BMW M5 (F10) Evotech Stage 2+ (800 HP), Mayrbek M. vs BMW M4 (F82) Custom Stage 2 (550 HP), Saak Ch. Результаты (Results): .br Take a look at the performance difference of a stock M4 vs a chip tuned M4. We talk about some of the other differences in these cars as well. The work on .br Tuning on the BMW M5 F10: * Schmiedmann Muffler delete * Schmiedmann X-pipe * Schmiedmann Catless downpipes * Burger Motorsport Stage 1 * Dinan .