[79sierra]

Originally Posted by Gregski

so now that we took care of the big exhaust leak I can actually hear the new Flowmaster 40 Series exhaust, and I'll be honest with you, it needs some work

first it has a drone sound, around 1500 RPM it sounds like you are driving in a 4 door car and your kids rolled the windows down in the back, whoa whoa whoa... annoying to say the least

so it pays to have car buddies, I convinced my Mopar buddy Seth to loan me his brand new DynoMax mufflers for a test run (on the account of his Dodge truck being sidelined do to an enjin rebuild)

Notice how you can see right through the DynoMax mufflers, they have that straight through design, you can't see through the Flowmasters like that, some will argue that they flow better than the FlowMasters, I can't say either way. Also I've been told these are not directional, you can mount them offset in front or offset in the rear, there is no Input and specific Output.

so since these be 2.5" like mine they just bolted right up, and what's the verdict?

Well, they do sound different, these have a much more raspier sound, he calls it 60s muscle car sound, but more importantly they drone as well, so I am convinced that most if not all mufflers will drone unless you tune your exhaust system (more on that later)

Check out these SpinTech truck/rv mufflers. I plan on using a set when I build my new exhaust.
http://www.spintechmufflers.com/muff...30.html?page=2