glasspack mufflers?

[mgcook]

im thinking about doing a 3" downpipe, and making my own custom 3" exhaust with one of these

basically it will come straight off the downpipe into this muffler with a turndown.

i want to keep it as quiet as possible, but i know it will still be somewhat loud. does a longer muffler make it quieter? should i put a resonator before the muffler? 2 mufflers?

comments and suggestions welcome

 

[GUY]

If yo are just gonna have straight thru 3" with a glasspack.....it will be loud. but it will sound good. glasspacks sound good if you have at least 3" exhaust piping otherwise it will sound all choked up.

 

[xveganxcowboyx]

That one tapers down to 2 1/4 inches. It talks about using a decrease in piping size to speed exhaust velocity. This is not going to help you free up power. If you're doing 3" do 3"

 

[mgcook]

it was just an example. and i dont think im using one of these now. i should be able to fit a regular muffler right after the end of the downpipe, and im going to do a 90deg. to a side exit

i.e

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[tstkl]

yea Ive been thinking about having just a downpipe with two resignators and then a muffler, will this be failrly quiet? (yes louder than stock, but by much?)

 

[xveganxcowboyx]

I've been planing on doing a DP, high flow cat, 1 or 2 resonators and just a 2 tip splitter. I'm hoping for a not-so-loud rumble below 3K. After that I don't care how loud it is.

As for the short exhaust ideas remember that you will lose ground clearance with a side exit, gain cabin noise and may not actually devrease back pressure. A well done cat-back doesn't have many bends. A side exit requires at least 1 90 degree turn.

Also, I've been told many mufflers don't hold up well to the heat that is seen so close to the engine/turbo. Not 100% on that though.

 

[mgcook]

im probably not going to run any resonators. it will just be the downpipe with the s-bend, the 90degree bend and the turndown. it will actually make all the exhaust exit right infront of the rear tire. so there won't be that much cabin noise. i might run a glasspack as a resonator then a autozone turbo muffler (really quiet, close to stock) to keep the noise down.