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Dynomax ultraflows...has it all and is the number one choice in F.A.S.T. and PSMCDR for a reason....




Really...??? Thats telling right there.

Is this what the winners use? Dudek? all those 10 second guys?

But also, is there more to it? as in, perhaps with all that cam wizardry and exhaust limitations there might not be a need for the best flowing muffler out there? Probably not... seeing how much a 2.5" exhaust IS such a restriction on a 600+HP engine, but its still worth asking.