Do you guys know if the teraflex spacer will create air "leaks" or is it just as stock ?

 

Correct. You won't have a problem until you disconnect the sway bar. I would think this would apply to any lift under 4" that corrects caster.

Should have no leaks with it torqued properly. Honestly though when I get mine mod'd I'm just going to the muffler shop and have them weld up something. It'll be permanent and shouldn't cost too much more than the spacers.

 

Now you gave me the idea i might have that done. Thanks