What is the difference between the 40 series and the 40 series delta flow. I have an 04 monte LS which series should i get? I'm looking for a throaty tone like a muscle car. i realize it won't be that loud because it is a 6 cy but i want it to sound good any recomendations???

 

http://www.flowmastermufflers.com/index.php?cat=1

Google FTW.

 

the 40 is the louder of the two. the delta has this baffling to lower interior resonance.