Have you ever tried to build a custom air intake kit and discovered that you needed to fabricate and weld a vacuum line fitting to the intake tube?  It's not always easy to do and it's likely you don't have the appropiate raw material to do the job right.

  Simply select the proper diameter aluminum fitting for your specificapplication, drill an appropriately sized hole into the intake tube and then just pop in the rubber grommet and aluminum fitting.  It's a quick and easy fix for a common problem and requires no delicate aluminum welding.