• 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 “dual swivel end retention springs”. • Tuned length megaphone with optional baffle. • O2 sensor bung in collector for wideband air/fuel ratio monitoring. • Weighs only 10.2 pounds, over 18 pounds lighter than the stock ZX-14 exhaust. • Includes spring puller tool. • Fuel maps available for many combinations.