lordrobs said:Eliot- If you mean the OP's video then they are HPI Nitro 3 EVO's like the first 4 on this page and are what I've just bought and can highly recommend.
I must say I'm loving Roto-start too, maybe thats just me being lazy :O
That they are. Nitro RS4 EVO3's, mine is a little upgraded from stock, with a new suspension setup and replaced the rotostart with a pullstart unit (don't like the idea that the roto will go flat before I run out of jungle juice!). The shell's are 190mm HPI honda NSX's (roadgoing version), and painted up by me, so Eliot won't be getting one of those anytime soon

For more about the shells, see HERE.