Muffler instead of cat help

[AbramF_496]

Magnaflow also has a spring loaded muffler flap built inside their muffler

When on regular light throttle it is very quiet and on high wide open throttle the flap opens up and it roars


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[AbramF_496]

My bad it's a dynomax not Magnaflow even though I swear it was. Here's a link and some write up from the site

http://www.motoiq.com/MagazineArtic...t-muffler-dyno-test-does-quiet-mean-slow.aspx

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[df2x4]

Just what I want in my muffler... Moving parts.

 

[350chevy719]

That's actually genius! I may look into that

 

[SkyHighColorado]

Muffler bearings might be real!!! Lol dynomax makes quality exhaust parts imo. I run 12" race bullet

 

[AbramF_496]

Bearings? It's just a spring loaded flap lol


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[df2x4]

I agree that Dynomax is generally a decent brand to go with, however that design strikes me as pretty dumb. Having seen the inside of some old mufflers after they were removed, I don't even want to hazard a guess as to how long it would take for that flapper to stick shut. (Or open...)

 

[350chevy719]

Yea thats what I was starting to think about. Well since I'm holding off on the lift until spring I'll just spend the extra and get a complete system done. Maybe some long tubes, x pipe, and muffler on each side.

 

[GMRedline]

I would go with Flowmaster. They don't use internal packing material so they don't wear out.

3" in 2.5" out

Flowmaster 9430502 - 50 Series Delta Flow
Flowmaster 8530552 - Super 50

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Or go 3" in to 3" out.