I chose Dinan so it was matched to the other Dinan mods. I did every engine mod to get to stage 4 engine and transmission software. Also because I knew the hp and torque gains I could expect. I have checked their numbers and they are conservative. I don't know much about other options but have heard Dinan is on the high end $$$ wise. Also Dinan must be installed by au

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas