Patriot Exhaust H1133 3" Exhaust Cut-Out Hookup Kit High quality Zinc Plated Steel Y-Pipe Hook up Kit for use with 3 Dougs electric exhaust cut-outs. Includes band clamps for easy hassle free installation. Also available in 2.5 diameter Un-cork your exhaust with the flip of a switch from you dash Ideal for race tracks that do not require mufflers