Greetings........ I bought your product in October, and it sat on the shelf till I got around to putting it in the truck with 41575 miles on it, till mid December. I sure with I had done it sooner. After only 200 miles on the product, I noticed much more power, smoothness, and general response out of the engine. Then, the best part; A little over 2 miles per gallon better gas mileage. This is a fantastic product. I would recommend it to anyone that owns a vehicle. I plan on putting it in my Harley next. Will let you know the results. But I can imagine, being air cooled, it will really help as far as operating temperature is concerned to have a "CLEAN" engine. Thanks much......