12-15-2015, 06:43 PM | #1 |
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2012 bmw 640i engine upgrades advice??
Any advice on whAt else to do to my 640i coupe as far as to gain more horse power? I've gotten jb4, burger intake, and er 4" Catless downpipe.
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12-16-2015, 07:54 AM | #3 | |
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