Anyone have an opinion about Dynatech Split-Flow Mufflers (specifically the 4.5x7 oval) about sound or flow?

Also, anyone know anything about their PowerCat converters? Their site says they flow 396 cfm, which doesn't seem very good compared to Pypes 450 cfm and RandonTechs 598 cfm.

 

Anyone??
I've seen alot of posts saying not to waste money on the Radom Tech cats when you can get something comparable for alot less money, but all of the higher flowing cats are in the $140-150 neighborhood, so for over 100 cfm more flow, why not get the RTs for only about $25 more?

 

I just noticed this. The less expensive cats use a ceramic type core while the more expensive cats use a metallic core. In extreme higher hp situations, the metallic core may hold up better and survive a rich fuel problem or similar better than a ceramic type cat. If you don't have a unique heavy application, the ceramic cats should be fine. CFM ratings can be misleading. Make sure the cat inlet and outlet sizes match before comparing cfm.

 

Thanks for the info Ccass on this and my other post about cats.
Right now it will come down to what will fit in the space I have. The Pypes mini's are the smallest at only 7 inches, the RTs are 11", I'll go with the RT is I can. Yes, all the cfms were using the same 3" diameter.