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      12-07-2017, 01:20 PM   #3
apexlocator
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Drives: 2014 M5
Join Date: Feb 2016
Location: socal

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The Delphi and Bosch coils are the same size/height. The spark plugs fit into both at same depth, although the plug must "click" into the Delphi coil.

Since I did one cylinder at a time, I could see the Delphi coil did not seat fully compared to the Bosch next to it; could not get that click to full depth with the Delphi, despite all efforts and use of a little dielectric grease.....don't know how you were able to do it Used2be.
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