Flowmaster Scavenger Y-CollectorFlowmaster's unique, patented Scavenger Series Y Collector is founded on the principle of Pulse Technology. The large D Shaped ports in the collectors create a large surface area to help pull the exhaust pulses from the opposing connected cylinders. This creates a cleaner burn for the incoming fuel and air resulting in an increased and broader torque curve, putting more power in the rpm range. Flowmaster's Three Year limited warranty protects the Y