Big, bold, and better than the rest. The Vance & Hines Destroyer Oversized 450 Slip-On mufflers bring a larger-than-life look to your Harley-Davidson Touring motorcycle, while the 2-1/2" perforated-core baffles produce that signature Vance & Hines sound. Destroyers also have equal-sized CNC-machined end caps with racing flutes and a slight taper, so they work with most saddlebags and extended skirts.; 4-1/2" slip-on mufflers give your bike show-stopping good looks and a deep-toned rumble 2-1/2" perforated-core baffles produce the sound you love For best engine performance on Touring bikes with electronic fuel injection, purchase of the Vance & Hines Fuelpak (or Fuelpak FP3 for 2007 and later models) is recommended To maintain top performance, Vance & Hines head pipes and air cleaners are recommended Includes instructions and mounting hardware