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I'm the black sheep here running an old school Split Second Turbo Tuner SSTT. Fairly mild bump in performance...it improved my 0-60 and 1/4 mi by .60 seconds & you just unplug it for service work. But, I bought it before the JB+ hit the market. I have no complaints.
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"The likelihood of one individual being right increases in direct proportion to the intensity with which others attempt to prove him wrong."
2015 F82 M4 - Sakhir Orange Metallic
2013 E92 M3 / 2013 E92 335is / 2010 E90 335i / 2007 E90 335i
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