Prone to splitting after a big wack! so worth keeping a spare
This pack gives you 1 Front & 1 Rear (they fit both sides)
They can take a while to fit as you have to remove quite a few things :( not something I'd want to tackle at a race.
I see Modelsport sell the rears in pairs, it's a shame they don't do the same with the front as I now have 3 spare rears and no fronts :(