V&H Competition series 4-2-1 exhaust, stainless steel

For Racing use only. Designed exclusively for drag race applications, this 4:2:1 exhaust is the ultimate design for peak power on stock, heavily modified and nitrous engines. – Quality, lightweight stainless steel construction. – Tapered head pipes and full merge collectors for maximum performance. – Slip fit collector joints with ñdual swivel end retention springs. – Tuned length megaphone with optional baffle. – O2 sensor bung in rear collector for stock O2 sensor or wideband air/fuel ratio monitoring. – Weighs only 10 pounds, over 38 pounds lighter than the stock Hayabusa exhaust. – Includes oil cooler bypass kit and spring puller tool. – Fuel maps available for many combinations