Very good product and fast shipping!
I bought 2 race gaz ultra to begin, to test. I have tested on the ICar Canada 1/4 miles and the result was excellent. Very near of race fuel for result was 3 times the prices. Tested on a BMW 335i modified (550 hp) using Cobb tuning race mode. This product work and give quality to support race mode. No light in the dashboard ,o)