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Bro... there is something else called "Tuning Box" for M54 engineClick on this link which I found on eBay Tuning BoxHope your E60 falls into one of the categories :top:And if you are not contented with the power... consider to change to lightweight pulley (only for M54 but not N52 engine) which will definitely give you extra 10% on top of your stock HP :4: I think about RM1700-2000 to change. Let me know if you are interested and I'll guide you from there!Regards,Leo
Bro... there is something else called "Tuning Box" for M54 engine
Click on this link which I found on eBay Tuning Box
Hope your E60 falls into one of the categories :top:
And if you are not contented with the power... consider to change to lightweight pulley (only for M54 but not N52 engine) which will definitely give you extra 10% on top of your stock HP :4: I think about RM1700-2000 to change. Let me know if you are interested and I'll guide you from there!
Regards,
Leo