Many thanks. Seemingly the inventory ceramic twin turbos can safely and securely take as much as 14psi. Stock is 8psi. Ive altered the air intake and de-catted and massive diameter exhaust – its now boosting to 12psi. Brett – In all probability. Depends on the pipe. My standard guidance is https://m308642.eedblog.com/26756654/the-5-second-trick-for-m4