don't know exactly how much power, but it's snappier then before, gas have no idea until we get the enhancer, but we figure it should be between 10 and 30 mpg extra from what we get hopefully, but until our other sens enhancer comes we don't know, and the kit we bought was about 1100 and it's for around and 8.0L. we just hope this works like we think, and some of the research we did.