[RossBMWZseries]

I don't have any dyno shops in my area that I can drive to. They're all a few hours away. I know there's plenty of posts regarding the stock HP/TQ on a Z4M and also specs on modified S54's. I was wondering if anyone has the same setup (or similar) to mine and if you've dyno'd your car before I'd like to know where it stands.

All mods are as follows from front to rear of car:

* RPI scoop
* European catless headers
* DKF S-pipe with short 100 cell cats
* stock X-pipe
* RPI axleback exhaust

I understand the stock numbers are 330HP and 262 LB/FT of TQ. What would the mods listed above increase the HP/TQ to? I'm talking HP/TQ to the wheels but also on crank.

I still need to tune the car (TTFS), buy M Gruppe/Eventuri cold air intake (I understand there may be little to no gain, or even loss, of HP), a light pulley kit, and RE X-pipe. How much would power would I get from this, if any?