I have a 07 mustang gt with stock engine other than roush cai, sct x4 tuner only tuned to 91 octane and
No traction control. I spoke with sales at brenspeed about a tune and was informed they could send a tune with or without the roush insert. My understanding is with the insert it's more of a factory setup. What are the advantages of a tune without the insert and is there any long term issues by doing this without other engine mods like aftermarket throttle body? New to the tune world so...

Tuner questions