Which EZ did you put on? I have the new EZ Comp running on Stage 3 (out of possible 5) and I find EGT's around 700-800 at cruise, no smoke, and improved fuel mileage. Recently got 21. 5 on a trip with no trailer towing. Also, my wife comments on the fact that the engine is quieter than it used to be. I am continuing to gather stats on the various stages compared to before the installation. It has now been on just over 5,000 miles total since installation on June 5.