Help PLEASE!

I want to change my STi BB which is on a MY02 WRX.

I want to change it for a Firestorm ;) so what will the increase in BHP be (if any)

If i want to increase the BHP further do i then need to change the mid section :confused: or is this called the centre section :confused:

Whilst posting are there any "cheap" ways to further the performance of the car ie Dawes device (explain this please):)

Above all would any of this invalidate the warranty

Cheers

Pete ;)

On the warranty bit, I think any of it would invalidate it :) Although most garages would probably let you off with the backbox...