I have an 05 X that has 155/30 Warren, MTW stage 2 , reg fuel return, 4" MDRP exhaust straight through, Thumper 1, ARP studs running Gear Head tunes. I just added BD exhaust manifold, Odawg 3 intake, and full force 80 FICM tune. The shop that did these last mods listed didn't think there would be a need for a new tunes. I just got the truck back and really can't tell any seat of the pants difference before and after these last mods. What are the thoughts for not changing tunes, are they needed or not? I like this shop and think they are great but they seem to be more of a powerstroke repair shop than performance shop. Thanks to all for helping.
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