I had them put 7 NPT holes in the base. 6 -1/8" and 1-3/8" so I can keep the Tee's to a mininum. The 3/8" is for the Intake Air Temp Sensor and the 1/8" are for Boost/Vac lines. I still need to put 3 bungs for the METH Injection. 1 will go on the bottom of the Y before the Throttle Body and 1 will go in the piping right before the Intercoolers in each fender well. I will tap into the straight pipe that goes to the Intercoolers under the fender wells so you don't see them at all.