This HJS tuning “downpipe” is designed for BMW 1-4 series with the new Euro 6 N55B30A engines. No reprogramming of the motor control is necessary .
The significantly reduced exhaust back pressure of the HJS tuning catalytic converter not only ensures reduced temperatures in the turbocharger, but also significantly better engine response. Of course, an improvement in power and torque is clearly noticeable. And last but not least, the metal support used ensures a more sonorous sound.
Expected performance increase of approx. 10 hp for a series vehicle (see diagram)
With ECE approval, entry in the vehicle documents is not required.