Tame your beast with Khrome Werks Plug Insert for 4-1/2" HP-Plus« mufflers HP-Plus« baffles emit a deep, mellow exhaust tone that is adjustable by simply changing an insert held into the baffle by two bolts Gives you control over your "Growl Level" Produces deep, rich tones with the perfect balance of performance and sound Change sound levels in minutes, not hours Specially designed for easy installation with basic hand tools (no hammers!). BAFFLE NOISE REDUCT 17+
