n55 forged

  1. F16-r1

    11 135i Motor question

    So, I am buying a 135i M Sport Manual Coupe and the dealer has given me an option to drop in a forged motor or a low milage used stock motor. My question is where to get a forged long block and is it worth is or should I just stick with the stock motor, also note this is going to be my daily and...