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e92 M3...has anyone increased their bhp yet?
I've covered nearly 15k miles in my M3 and have decided its now time for some upgrading! It's booked in with Birds in early December for a full Hartge exhaust, including 'racing' cat I believe. It's then being tickled with a remap!
The Hartge system is a whole lotta wonga but after the exhaust and the remap it should have in excess of 460bhp.
Or will it.......???
I'm having a before and after rolling road run to see exactly what the difference is but I want to know if theres anyone who has had anything similar done on their M3?
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