There is so much power ready to be released from tuning a 335i or 435i, the question is will such a car beat a stock M34? Also compare the sound of the cars at .\rbr\rbrAustin Yellow stock M4 VS Bmw 335i with Burger Tuning JB4 (map 2)and High Flow downpipes Race,Winner BMW M4 ,But not a very big gap. M4 = stock car .\rbr\rbrOn this episode of Head 2 Head, Motor Trends Mike Febbo pits two tuner cars against each other. In one corner, the BMW 335i loaded with an BMW M .\rbr\rbrBMW M4 vs Loud tuned BMW 335i Ac Schnitzer.