88-17 HARLEY FLSTC: Vance & Hines Hi-Output Grenades 2-Into-2 Exhaust (Black With Black Tips) Hi-Output Grenades break new ground with innovative three step mufflers and tapered CNC-machined billet end caps. Staggered for a commanding stance, Hi-Output Grenades have a strong deep tone and are available in chrome or black with a variety of end cap finishes.Aggressive deep tone.Innovative 4" three-step muffler design.Super Bung technology - will accept 12 or 18 Will NOT fit models with saddlebags.Note: For closed course competition ONLY. NOT intended for street use.