Muffler Change Only

[JOHN1243]

I simply would like to change the muffler on my 06 5.3. Something with more flow, more noise and yet not horrible sounding when the engine goes into 4 cyl. mode. Has anyone simply changed the muffler on their 5.3 dod??
I will be keeping the resonator. Just chop in front of it(giant muffler):) , chop in back of it. Put the new one on with a pipe to take up space and weld it. simple.


thanks , JOHN

[MTPockets]

You might get more noise with a different muffler, but if the 5.3's muffler is anything like that of the 4.2, the thing is HUUUUUUGE and couldn't flow anymore if it tried.

Joel

[madfx86]

If you simply replace the muffler you'll get a little more sound and a small amoount of flow increase, but if you replace more of the piping you'll get a more audible difference.

[Envoy Fan]

I put a Magnaflow 5x11x22 muffler on my 5.3L and kept the resonator on. Now I know I have a V8, but the interior exhaust noise is almost non existant. The Magnaflow is a straight thru design.

But I don't have DOD, so I don't know about any change in sound when that occurs.

[tblazing]

get a magnaflow muffler

[tjxray99]

You might get more noise with a different muffler, but if the 5.3's muffler is anything like that of the 4.2, the thing is HUUUUUUGE and couldn't flow anymore if it tried.

Joel


I know the stock muffler is huge, but I doubt that is flows as well just because of that. At least my past experience has shown this. I replaced the stock muffler on my Jeep grand Cherokee, which was as big as the I6 envoy muffler and weighed probably 50-60lbs, with a borla muffler and i noticed a huge difference. I bet the stock muffler on these is probably the same, huge but lacks flow.