reminds me of the jack up kit we used to fit on the yamaha dt to raise the rear suspension.look s to me like a set a pair a boliks withe a missing link rear shakle set up and he's probably using longer shocks (eg es9000) mounted at an angle to increase the leverage on them to allow them to move easier. a bit like these
http://suzuki.off-road.com/suzuki/data/articlestandard/suzuki/532005/277571/golong4.jpg
The linky thing on the springy bit folds up on itself an you bung a bolt in it to stop it flapping around when you take it on the road. Just read about em in an owld Land Rover Monthly.
its the Gon2far kit isnt it?