These baffles will reduce the sound approximately 2-3 decibels from the standard baffles, and offer a deeper rumble.. There are two different sized baffles in the kit, to work with the 2-5/8″(right) and 1-3/4″(left) slip-on inlets for the Vance & Hines M8 designed Touring Slip-ons.. Includes mounting hardware. Made in the U.S.A..