Cobra 4.5 Gen2 NH Slip-On Mufflers for Harley Touring The Cobra Gen 2 Neighbor Haters Slip-Ons feature a soul-lifting boom for those riders who think too loud is just right. Features: 50-State legal (declared manufacturer replacement parts) 4.5 versions for M8 use a 2.5 louvered cores Come with black, machined aluminum tips with contrasting dual grooves. Provides enhanced sound and improved tunability for performance gains Made in the USA