Features: The 3" muffler body morphs to 3-1/4" at the rear. The constant-velocity cores are designed specifically for the M8 engine platform, to provide the best sound and performance. Includes 2" constant-velocity cores for exceptional sound and performance, as well as the bonded E-glass and stainless steel mesh. If you're looking to get the most sound out of your Softail, these are for you. For riders who think that too loud is just right. Sold in pairs. Made in the USA.