yes that is true but they do map the TCU also so that the Torque dose not kill the box, 40valve only,
whats included is
before anything starts they do a full health check to see if everything is A ok
then its stripped down compression is lowered
full Pes supercharger kit intercooled
with charge cooler and extra rad at the front of the car with a second pump for cooling the charged air,
i should point out that the 520bhp is if the car has a de-cat and free flow exhaust and ample breathing up front, pannel filter maybe,
fully remapped ECU and TCU
as for needing a 6th gear not really as i have an A8 gearbox would make for a better final drive as the A8 sits at 1000rpm lower at 70mph than the S8 anyway so a happy medium can be found,
there is a 600bhp D2 in brazil with a TT convertion running a standard Box, they are family to the RS6 gear box and there are plenty of them running Large amounts of power, i peorsonally belive its all down to a good TCU remap and no led foot all the time in 1st gear
http://www.millteksport.com/media/im...t-complete.jpg
http://www.amdessex.com/product.deta...renceID=106741