I have used it on both Cobras I have owned and swear by it. Even if you don't make a single HP you still are cooling the air a minimum 20* at wot and are upping your octane which are both good things and will help keep a strong motor running even under heavy abuse... I had a Kb running 20lbs with 21 degrees of timing and a 75shot and with the water meth and pump gas was able to run the exact same tune even when spraying which must people need to have a separate tune for...