egt/cht from an aircraft. The best monitoring system I've seen for a decent price. Just swap the leads for the cht to a large sparkplug lead, and mount under the spark plug, then you have full knowledge on your spark and head temps..... then mount the egt sensors to the header, and find out your egt's per cylinder...and it cuts the trouble shooting down to 90% when you have a proble...and you can monitor it at a blink of the eye while racing. Plus I have the Halmeter wideband O2 sensor for the mixture...and the haltech E6K to access everything else....from a laptop monitor to full driving tuning.