When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Its not super loud, but its definately noticable when I shift from being in boost. When I drive normal (not in boost) it is very quiet. But the S trim blower is very loud, I'm not gonna lie, if you dont love the sound of a blower, the SQ is the way to go. I'm happy with my S trim but it probably isn't for everyone =P.