I put my Sceptres on and am now getting better gas mileage!! I went from about 36 miles a gallon to over 42!! I was running short off roads before. Better sound and mileage! I love em!!
Yup, 'mazing what happens when your engine doesn't waste a big part of its power just pumping air in and out. Wide open, more mixture will pass through but, at "normal" speeds, you use less because more of the power goes to the wheel.
Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python