so my manager has a b6 s4 (4.2) and is just wondering what the best route would be to take to get it up to 400hp...

i only have the TT so my s4 knowledge is not so good haha...

any help would be nice, thanks guys & girls

 

supercharger from mtm nothing else

 

400 HP? good luck without an MTM supercharger...
MTM Supercharger? Good luck without the cash...