Hey Allen, gotta quick one for ya. I just recently installed exhaust cutouts on my truck. Since then, it seems like its not downshifting like it should. I'm pretty sure that I've lost a little bit of low end, but makes up for it up top. Anyways, should open exhaust like this have anything to do with the tune? Perhaps something got reset with the tune. My downshift speeds seem to be lower than they were before. Maybe its just my imagination but something seems just slightly amiss.
I hope my tranny's not going south on me.
2007 Silverado NNBS RCSB__4.8 Liter
True-Flow Drop-In/Stock Air Box(modded)/AirAid MIT, 3" SLP LM1, Shaner Ported 90MM TB, Wheatley Tuned
1999 LS1 Z28__Stone Stock for Now