They(those Super Charger guys forge their name) did a 3.8 in a 987 in the last issue of Excellence (CaymanS in the works as well) and Excellence weren't really blown away. Sounded like these tuners need to just quit BS'ing and go right to the 996 MK2 GT3 engine.
The Excellence guy complained about the upgraded brakes being too good for the power on hand. All bite no bark?