Overview Reviews Product Description Brian Crower Valves - 31.1mm (STD) Intake - Yamaha YXZ 2016+ / Arctic Cat XX 2018+ Product Videos Custom Field MPN BC3850 Product Reviews Write a Review Write a Review × Brian Crower Brian Crower Valves - 31.1mm (STD) Intake - Yamaha YXZ 2016+ / Arctic Cat XX 2018+ - BC3850 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *