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View Poll Results: Where is the best place to locate the muffler
At original location in the back 4 80.00%
Under the body 1 20.00%
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Old 06-17-2010, 06:46 AM   #1
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Question Debate:Pros & Cons of relocating the muffler

OK, I'm getting ready to order my new muffler that my local shop will weld on for me. But I have 2 questions I hope someone out there can answer:

1) Where is the best place to have the muffler located, at the original stock position or under the body? I would think both locations stand the risk of being damaged, depending on the type of terrain. Is one really safer than the other?

2) What is the maximum size muffler that will fit under the body and would I go with a centered in/out or offset on one or the other for the best fit?

The muffler I'm looking at is a Borla ProXS and it's 14" long, 9.5" wide, and 4" thick. It comes in a variety of in/out locations (offset or centered). This is only 1" longer than the Flowmaster 40 series muffler I hear a lot of people running under the body so I'm hopeful it will also fit there, provided that is actually the best location.

Let's start the debate.

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Old 06-17-2010, 07:57 AM   #2
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Not much to debate about, the best idea is just removing the HUGE stock muffler and installing a much smaller type and that depends on your ear for sounds

Some people don't like the louder Flowmaster 40, but, I do

Just in front of the evap can, one of the few spots and the pipes 'NEED " to be welded-no clamps and well hung (), for vibrations





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Old 06-17-2010, 08:28 AM   #3
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Quote:
Originally Posted by JIMBOX View Post
Not much to debate about, the best idea is just removing the HUGE stock muffler and installing a much smaller type and that depends on your ear for sounds

Some people don't like the louder Flowmaster 40, but, I do

Just in front of the evap can, one of the few spots and the pipes 'NEED " to be welded-no clamps and well hung (), for vibrations





JIMBO
I notice you have a skid plate over your evap can but not the muffler. Isn't the muffler in danger as much as the can when installed there? Also, do you think there is more noise from the muffler when mounted right under your seat?
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Old 06-17-2010, 08:36 AM   #4
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Heh Heh, the evap can plate is to keep the ECM from sending codes, if the can is damaged and they cost a bunch


Quote:
Originally Posted by DGriz View Post
I notice you have a skid plate over your evap can but not the muffler. Isn't the muffler in danger as much as the can when installed there? Also, do you think there is more noise from the muffler when mounted right under your seat?
I don't care if the muffler is dented, won't hurtit !!

No, no sound difference, it comes out the BACK !!

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Old 06-17-2010, 07:08 PM   #5
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Originally Posted by JIMBOX View Post

No, no sound difference, it comes out the BACK !!

JIMBO
Ha ha. Yeah I know where the sound goes but there has to be at least a little sound that escapes through the metal walls, isn't there? Maybe not on a muffler with packing material as much as the Flowmaster with bevels.

Anyway, I talked with the shop and it sounds like the Borla will fit nicely up under the cab similar to JIMBO's but I'll only be going with the single outlet. The way it appears to lay out, my best fit will be to have the offset intake and centered outlet so the existing pipes line up (or at least pretty close).

JIMBO, it looks like you have center in and then dual out. The Borla I'm using is the same width as your Flowmaster so I'm wonder if the stock pipe from the Cat lined up on yours or if you had to have a bend in it. I'll get under there and do some measuring tonight but I'd be interested to hear more about yours. Thanks.
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Old 06-17-2010, 07:32 PM   #6
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You better look at yours, but I think mine went right into the ctr of the Flowmaster

As far as sound, my interior is extremely insulated top/sides/floor, so there's almost no exterior sounds "sneak" in with the windows closed !!

I had to make sure I could survive the Nevada Desert heat/cold

I don't know the BORLA setup !

Good luck

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Old 06-18-2010, 09:17 AM   #7
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40 series Flow Master here...it looks like its half the size of the stock muffler...tucks in very nice and sounds great. Got it installed for $175.

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