Got any pics showing where you put that horn setup MSa? :shocked: Still, I doubt very much that a 2013 RT would actually have enough space underneath the tupperware to fit trumpets that size within reasonable proximity to the compressor, so even if you did get it under there, on a 2013 there'd be a noticeable delay between pressing the horn button & getting any sound outta the trumpets!! I can see where a WOLO air horn might fit, but I'm struggling a bit finding space to add a slightly larger electric horn unit under the tupperware on my 2013 RT - my initial thought was to fit it in tandem with the OE horn, but after confirming how little actual useable space is under there, I might just replace the OE horn entirely with the much louder Fiaam electronic unit... it's not inches bigger than the WOLO units, & it looks like it might just fit into the OE space once that's out. :dontknow: Watch this space...