Is there any problems or differances in using two 3 inch by 16 inch mufflers one after the other as compared to using one 3 inch buy 30 inch muffler? The reason I ask is that it is $100 CND cheaper to buy two mufflers compared to the one. Also I have heard a 2.5inch by 30inch, on a second gen, and it sounds sweet. I beleive that the length of the muffler determins how loud it will be. So should the 3inch sound the same as the 2.5 inch relativly close?

*edit* the mufflers I'm talking about are dynomax ultraflos ---> straight through

 

Check out the text from the Mazdatrix website:

There are many systems and pieces on the market for Rotarys. We have seen and/or tested virtually all of them, and only offer those we know work well and will LAST. The exhaust heat generated by a rotary engine is TRULY IMPRESSIVE. If the first muffler is not packed with stainless steel material it will not last. We have measured the life of some front (non-stainless) mufflers in MINUTES or BLOCKS DRIVEN. Standard type "Glass Packs" used as front mufflers normally last between a few hours to a few weeks. "TURBO" rear mufflers (obtained from local speed shops) actually work reasonably well as rear mufflers, and seem to last around 6 months. If you insist on using this type, at least try to fabricate your system such that they are easy to replace frequently.

Be sure that the Dynomax's construction will withstand a rotary exhaust.

 

Its not a question of wether the muffler is going to last( it will ) but if having two mufflers in series is going to be louder / cause more back preasure than running 1 muffer of the same size as the two.... See the 1 3" x 30" muffler costs just under 300. and If I wanted 1, 3" x 16" muffler its only 85 bux, so Its cheaper to run two smaller(not as long) mufflers than it is to run one long one.