With 735 horsepower and a Dinan-tuned suspension, the CarBahn BMW M4 is a precision-guided sledgehammer. Okay, so what the ...
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 ...
We sampled this extra thrust in Dinan's tuned-up BMW M4 Competition xDrive equipped with ... That includes the aforementioned Stage 1 package, a new exhaust, a cold-air intake, suspension changes ...