On Sat, 08 Dec 2012 20:04:36 -0500, MoPar Man > wrote:

>BobMCT wrote:
>
>> > I've been looking into various brands (Walker, Magnaflow,
>> > Flowmaster, etc) and can't really find anything made with
>> > stainless steel that matches the dimensions of the factory
>> > OEM muffler.
>>
>> Unless you're doing an exact MoPar replacement then as long as the
>> lengths are correct you shouldn't be concerned. I've not seen any
>> performance exhaust mufflers that are perfect matches.
>>
>> I replaced my factory exhaust system with a Borla SS set and the
>> pipes were larger in diameter, there was no reasonator and the
>> mufflers were smaller. But the double walled chrome tipes still
>> came out the back where they should be. And there is no comparison
>> to the tone improvement.
>
>My current muffler is still functional and intact, but when-ever the car
>has been put on a hoist, it's been pointed out that the muffler has many
>outer-shell perforations - none of which seems to be causing any changes
>to the exhaust sound.
>
>The only thing I want out of my exhaust system is for it to be quiet.
>
>I have no care or interest at all to try to achieve any sort of exhaust
>tone our particular sound. Just quiet. Urban life is noisey enough as
>it is.
>
>I'm wondering if the degree of "muffling" is proportional to muffler
>volume...

You could wrap the muffler with metal tape like they sell in home
depot for ac ducts (metal tape, not duct tape). My main worry with
perforated muffler would be exhaust gases getting into the car.