Yeh I got a few items in a hurry, all from Sponsor Packs.
I have a Rare glove that's cool in that it bumps three things (XP, Iron Spin, Driver Distance, I think... something like that) instead of two.
I also have Epic pants which seem to have a high boost given their relatively low level. I wear them because they are absolutely hideous (neon green and lots of other colours), and seemingly quite unique. Haven't seen anyone else wearing 'em yet.
I got two other Rare things - Shoes and a Shirt, but aside from relatively high boost from low levels, they don't seem to be anything special.
Not sure how to get them upgraded... I guess Gold+ Packs?