zippy320
Well-known member
Ok im not going to do this to my car, but I keep hearing about Jb4s all over the place, I dont know much about what it is , only that its some sort of piggyback computer for the cars.
But do they exist for the E46 N42 engine? has anyone done it? Does it really give more power?
Is this only for turbo cars?
Thanks!
But do they exist for the E46 N42 engine? has anyone done it? Does it really give more power?
Is this only for turbo cars?
Thanks!