06-16 HARLEY FLHX2: Vance & Hines Destroyer 450 Slip-On Exhaust (Chrome With Black Tips) Bigger is better. The Vance & Hines OverSize 450 slip-on line for touring models takes it to a new level with massive 4.5-inch diameter mufflers. Finished with equally large new Destroyer style CNC-machined billet end caps, the OverSize 450 fits and looks the part on baggers with extended skirts. The OverSize 450 slip-on line also puts out a big deep-toned rumble thanks to its large fiberglass-wrapped 2.5-inch perforated core baffles, which can also be tempered down with optional quiet baffles (sold separately). New design: Destroyer OverSize 4.5" Slip-on.