So I should leave the stock manifold and cat on?
Although its not an arguing point but i feel that when I was running the header on my truck as to compared with the manifold i had more power, but it also could of just been the fact that it was louder.
Last night replaced almost all of my vacum hoses i still have a little more to do just need to stop by and pick some up, but it didn't seem to do anything different on my way to work this morning.
So do I leave the stock manifold on or bolt up my header?
