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I have owned a 2005 FLSTCI for about a month or two now and all the work was done prior to me owning it. Aftermarket breather (i believe its the one you buy from HD) rush 3 inch slip ons and according to the dealer the software download has been done as well. My ears may just be hearing things but when i get on the throttle around the 50-60 mph, most noticeable around freeway lane walls or inside a tunnel or overpass i hear a whistle/squeal noise. It almost sounds like a turbo spooling up. While the sound is pretty cool, im almost certain its a sound of inefficiency from somewhere. I made sure the head pipes were tight, and ensured the clamps going to the slip ons were tight. am I looking in the wrong area? or am i maybe just hearing things... Thanks.
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