Carbon Fiber Rear Diffuser - BMW G80 M3 & G82/G83 M4 model y If you're running E85 or

If you're running E85 or ethanol mixes in your N63 or N63TU powered BMW

M40i / M40i xDrive

and boost adjustment with the FREE JB4PRO app

and GLA250 AMG models

except during extreme heat conditions where sealing off one inlet may be beneficial

Carbon Fiber Rear Diffuser - BMW G80 M3 & G82/G83 M4 model y If you're running E85 orThe Palenon Performance Premium Carbon Fiber Rear Diffuser is the ultimate upgrade for the rear end of your BMW G80 G82 M3 M4. This high performance G80 M3 rear diffuser combines aesthetics with function, designed to enhance the aerodynamics and overall appearance of your vehicle. Features Rear Downforce: Engineered to increase rear downforce, improving stability and grip at higher speeds. Aerodynamic Efficiency: Optimized design to reduce drag and