Yes you need to have BAMA update your tune. For sure your speedo will be wrong. BAMA is good about updating their tunes for simple bolt it's like that.
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2015 Triple Yellow GT prem, 5.0 ,6M, PP, JLT Intake, JLT Oil Seperator, MRT resonator delete, BAMA Tune.
2013 Focus ST, 2009 Shelby GT500, 2007 Mustang GT, 2004 Cobra, 1998 Cobra, 1995 Cobra, 1990 Mustang LX 5.0, 1988 Mustang GT, 1986 Mustang GT