What numbers should I expect with this ?

Hi there ,

I'm running a 2002 Honda Civic Type-R (euro spec-LHD) K20A2 EP3

I have IPS K2 Iron core cams
Wiseco 11.7cr pistons
Toda exhaust cam gear
Eibach dual valve springs
Skunk2 ti retainers
DC 4-2-1 ceramic race headers
2.75" custom mid pipe
HKS 3" Ti Carbon muffler
RBC Intake manifold
GruppeM Air Intake

What numbers should I expect with this combination?

And also should I change my headers ? What are your suggestions ? I found a Buddy Club race headers , should I go for them ? And also the diameter size of the mid pipe too ? Is it too big ?

Thanks a lot...