Here is my 2010 997.2 GT3 dyno (higher # is with exhaust, but lost low end trq) other # is stock. Pretty flat line. Gt3 makes 317 lb ft and 435 hp .... M3 is 295 lb ft and 414hp
Porsche did an amazing job and so did bmw. You have to consider that the porsche costs a lot more. Although you could pick up a used 997.1 GT3 which had 299 lb ft and 415 hp out of a 3.6 liter flat 6 for 70k
