Just for conversation. Got my Lts on and love them but im not going to be able to get the computer reprogramed for awhile what will it do?( clam my nevers) Ion did the last tune with stock maniflods and aftermarket cat, now they are both gone.

 

it should be fine....ive been running mine without a tune now for almost a year and no problems.

 

yeah i ran mine for a while without one and it was fine . . . but did you keep egr ??

 

no i have had the egr deleted

 

I drove mine for a couple of weeks before I finally got my tuned PCM installed. The only problem I experienced was an SES light but there were no driveability issues.