If u own a 525,528 or 530
11-15-2010, 01:38 AM
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Hello, ive been looking for power upgrades for my 525i, and after some research and some member recomendations ive decided to buy a bms power box performance chip.....It is truly a great buy and i couldn't be more happy with it. The installation was a pain in my ass for nearly 5 hours.(advertised as simple 20-30 min easy installation) I have a 07 525i and it made a huge difference on how the car responds and drives,as soon as i set map 3 and gave it a little rev the rpms shot up to 6k rpms.I dont really know how much power it really added but i def feel the difference. 
11-15-2010, 04:28 AM
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Hello, ive been looking for power upgrades for my 525i, and after some research and some member recomendations ive decided to buy a bms power box performance chip.....It is truly a great buy and i couldn't be more happy with it. The installation was a pain in my ass for nearly 5 hours.(advertised as simple 20-30 min easy installation) I have a 07 525i and it made a huge difference on how the car responds and drives,as soon as i set map 3 and gave it a little rev the rpms shot up to 6k rpms.I dont really know how much power it really added but i def feel the difference.
Mine took me exactly an hour and 10 mintues. Only because I crossed checked the entire thing or I could have called it an hour.
Is it a pain - Yes it is.
But is there gain - Voila certianly - Super Satisfied
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