Despite all parts being new ... the most powerful BMW M4 featuring the S58 engine is the CSL variant. A lightweight-focused ...

Now he’s back on the scene with CarBahn, his new venture that still reworks BMW ... M4 and create a system that works seamlessly together. That Steve Dinan continues to offer packages and parts ...

CarBahn calls its G82 M4 mods its Signature package, and it retails for $20,599. There are some more CarBahn options on this particular test car that add another $9,000 to the price, in addition to ...