I have been doing some upgrades to.my civic for a while and really want to move on the engine now. I have a short ram intake and short shift done.i have installed belectronics stir+ fog lights and killer audio setup. Need engine upgrades to warrant great radar detector! engine is stock i believe d16y7. Next i was thinking of upgrading the throttle body, headers+high flow cat, then fuel rail and fuel pump.
Questions.
what size mm on throttle body? 56 or 60?
Should i do other upgrades first?
Also i was told there really isn't really a high flow or high performance cat. Should i just keep stock cat converter?