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Unread 05-30-2014, 03:31 PM   #1
gombie72
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Exhaust removal/exhaust fabrication

(02' 3.7 lmtd) Hey! Just wondering, Ive heard from multiple people that removing your muffler is illegal. I recognize that it can be, but to make it legal appearently all I need is to be 6 inches behind the cab. How difficult would it be to fabricate a pipe that long that I may potentially down pipe at 45 degrees?

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Unread 05-30-2014, 05:54 PM   #2
tommudd
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Besides sounding like crap without a muffler, it would be so loud in the interior you wouldn't be able to talk or hear anything
Plus it helps build some back pressure which they need
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Unread 05-31-2014, 07:09 AM   #3
John317
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And the cab / cabin is the entire interior of the vehicle.
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Unread 05-31-2014, 09:55 AM   #4
01CHEEKEE
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This isnt a truck with a cab...it still has to come out the back...not sure where you're located, but pretty sure you need a muffler anywhere in the us due to emissions...and like they said, it's gonna sound like **** w/ out a muffler...just buy a magnaflow and be happy
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Unread 05-31-2014, 07:05 PM   #5
tjkj2002
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Quote:
Originally Posted by 01CHEEKEE View Post
This isnt a truck with a cab...it still has to come out the back...not sure where you're located, but pretty sure you need a muffler anywhere in the us due to emissions...and like they said, it's gonna sound like **** w/ out a muffler...just buy a magnaflow and be happy
Mufflers are not part of the emission system,not in any of the 50 states does it require a muffler to pass the actual sniffer test.


Noise laws are where mufflers are required and some states have stricter noise laws then others.
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Unread 05-31-2014, 07:21 PM   #6
02blue
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Quote:
Originally Posted by tjkj2002 View Post
Mufflers are not part of the emission system,not in any of the 50 states does it require a muffler to pass the actual sniffer test.


Noise laws are where mufflers are required and some states have stricter noise laws then others.
Don't know where the OP is from, no profile info, but Maryland is pretty strict on the noise thing in the more urban areas. I'm out in the sticks but travel into the mess for work so have to tread lightly even with my Borla. They (VEIP) do visually inspect for intact exhaust but only plug in for emissions on newer OBDII vehicles. Everytime I go in they tell me I have a hole in my muffler but I tell them it's supposed to be like that.
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Unread 06-01-2014, 09:47 PM   #7
gombie72
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Quote:
Originally Posted by 02blue
Don't know where the OP is from, no profile info, but Maryland is pretty strict on the noise thing in the more urban areas. I'm out in the sticks but travel into the mess for work so have to tread lightly even with my Borla. They (VEIP) do visually inspect for intact exhaust but only plug in for emissions on newer OBDII vehicles. Everytime I go in they tell me I have a hole in my muffler but I tell them it's supposed to be like that.
Sorry for the late reply. I recognize all of these things. My friend has 2 flowmasters he had hooked up to his charger srt8 that he is willing to sell one of. I am currently located in Charlotte North Carolina. And at high RPMs I know it sounds anything but good. But seeing I am in a highly crowded city, it is mostly at low revs where it sounds allright. I have knowlege of the back pressure 'issue', and I am really not trying to sound like a jerk, or rude or anything, but the back pressure created by the muffler is not really necessary, nor does ot hurt much over a small period of time. Plus the jeep is 12 years old and hasnt had a problem for over 30,000 miles 'knock on wood'. Although I am chasing down the 200k mile marker right now.
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Unread 06-02-2014, 05:50 AM   #8
tommudd
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Don't know why you asked a question since you already know what you want to do
Not being a jerk either , just stating facts
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Unread 06-02-2014, 10:00 PM   #9
olliehopnoodle
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I am totally confused. You want info on removing the muffler but you have a muffler you want to use? From my personal experience running open pipes for short periods of time the sound level is fine at a constant RPM or slowing down. It is accelerating that causes all of the noise and this is regardless of speed. If you are in a crowded city and having to drive in stop and go traffic the lack of a muffler is going to be undesirable on many levels.

I should qualify that the cars I drove without a muffler (usually to the muffler shop) did not have a cat converter so I don't know how much that cuts down on the noise itself.

Come to think of it, why didn't someone combine the two?
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Unread 06-02-2014, 10:57 PM   #10
tjkj2002
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Quote:
Originally Posted by olliehopnoodle View Post

Come to think of it, why didn't someone combine the two?
Most mufflers are filled with glass fibers for sound deadening and cats can reach temps well over 1200 degrees so not a good combo.Plus there is a size issue to reach the required sound level for local laws.
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Unread 06-03-2014, 07:59 AM   #11
olliehopnoodle
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Quote:
Originally Posted by tjkj2002 View Post
Most mufflers are filled with glass fibers for sound deadening and cats can reach temps well over 1200 degrees so not a good combo.Plus there is a size issue to reach the required sound level for local laws.
Makes sense. I had not thought of that. Certainly if they could be combined some car company would have done it by now. (save money and weight). Oh well, another idea I won't get rich off of....
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Unread 06-04-2014, 02:13 PM   #12
remmons
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There have been so many kids who I have known over the years who have removed their mufflers thinking that it sounded "cool!" and thought that this made their vehicles go faster. I love the looks on their faces when I race them in my '68 Chevy C10 with dual Thrush Turbos when I leave them sitting at the starting line.

My step-son was going to remove his muffler to get the loud noise, but I had talked him out of it. He was butt-hurt for a while, that was until one of his friends had removed his muffler from his XJ and hated how loud and annoying that it was when they drove to the hills.

Stick with a muffler, but go with something good. You'll appreciate this in the end.
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Unread 06-07-2014, 08:41 AM   #13
gombie72
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Okay, so my real question is, should I just extend the pipe out from the cab, should I buy the new muffler, or should I put the old back on?
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