Akrapovic Track Day Link Pipe Yamaha R9 Dial in your Yamaha R9 for the track with the Akrapovic Track Day Link Pipe. Crafted from stainless steel and equipped with a resonator, this link pipe is designed exclusively for closed-course competition and must be used in conjunction with the Akrapovic Racing Exhaust System. It helps reduce the static noise level at 5,500 rpm while still delivering that unmistakably sporty Akrapovic sound. Remapping is required for proper performance and optimal results. Features: Stainless-steel construction with integrated resonator Designed for closed-course track use only Lowers static noise levels at 5,500 rpm Produces a deep, sporty exhaust tone Must be used with Akrapovic Racing Exhaust System ECU remap / fuel controller required for correct performance