[r8dream]

yes i found one for £3500 with 11000 miles on it,
so 480hp or 420hp, but the important figure is 475ft/lbs torque to the rs4's 320. plus a bit of trouble to run the fsi ,ecu, dash cluster, key switch and pedal ass. anyway numbers don't matter, it's just i like tinkering with my machines.
gm ls engines have an insane level of aftermarket support. including coming with alt., ac comp., ps pump, brackets, loom, ecu, pedal ass., plus it's all brand new and can use pre-made headers.
just need s5 gearbox, adapter plate, flywheel, motor mounts, and fabricate a few bits and pieces.
the real tough bit will be trying to adapt the s5's torque vectoring diff. with all sensors and ecu interface.
still thinking about that one.