I installed these this weekend and ended up going the route of removing the bumper. The bumper was very easy to remove. It took maybe 30-40 minutes to remove the bumper. Most time taken was being carefully not to break the retaining clips. The horns are a snap at this point only taking about 5 min each. Then putting the bumper back on is very quick, maybe 15 to 20 minutes. It just seemed like a lot less frustrating then trying to cram in to tiny spaces.
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