I am aware that some other systems now use a Whipple or Rotrex charger but APR's conversion is much more factory looking and they are the largest distributor of Eaton chargers so know their stuff.
If I was to ever return to R8 ownership I would probably look at the Heffner TT conversion on a V10 - but I will have to wait until my two sons are driving first as I still need 4 seats until that happens!
I came to gtr ownership after a list of extensively modified audi's. one of which was a 4.2 v8 that seen 3 different kits.I won't derail your thread mate as the car is lovely BUT I've never seen an apr supercharged car make anywhere near stated power. Twin turbo v10 is certainly where it's at all the best