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      05-08-2018, 01:42 PM   #89
DavidZ
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Drives: '11.5 E90 M3 6MT
Join Date: Apr 2011
Location: Kensington, MD

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Quote:
Originally Posted by Zap View Post
I've pondered doing this retrofit, and am comfortable with the wiring/electronic components of it. I don't have a lot of experience doing body work, though. How risky/difficult is it to drill the bumper holes properly with respect to getting the right shape and diameter? I'd hate to mess up the bumper.

Thanks!
There are crosshairs on the inside of the bumper for where you need to drill. Just drill a small pilot hole there and then use the proper stepped drill bit (mentioned in first post I think) to widen them. Some of my holes are off by maybe 1/8" due to the drill walking on the initial pilot hole but from the outside you can't tell at all.
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