Did you change your air filter form the OEM filter to K&N ? It not then you should once that is done you will have a cold air intake system. Then from there you may want to do a tune but that's totally up to you!!±
1st thing I did was have my system installed 2nd thing was the cat delete by lamonster. I used the stock muffler without the baffle. Sounds great but I do want punisher pipes.... but I think I burn a little more ⛽️ gas. Peace bro!