items in-game shop.

These things won't be around never-endingly, regardless. In fact, they'll fundamentally be open for 48 hours. As of 1:00 p.m. PDT on June 25, the things will disappear from the shop, and no one knows when Psyonix will bring them back.

The Rocket League Momentum Series things will eat up follows correspondingly as individual things in the lolga Item Shop. The new variety recalls for abundance of twelve new things, including the Peregrine TT, the Huntress Decal for Fennec, and the Interstellar Animated Decal.