I used DD4H's new product today in place of jig-a-loo, although a great speed gain that I was hoping for was not observed I did gain a few thousandths of speed. My street stock car "Excalibur" at the Jan race ran around a 2.978 on average on my track which ran a 2.994x average on the league track. After the use of Blue Thunder my car picked up to a 2.975 on average. So if you have any question on weather or not BT is a good product, I wiil say that it is a good alternative to jig-a-loo, no doubt.