MY17-20 CRF 250L High Flow Airbox Velocity Stack

With the yoshimura exhaust, 550 stage 1 reflash and this High flow airbox velocity stack it completely transformed the bike. After opening the airbox and putting a high flow filter in it was very noisy under the seat, this high velocity stack made the noise under my seat disappear and its all at the back of the bike coming out the exhaust.