i've been told here that that is not a good idea and does nothing for performance. my car had it done on purchase and it was part of the actual hose that fits there cut to allow room for a bolt to go inside and a hose clamp to hold it.While we are on the topic of this tube, how did you guys block the small coolant port where the coolant goes to the throttle body? Mine is unhooked and plugged with a rubber vacuum cap but they rot fast and I have replaced it like 3 times. I'm about to weld it shut.
oh! gotcha. well the tube with the bolt in it would work... not pretty but probably the cheapest with the option of reusing it at a later date if you ever decide to go back to a spacer with coolant lines.Just the one port on the tube pictured above. No place to hook the hose.
Is no barb on manifold. One hole. Just the tube.Why not run a hose from there to the other hose barb on manifold?