Yeah but not much needs to be upgaded they are tough as nails. I've had my XL for two years now and except for the engine and some rear aluminum hub carriers and aluminum tie rod ends it's all stock. I love it it's reliablle as a hammer and just as tough.Iit doesn't need hundreds of dollars in upgrades to keep it running. And I bash the crap out of it. I'm talking huge air jumps like 15ft. in the air and distances of over 50ft. with some pretty nasty landings sometimes. It just keeps on coming back for more. I have landed straight on the nose, on the lid, cartwheeled it, flipped it, hit a tree and it just keeps on going.