Yea OK so it is threaded... that's what I was afraid of -- the AEM intake is def. not threaded, neither are most (if any) of the vacuum lines. I guess this is where it gets complicated!

Any easy way to make threads? lol... I will probably end up with silicone for these if this is gonna be a huge PITA.

 

You don't have to have threads. You can use fittings that have worm drive clamps to tighten the hose/line to the something that doesn't have threads.

 

But those clamps look like *** for what he wants to do. Its easy to make threads, and easy to screw it up. You need the exact size of the fitting, so you can buy a tap. It basically screws in like a screw, and cuts threads (watch out for debris). Just dont break the tap in the part ( 99% of the time, part is trash at that point...tap is harder than drill bit). But, I have done hundreds and broke maybe 5 taps total. Go slow, back and forth, and dont force the tap. Go in 1/2 turn incriments back and forth with oil. If the hole is open on the other side, its much easier.