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trebila trebila is offline
Posts: 1,278
Join Date: Mar 2013
Car: 135i
Default 03-09-2015, 05:27 PM

I've used Bosch ones, tried NGK and didn't see improvments on the logs, so switched back to bosch.
I really like the OEM style bosch plugs.
Not sure if one step colder plugs are needed when you use high mix of ethanol.

FBO N54 AT 135i 'vert with JB4 and Trebila Performance custom flash
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