Getting ready to sell my subie for a new ride . Have a cold air intake which I would want to change back to stock since it's most likely the first the a dealer would notice and would not like to see . Was wondering if I put my stock intake back (and will be getting a K&N filter) will I need a retune? I have a few other modifications that are done as well that go through the tune I have, injectors, catted downpipe and fuel pump . Please let me know if I will need a retune or not. Hesitant on putting back the stock intake without knowing full details and what not .