I have been using Dynomax Super Turbo mufflers on several of my vehicles since 1989 with improved performance (more acceleration in the skid lane) and better fuel economy on the highway than factory OE equipment. The Dynomax Super Turbo series features exclusive patented flow guides that reduce internal turbulence and ensure that the Dynomax Super Turbo lets almost as much air through as a straight pipe! a soft, gentle power sound without harsh, police-attracting window rattling noises. Clickβ¦