Maybe this is crazy talk, but i was noticing the XC90 has a twin turbo 6 cyl in it and i'm curious if there is any way of hooking up another turbocharger in the s60.

 

The correct answer is yes you can. Why? Because anything is possible.

The answer your going to hate is, it wouldn't be worth it. To get it working properly your going to have to spend the cash.

 

+1.

It would cost alot of money to do that kind of setup, unless you can do alot of the fabrication and tuning your self.

Give the guys at EVOLVE a call and ask how much it would cost to run Sequential twin-turbos, like on their C30 project.