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      04-14-2012, 01:20 AM   #3
PR3CI5N's Avatar
Drives: 2010 E90 M 335i
Join Date: Jun 2010
Location: West Coast

Posts: 1,216
iTrader: (15)

You 100% can run just a JB4 with no other mods safely. I wouldn't own a 335i without a JB4 lol And for the DCI, I run them just for the sound purpose. On a cold night they increase hp but when it's hot they def don't help. I'd get them. Easy install/uninstall
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