F8x Performance Side Skirt Extensions (M3/M4) Chassis:M4 Through countless hours of R&D

Through countless hours of R&D we were able to make the same size valve flow a staggering 60% more than the original design – that means 60% more air is blown off per cycle

This kit works with any chargepipe available without restriction due to our unique mounting brackets

just simply take your old ones off and snap these in

F01 / F02 (2009+) > 750Li

F8x Performance Side Skirt Extensions (M3/M4) Chassis:M4 Through countless hours of R&DUpgrade the side profile of your F8X M3 or M4 with a set of Performance Side Skirt extensions! Fitment: 2015 2020 F80 F82 F83 M3 M4 2x2 Carbon Fiber Weave High Gloss Clear Coat Professional Installation Recommended