So far, I got my S60 to "stage 0"
plugs, timing belt, control arms, transmission, brake lines,fuel pump, etc are all go.
and now am looking to get as much power out of it as possible without modding the engine itself.
I already got a EST downpipe
and Snabb air intake pipe/ w K&N filter
Im planning to get H&R springs and drilled/slotted rotors from EST.
Im still thinking about the exhaust system though, should I go with OBX or stick EST?
I still want to get a new turbocharger thats better than 13T stock model, but nothing that will grenade my engine. I heard the 16T model (
can go higher than that would a 19T do well on a 2.4t s60?
and as far as tuning systems I saw Rica and ARD are really good options, does anyone have any suggestions as far as power goes?
(This is my first tuning experience so im prepared to mess up, but as long as I have options 
)