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  #1  
Old 07-09-2010
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Icon2 Exhaust break in

How long does it usually take for a new exhaust to break in?
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Old 07-09-2010
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Define "break in"

I've never heard of a time period for exhaust to be broken in. It should be good to go

Are you having a problem?
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Old 07-09-2010
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Yea I had a flowmaster muffler put on, but it sounds almost stock. ppl are telling me it has to break in so I wondered how long it would take
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Old 07-09-2010
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Yea it takes a good week or so depending on how much you drive to break it in. Its because from the factory they put a coating on the inside of the muffler so it doesent rust just sitting on the shelf. you have to burn all that off and then you get the true sound of the muffler.
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Old 07-09-2010
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I noticed my exhaust getting louder a few months after I had it on.
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Old 07-09-2010
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Are serious?! A flowmaster is a chambered muffler. There is nothing to break in. It'd be different if it was a Magnaflow with fiberglass packing or something.
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Old 07-09-2010
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Yes, it will get louder with time.
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Old 07-09-2010
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Quote:
Originally Posted by 0RangerEdge2 View Post
Are serious?! A flowmaster is a chambered muffler. There is nothing to break in. It'd be different if it was a Magnaflow with fiberglass packing or something.
this
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Old 07-09-2010
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They don't actually have a break-in period like fiberglass packed mufflers. However, in my experience, the exhaust tone does get louder/deeper with time. Some say they do, and some say they don't.
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Old 07-09-2010
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Quote:
Originally Posted by Andrew1993 View Post
Yea I had a flowmaster muffler put on, but it sounds almost stock. ppl are telling me it has to break in so I wondered how long it would take
Either you had like a 70 series or a 50 SUV Flowmaster put on or the muffler shop pulled a fast one on you. The two Flowmaster mufflers I justed talked about are among the quietest mufflers they produce.

I have a 50 series Delta flow on my 3.0 which has more catalytic convertors than your truck, assuming it's a 93, and it's leaps and bounds louder than factory and even louder than the Dynomax setup I had.

You should check the muffler case to see if it is stamped with Flowmaster and a series, that might take the mystery out of the quietness you're experiencing.
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Old 07-09-2010
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Originally Posted by 0RangerEdge2 View Post
Are serious?! A flowmaster is a chambered muffler. There is nothing to break in. It'd be different if it was a Magnaflow with fiberglass packing or something.
My flowmaster got louder after about a month.
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Old 07-09-2010
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The sound of my 40 series Flowmaster hasn't changed since I've had it
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Old 07-09-2010
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Neither has my 50 Delta Flow. Most other people I've known with Flowmaster's don't experience break-in either. Case by case basis I suppose.
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Old 07-09-2010
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I think they messed something up it sounds barely louder than stock..... It's a 40 series delta flow.
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Old 07-09-2010
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U guys hav urs dumped or what? Mines out the back... Center in- dual out
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Old 07-09-2010
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I don't know how they can mess up installing a muffler unless its on backwards

You've seen how mine is, When I first got it was out the back duals. It was still loud
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Old 07-09-2010
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SHould I take it back to the shop or just wait and see?
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Old 07-09-2010
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Drive the **** out of it, then see what you think
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Old 07-09-2010
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A 40 Series Delta Flow should be loud. Either the catalytic convertors on your truck are plugged up (possible) or they told you they put something on they didn't.

My setup is a 50 Delta single in single out to a magnaflow y pipe, duals out the back. It's pretty loud I think.
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Old 07-09-2010
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Quote:
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...the catalytic convertors on your truck are plugged up...

DING! We have a winnar!!
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  #21  
Old 07-10-2010
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on my 96 4 banger it has a single in dual out flowmaster 40 series delta and it sounded quiet like stock i took the cat out and straight piped it and problem solved cat had tons of build up in it thats most likley your problem
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  #22  
Old 07-10-2010
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i have the welded thrush muffler (pretty much a 40 series knockoff) and that was super quiet at first too but as it got heat cycled it got louder. my truck never got super loud though. just a nice deep tone.
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  #23  
Old 07-10-2010
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I always thought all mufflers get louder with time.
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Old 07-10-2010
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Quote:
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I always thought all mufflers get louder with time.
I thought that only applied to glasspacks
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  #25  
Old 07-11-2010
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Quote:
Originally Posted by 01RangerEdge View Post
I thought that only applied to glasspacks
You could be correct. I just thought as the inside of the muffler corroded it tended to get louder.
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