I have 07 Mini S with JCW Tunning Kit, it is fast, but I would like to increase the HP to about 220 to 230, any suggestion of how to reach that goal....

 

Turbo back exhaust would be a good start.

 

I have the JCW kit as well,I added all the Alta tubes and the air diverter,that really helped the engine breathe better and sound better.The car seems to better throughout the full range. I have no idea what the horsepower gain has been,but the car is stupid fun and plenty fast.You could also look into a larger intercooler and Alta's new Turbo unit...Best of all give Adam a call at Alta and pick his brain....Let him know what your thoughts are about your car and what you want to acheive....I am really happy with my JCW ECU and the exhaust with the Tubes seems to work and sound great,Adam may suggest their downpipe,that may have to be fiited to your JCW exhaust...Hope that gives you something to talk with Adam about and don't forget about your suspension...enjoy the car...