Too many reflash out there, dont know which one to choose? Any suggestion guys? Anyshop in Socal capable to tune Evos?

Here's my mod list,

Espelir downpipe
Invidia test pipe
HKS Spec-R Titanium exhaust
HKS RS intake
HKS SSQV BOV kit
Walbro 255l fuel pump

Does o2 housing make big different? Should I get that before I get my ecu reflash?

 

There are several flashers in California. Yes, add the o2 before getting flashed so that you get the most out of it. Try to get a custom flash from Harman Motive, Vishnu, or Works - they're all in CA, but I don't know if they're near you.

If you can't get a custom tune, then just get a Dynoflash mail-in for $199 shipped. I highly recommend removing that HKS SSQV if you want your 05 to perform at the highest level.

 

Anything else I should get besides the o2? Where is Harman motive?

 

I told you I don't know where they are. You know how to use Google, right?

- Add a Forge UNOS MBC
- Sell the HKS SSQV and get a JDM MR DV or Forge RS DV
- Add a Buschur LICP
- Add a ported/coated stock manifold
- Port/coat your stock 10.5 hotside
- Add GSC 272s

Then get flashed.