With some of the kits they come with a threaded bung that blocks off the EGR system. A friend of mine suggested that, instead of using a bung to block it off, it could have an O2 sensor fitted in there. That way you not only solve the EGR delete problem but can add an A/F gauge to monitor your ratios. Good for setting base mixture A/F and have an indicator of where your best economy is on throttle.