This 2025 M4 Competition xDrive blends heavy-duty hardware with precise alignment and aero. Mad US cold air, Fat Boy downpipes and a single midpipe free up flow while Mad’s exhaust flap control and BimmerCode flash module tune responsiveness. Suspension and steering arms from BimmerWorld and AutoTalent plus adjustable toe arms and tie rods dial geometry for track or street. Racing Sport Concepts carbon splitter and MegaChip splash guards finish the package. It’s a modern, adaptable M4 that can be refined for tight track work or aggressive street driving.