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 rear collector for wideband air/fuel ratio monitoring. • Weighs only 10 pounds, over 21 pounds lighter than the stock Hayabusa exhaust. • Includes oil cooler bypass kit and spring puller tool. • Fuel maps available for many combinations. 1. Fits all years – 1999-2007 2. Lower fairing modification required, adhesive cut-out template supplied. 3. NHRA and AMA Prostar contingency fund for all Indy Series Exhausts. 4. VHM Low Profile Oil Pan available for maximum ground clearance.