I'm sure the car is still 50/50. The weight difference of the s54 is negligible and since most of the engine sits behind the front axle you probably won't feel much of a difference. You also shed some weight by getting rid of the secondary air pump, traction control, fuel return lines etc.. it may have even shed some weight.
Originally Posted by Blackedout95
Looks incredibly sweet! Congrats man.
btw curious if you know what the balance of the car is now, was that affected?