I bare witnes to the Extech engines and they are a ballistic screamer on the track.The bottom end on that thing is absolutely insane in a buggy and the top end is impressive to say the least. The sound it makes on the track is noticeable in regards to the power it puts out. I'm definitely a believer, with or without the dyno "testing".


My only concern is the reliability of it's carburetor after a gallon or two since it is derived from a Sirio. A few of you guys might know or have experienced a bad carb more than often.