Will a high flow air filter + a new turbo inlet require a tune?

http://www.maperformance.com/coswort...-20004232.html

+

http://www.maperformance.com/cobb-tu...shi-evo-x.html

Not really. Purchase away!

You're not going to see any performance gains from those parts..

everyone says that you can do an intake and not tune it and be ok, obviously a tune will net you the most power increase, so i threw my agency power short ram intake with a freshly cleaned and oiled K&N filter in the other day and took it for a drive, well its nice and loud and thats awesome, but i shortly after install was driving and threw a p0171 short term fuel trim too lean, cleared the code and drove like a little old lady for a few days and never threw a code, so i decided to boost it a little again and boom threw a lean code again, so id say definately get a tune, A so the car runs correctly and B to get the most power out of your mods,

I just threw on a cobb AP and slapped on the stage 1 ACN91 + CHFF OTS tune. Seeing knock on the Ap at 5.5k+ RPMS. Been told it's koo and my engine won't explode. Besides the the filter and turbo inlet I have an AMS UICP, getting an ETS v2 quiet soon. It's all i can afford for now xD.