Evolution Racewerks Sports Series 4" High Flow Catted Downpipe for B46 Engine (US Spec)

CAUTION: This product is intended for OFF ROAD COMPETITION USE ONLY. Not legal for use on pollution controlled vehicles upon public road/highways. THIS PRODUCT IS FOR SALE FOR ALL 49 STATES EXCLUDING CALIFORNIA.  In addition to vehicle use verification, a Vehicle Compliance Waiver needs to be signed. THIS ITEM IS NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHILES IN THE STATE OF CALIFORNIA.  The item is for sale for international customers without restriction. Ease of Installation: (1 Easy, 5 Hard) 3 Installation Guide Parts Checklist Key Features: Now available for the 2016+ 230i / 330i / 430i / 530i / X3 30i / X4 30i / Z4 30i/20i.B46 Engine! High Flow 200 cell metallic catalytic converter used Horsepower gains of 9 to 11 whp average (gains will vary based on modifications of your vehicle). Higher Max Horsepower Power Curve Torque gains of 15 wtq average (stock boost) up to over 20 wtq (Software upgrade) (gains will vary based on modifications of your vehicle). Higher Intial To