POLISPORT Complete Body Kit - White - YZ 250F/450F 90767 Neighbor Hater Dual Cut Slip-On Mufflers The exhaust valve race uses

The exhaust valve race uses the factory exup hardware alongside the Graves EVR valve and custom mapping to improve low to mid-range rpm and small throttle opening torque and drivability to create and better powerband and ride

What Graves has been telling our customers is that they should purchase the FTECU flashing kit when they purchase an exhaust from Graves

2 lock nuts

OE color-matched for direct replacement or "works" look

The 2017 Yamaha R6 / 2015-2018 Yamaha R1 / R1M / R1S + 2017 FZ10 / 2018 MT-10 Flash Tune Data-Link ECU Flashing Kits : Your bike already has a standalone ECU and now you can get the tools to program it

POLISPORT Complete Body Kit - White - YZ 250F/450F 90767 Neighbor Hater Dual Cut Slip-On Mufflers The exhaust valve race usesDGP (durable gloss polypropylene) making them more durable, with a perfect combination of resistance and flexibility Exact replica of stock OEM plastic components but stronger Inexpensive alternative to OEM replacement parts Stock color match Glossy and flexible Less prone to scratches Hold color better