The original Mammoth's shock towers are just crap... They bend very easily because they are made of 2mm thick aluminum. XTM has 5mm 7075 upgrade shock towers for it though, and I've never heard of anyone bending one of those. The Mammoth ST, on the other hand, has 4mm shock towers stock, and they aren't as tall as the original Mammoth's shock towers. Unless you smack into a tree at full speed, these towers aren't going to bend. XTM also released a center differential upgrade for racers. It's also good for bashers because it helps to protect the driveline from those on power landings.