Thread: new to 135i 09
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      05-20-2011, 10:19 PM   #9
Bdh821
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Drives: 2011 335i xdrive, 2012 Z06
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If you want good power gains, but a more in depth install, get a jb4. Which I recommend!
If you want just a small amount of power gains and a quick install/uninstall, get a jb+. A dci doesnt really add much power but hearing turbo spool is totally worth it to me.

Also, look into ditching the run flat tires if it has them.