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So the X4 is a better tool than the diablo in the long run? Im mildly familiar with email tunes from my 04 Cobra...but def nothing beats a dyno.
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2014 Ashen Gray Metallic 2SS/RS M6
CAGS Skip-Shift Eliminator
1LE Strut Tower Brace
GMPP Track Pack Axleback
Halltech CAI
Fuse Pull Mod
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