Carbon Fiber Engine Cover. The BMW M3/M4 is one of the flagship vehicles from the Munich stables and so deserves to have an engine bay that looks as good as it performs. With the OEM cover leaving the engine bay looking unfinished, we redesigned it to bring much needed symmetry and give the engine a more complete aesthetic. Our cover extends across the charge-cooler while still allowing for sufficient heat dissipation with added venting. Crafted from prepreg carbon fiber, our engine cover is a direct replacement using the OEM mounts. *By request/order.