Using a glas-pac as a res...

[mx-3 12acer]

Ok, i know this has been done... i was just wondering how long of a glass pac i should get? 12"? 18"? Currently i have a Magna Flow exhaust with out res, and i would like to decrease the sound just a *little* not too much. I heard this was a great way to do it. Please post in detail since i am pretty new at the whole exhaust systems work. Also, can i do anything to the cats to make them allow more air to pass through with out being to far from the law?..hehe thanks.

[Freq2002]

I've done it with a Magnaflow muff. I used a 24" long 2" cherry bomb. It sounded tight too. Nice deep tone, none of the buzz you can get at higher RPM's, & nothing at all like the common fart cans. Best part is you dont feel like your in a Cesna at highway speeds. Still loud, but not LOUD, yanno?
While you're under there, do you have a flex joint in the sytem? Definately recomend it if you dont. A 2" joint between the down pipe & the cat will keep ya from cracking pipes. Been there, it sucked.