Thread: JB4 on x3 m40i - update!!!@ 400hp+ monster
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      02-26-2018, 10:12 PM   #86
Seaz
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Drives: (2018,x3,m40) 2016,x3 2009,335
Join Date: Apr 2012
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Originally Posted by emmanuel.yoo View Post
What do you guys think about the JB+ vs the JB4? The JB+ has up to 4psi boost increase over stock, will this apply to the M40i?
jb× won't do much for you. our m40i are already BMW tuned above that
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