Tune after Short Tails and HFC's "Worthless?"
Hey guys, tried searching but no dice.
There is a tuning place in STL that states it would be worthless to tune my 09 7AT with "only" AAM Short Tails and FI HFC's.
Can anyone attest to this being true or false? If anyone is running this, any gains, or small enough to where the 600 bucks would be a waste?
Thanks, all
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