Remus Axle Back Exhaust BMW F80 / F82 M3 & M4 Look no further for the best price on the F80 M3 Remus Axle Back Exhaust from Top Gear Solutions. Choose from 4 different style tips to mate with your Remus Axle Back Exhaust and make your 2014-2015 BMW M3 / M4 look and sound awesome. PICTURE: REMUS Exhaust Installed on the M4 SOUND: Aggressive Racing Sound DESIGN: Shot Blasted Finish, 100% stainless steel POWER: Power Increase, Reduced Back Pressure Lighter Construction Perfect Geometry and Precise Fitment Handmade in Austria