Right now I am running an 80 series flowmaster but I am curious if anyone has heard what a Dynomax Crossflow Race Muffler sounds like. Also if you have how do you compare the interior and exterior exhaust sound in comparison to the Flowmaster? I have heard the 4" bullet and that sounds pretty nasty which is what got me interested in this muffler. My exhaust consists of Heddman shorties, catco 3" cat and 3" catback with dual 2.5" outlets.

the dynomax ultra flow welded race mufflers will be 1/2 the noise of the flowmaster, inside and out.
make more power too.

Go with the dynomax. I changed my 80 series for a dynomax bullet and I couldn't believe the difference. You will feel the difference! They sound awesome aswell. I don't know about the muffler your talking about sound wise but dynomax mufflers are straight through design and will out perform that crappy 80 series. Dynomax has a more revy performance sound, trust me. Waaaaaaaaaay better than flowmaster!!!! Less interior drone and pretty quiet at low RPM but will get real nasty when you get on it!

the bullets are loud by themselves.
make sure you get the oval welded race mufflers if you want it quiet.

bullets do sound sweet!