1040572
The Flowmaster is a chamber design and the dynomax is a insolated straight through design. It really depends on what type of sould you are looking for. The flowmaster should run you around 95-125. As for the dynomax, I'm not sure of, they are usually less expensive that the Flowmaster though. I have always ran Flowmaster on my vehicles. I ran two 2-2chamber flows on my dual exaust camaro, then 2-3chambers on my 72 nova, followed by 2-2cahmbers on my 85 K5 blazer (holy crap was that thing load), and will put some 3-chambers on my 88mustang gt that I'm currently building.
I have 1-2chamber on my (V6) 96 GMC daily driver, and it is VERY loud. I plan on running a 3-chamber on my 93 cherokee. As soon as I get the cooling system in shape I'll get a price on the muffler and install. The Dynomax sound very good with cars that have high flow cats or no cats at all. They need a less restricted system to sound throaty, otherwise they kind sound like a louder turbo muffler.[addsig]