What muffler...or none

W

wantingasy

Active member
I've been searching through old topics about exhausts and now that I've passed smog I want to change it up a little bit. I was considering just taking off the muffler all together, but I do have to pass smog in another 2 years. Right now I have the ATR exhaust, but want something louder. I was looking at either the magnaflow round muffler or borla. How do these compare sound wise with no muffler? I'm so tempted to just take the muffler off completely!!!
 
gjp

gjp

another post whore
Re: What muffler...or none

I thought flowmasters were not good for our trucks?
 
jjorgensen52

jjorgensen52

NHSTE - I'm the only one!
Re: What muffler...or none

most vehicles I've ever heard without mufflers but with exhaust sound like crud... :2cents:
 
HotRodV6

HotRodV6

Doghouse Member
Re: What muffler...or none

Well i have a flowmaster 40 series dumped before the axle and 3in pipe from the cat-back and it sounds pretty decent, but from my experience go with the Dynomax ultraflow welded mufller it sounds much better on the V6 than any flowmaster. and they are cheaper.

If your interested i have 2 brand new dynomax ultraflows still in the box i bought several years ago for a 2001 blazer x that i never got the chance to install them, they are center in and out and 2.5 in and out make me an offer if your interested?
 
Flyin Ryan

Flyin Ryan

hated cuz he drives fords
Re: What muffler...or none

Flowmasters tend to not flow as much as others but each truck is different soo.. anyway Im using a 3inch dynomax ultra flow and like it alot.. not too loud and has good tone
 
attackdog

attackdog

New member
Re: What muffler...or none

I went with no muffler and it sounded sweet. It can get a little loud at times but I could hear the tubo alot better. Make sure you keep the cat. I tried removing that also and ran into boost problems.
 
ghettosled

ghettosled

SYTY SUPERSTORE
Re: What muffler...or none

well every truck i have ever worked on with a clogged or bad cat converter ALL had flowmaster mullfers.. Each and every one of them.. I sense a pattern :)

Personally i recommend straight through 3" in/out.. Dynomax, Magnaflow, Borla, etc.. With a turbo motor you want the least amount of backpressure possible..
 
SY2455

SY2455

70's Veteran
Re: What muffler...or none

wantingasy said:
I've been searching through old topics about exhausts and now that I've passed smog I want to change it up a little bit. I was considering just taking off the muffler all together, but I do have to pass smog in another 2 years. Right now I have the ATR exhaust, but want something louder. I was looking at either the magnaflow round muffler or borla. How do these compare sound wise with no muffler? I'm so tempted to just take the muffler off completely!!!
Click to expand...

If you want. Listen to these, and tell me what you think. I have no problem with smog inspection.

http://www.350ci.com/syclone
 
TYTILIDIE

TYTILIDIE

METH HEAD
Re: What muffler...or none

I say no muff. I had my exh built by a local guy. We put 3" CAT and out the back and I think it sounds bad ass. I actually get compliments that it sounds mean. It really isnt too loud with no muff IMO.
 
HotRodV6

HotRodV6

Doghouse Member
Re: What muffler...or none

Well if anybody remembers way back when these trucks were built, GMC's origianl idea was to not hve a muffler from the factory, because the turbo and the cat provided enough sound deading. But the emmisions people got involved and said it had to have a muffler.
 
MRKING

MRKING

New Parts for Old Trucks
Re: What muffler...or none

TYTILIDIE said:
I say no muff. I had my exh built by a local guy. We put 3" CAT and out the back and I think it sounds bad ass. I actually get compliments that it sounds mean. It really isnt too loud with no muff IMO.
Click to expand...

Thats the same as on my sy . I cant wait to hear the new turbo setup through it , and i hope it isnt to loud .
 
HotRudyRod

HotRudyRod

New member
Re: What muffler...or none

I have what i believe to be the stock muffler, its called some like bulldog or pitbull and a exhaust valve right after the cat and no filter or anything on the turbo and when i open the valve the turbo's sound is just badass! It sounds LOUD and the wastegates flaps are fun too, then i just pull up the lever thats instaled behind the passenger seat and voila! no noise at all. The muffler sounds good at WOT but nowhere near the valve.
 
SY2455

SY2455

70's Veteran
Re: What muffler...or none

HotRodV6 said:
Well if anybody remembers way back when these trucks were built, GMC's origianl idea was to not hve a muffler from the factory, because the turbo and the cat provided enough sound deading. But the emmisions people got involved and said it had to have a muffler.
Click to expand...

It was the noise people within GM that made them put mufflers on, so they could bring down the drive-by noise 10db.
 
ZavzTy547

ZavzTy547

Senior Member
Re: What muffler...or none

QUICK STORM said:
can't view the videos
Click to expand...

I have a 3" cat and no muffler and its nice and mellow at idle but it can get pretty loud when your driving and will get annoying after awhile, If I'm in a parking garage, it will always set off someones alarm.
 
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