Supertrapp 878-71572 Silent Series 2:1 Exhaust System SuperTrapp 2:1 Silent Series help return your bike to near stock levels without returning to stock performance. If you want your neighbors to speak to you tomorrow, these are the pipes for you. Available in both tunable Megaphone and non-tunable straight body designs.2:1 head pipe designs for maximum performance.The 2.5" collector provides maximum flow even on big-bore motors.The three-piece heat shields prevent bluing and keep your pipes lookin