My turbo is smaller than ours. lol. Ive been to 19-20 several times making the 450. But I have a set of type-s cams im gonna put in which should be good for making 475 with less boost. But alot of it is in the tune. A good tune will go a long ways. There are several people that have made 500+ and have over 20,000 miles on their Mahle/Eagle setup. It will take me 3 years to get 20,000 miles on this car. The only day I drive it is saturday. Im honestly more worried about the turbo making it than the motor. Hahaha