I met up with one... had to stop for it to go passed on a roundabout.. let it go by and then hammered it after him, he saw me coming and floored it...
lets just say the mid range power of the williams proved decisive, his had what looked like a peco back box wheras mine had knackered old plugs and a crapped up air filter...
I went sailing by at about 60 mph.. thats even with giving him a rolling start off the roundabout
Id back a williams against one of them any day of the week and twice on sundays.. his was a G reg though and looked in pretty ropey condition, maybe it was down on power