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ADM or Lingenfelter or Hennessey or....
Just finished the break in on my '14 ZL1 and I'm thinking about having a 700 or 750 package installed. Looking for input on who would be the best to do the work. I'm 25 minutes from Hennessey, but not inclined to have them do the work based on the volumes of bad press about them.
Any advice/recommendation is appreciated....
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