If im installing a

ets v2 extreme catback
ets o2 dump dp
and hfc cat

do i need a tune right away or i can run the car with out a tune for a while? any input guys>??

 

you're fine if you don't floor the car, but since you free'd up a lot of restrictive back pressure in the exhaust system your AFR's are going to change and it will need retuned again. but its safe to drive on it as long as you stay out of boost.

 

way wrong section for many reasons...