I have true dual exhaust on a 350 with heddman 1 /58" shorty headers going out to dual cats and dual 2 1/2" pipes. right now I am looking at the Moroso sprial flow, Dynomax super turbo, Dynomax ultraflow, and Dynomax bullets. Which of these 4 mufflers would be the deepest, which would be the loudest, and which would have the best compromise of those two qualities.

 

definately the bullets are the loudest. i had them on my 383 for a day. i dunno what it was but they more or less acted like a resonator or something and actually made it louder than just my open long tube headers. i'd go with a couple 40 series street mufflers from flowmaster....thats what i got. 2.5" offset inlet offset outlet.

 

Tnanks for the reply. but I don't want the flowmasters I am looking at either the dynomax moroso. does anyone have any experience with magnaflow?