M4 Style Dry Carbon Fiber Trunk Wing Boot Lip Rear Spoiler Ducktail For Audi A4 B8.5 Carbon Fiber Rear Spoiler Trunk Boot Wing Lip M4 Style A5 B9 4 Door M4 Style Dry Carbon Fiber Spoiler Carbon Fiber B9 S4 Car Spoiler for AUDI A4 S4 S Line Sedan 4 Door 2017 Audi B9 A4 M4 Style Carbon Fiber Trunk Lip Spoiler. NWCarbon Haus A5 B9 4 door M4 Style Dry Carbon Fiber Spoiler. Constructed of pre preg carbon fiber using state of the art technology to ensure perfect fitment and quality every time. Lead time 3 4 weeks.