Thank you for your help...i just bought a evo x gsr 2010, and i want to know if i REALLY need a tune if i install a greedy spectrum catback with ams hfc with the injen intake with the uicp??? With the car, i would like to do some track and want to be safe from mecanical problem that would appear because of my bolt ons... Sorry for my writing, english is not my first language... I did a lot of reseach but i always hears different things and don't know if i really need a tune... i just wish my car to be safe! If i need a tune, is COPP maps are safe (stage 1) with those mods... Thanks again!!

 

brand new car like that should be able to retune itself to an exhaust shouldnt it?

 

The injen intake don't screw up too much the fuel trim and it usually stay in the positive side with around 3-4%.

Opening up that exhaust will lead to more air flowing more easily and usually lead to leaner AFR which is not too good.

Get a wideband and a boost gauge first, then start moding the car.
Either you go with Cobb or another tuning method is your own choice to make.

 

if you gonna do some tracks, i believe a tune is much better for your car. cobb ap gives you nice gain and custom tune can optimize power