N54 JB4 or Evolve
Whats up fellow BMW lovers. I have my new baby being delivered to me in a week. 2009 135i. I want to tune it but i have pretty low car experience and definitely dont what to F things up. Seeing as how I am less experienced which would you recommend in regards to ease of installation, ability to uninstall for warranty and over performance. JB4 or Evolve tunes?
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