How long does it usually take for a new exhaust to break in?

 

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?

 

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

 

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.

 

I noticed my exhaust getting louder a few months after I had it on.

 

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.

 

Yes, it will get louder with time.

 

this

 

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.

 

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.

 

My flowmaster got louder after about a month.

 

The sound of my 40 series Flowmaster hasn't changed since I've had it

 

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.

 

I think they messed something up it sounds barely louder than stock..... It's a 40 series delta flow.

 

U guys hav urs dumped or what? Mines out the back... Center in- dual out

 

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

 

SHould I take it back to the shop or just wait and see?

 

Drive the **** out of it, then see what you think

 

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.

 

DING! We have a winnar!!

 

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

 

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.

 

I always thought all mufflers get louder with time.

 

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.