where in the bay area can i get my gsr head ported and polished? i was told to go to dnr but id rather not. any other shops out there? also id prefer a flow chart which shows before and after results. thanks

 

What about Justin from Sinister?

 

Blacktrax ports heads and I believe they will flow bench it. Jeremy at Redzone Performance will also port heads. He used to work for Blacktrax and has good connections to skunk2 as well. I had mt head ported there. Good job and a cool guy.

 

i like DNR but ??????? Blacktrax is a good shop to go to i know a guy in the city who ports head holla at me if you want more info ?