I sure wish someone would post a video with those dual mode mufflers. I'm really curious to hear them.mod9 said:I just bought a set of the Ford dual mode mufflers for my 69 but will not have them on for awhile. The way they work is the exhaust enters the muffler. While at low RPM they go through the different baffles in the muffler. Then when you hit somewhere around 4000 RPM (from what I am told)a spring loaded valve opens and the exhaust goes through another pass that is straight through.I am told they are very quite at normal driving. Can not wait to get them on.
Gotta agree on the Magnaflows. Took the old glasspacks off :thumbsdown: Bad drone at cruising. Put Mags on. Very quiet....until you get on it and them it's like open exhaust. Don't have quite the engine you do. I imagine yours would only sound better.ralph said:flows sound pretty good to some people but they are not the greatest for HP, dynomax ultra flo, borla, magnaflow all sound great and wont kill power. Glass packs are old school and not really performance mufflers except like race bullets. I'm not a fan of flowmasters as they have a tinny sound and drone like crazy, for the price i dont think you cant beat a magnaflow,they are very similar in design to borlas but cheaper.