03 Exhaust(stock Muffler)

[TheWolf]

WHAT SIZE IS THE PIPE GOING IN AND OUT OF MUFFLER? IS IT 4" I. D. /O. D. ON BOTH OR NOT?

 

[smithinc]

I believe it is 3. 5 in and 4 out.



gary

 

[Fireman]

3 1/2" in and 3 1/2" out



Fireman

 

[smithinc]

now that you mention it i do believe mine was necked down from 4" to 3. 5" going into the back side of the muffler, making the muffler 3. 5 on both sides. I dont have mine anymore so I cant confirm. Would it matter when they were made? mine was built in July of '03



gary

 

[JHardwick]

Gut it!

 

[JSoden]

Gut it?

Hey JHardwick, I went to your profile. I am curious about what you did to gut your muffler. How does it sound?? Any performance difference?

 

[nickleinonen]

Originally posted by JHardwick

Gut it!

i plan on doing something similar to mine when i do get it... was the muffler chambered or was there 2 perforated pipes in there sitting next to each other?



[i want to cut the one side open and perform "open muffler bypass surgery" :-laf with a piece of flex pipe in there then weld it back up. then it'll be straight pipe in a muffler shell]

 

[JHardwick]

I started by cutting thru the shell as close as possible to the end plate on a horizontal band saw ( a sawzall would work too).



Once inside, there are 3 (maybe four, I can't remember) plates equally spaced and welded to the shell.



These plates hold the tubes making up a 4 pass system. Torch the plates as close to the shell as you can without burning thru the shell. The deeper you get the harder it is to position the torch, and the longer you have to wait for it to cool or risk a serious burn (welders gloves and sleeves would help here).



Once everything is removed, weld the end plate back on!



I can't speak of performance gains because I did this before the gages, but I really like the way it sounds, and it eliminated the 2100 RPM drone.



I gives plenty of turbo noise and has a deep chambered sound throughout the RPM band.



RBattelle will be able to hear it Thursday, we'll see what he has to say

 

[nickleinonen]

Originally posted by JHardwick

I started by cutting thru the shell as close as possible to the end plate on a horizontal band saw ( a sawzall would work too).



Once inside, there are 3 (maybe four, I can't remember) plates equally spaced and welded to the shell.



These plates hold the tubes making up a 4 pass system. Torch the plates as close to the shell as you can without burning thru the shell. The deeper you get the harder it is to position the torch, and the longer you have to wait for it to cool or risk a serious burn (welders gloves and sleeves would help here).



Once everything is removed, weld the end plate back on!



I can't speak of performance gains because I did this before the gages, but I really like the way it sounds, and it eliminated the 2100 RPM drone.



I gives plenty of turbo noise and has a deep chambered sound throughout the RPM band.



RBattelle will be able to hear it Thursday, we'll see what he has to say

hmm... sounds like a little more work than i want to do then [ i don't have cutting torches at home anymore ] i may just find a 3. 5" offset straight through design muffler to stick in there until i fork out the coin for a 5" system [or just get some 3. 5" flex & some band clamps]

 

[TheWolf]

if it is only 3 1/2"... ... then where is the 4" exhaust at that it was supposed to have? Just over the axle and tailpipe?





thanks

 

[Ladders]

TheWolf,

yes, the only place its 4" is after the muff. The turbo down pipe (on mine) will be replaced with a 4" tomorrow and it looks like we can cut the 3. 5" off and just weld the 4" in place. Have 4" now from the muff (under the rear seat area) back and needed "permission" to get the front done due to funds. We gonna "piece" the pipe together so there will be no restrictions (other than the welds).



The muffler is an FLO-PRO 6192 8"round x 24"long, over all length is 30". Has a nice smooth sound and is not as "obnoxious" as the y2k was with a straight pipe (per the SO). Is noisy enuff for her but I want more of the "set off alarms" sound. Will just have to wait a few years more for it.



SOTSU!!

\\BF//



EDIT: did the muff this way for the stack I hope to have in the future. Wont have to relocate it later. AND we are putting a 3. 5" cutout in front of the muff tomorrow (for those time we NEED to MAKE noise!!!).

 

[JHardwick]

so RBattelle ???

How did the hollow shell sound ... ... ... ... if I had room I could have got a chirp out of 4th too



I like the way it sounds, it is quiet in the cab and has no drone ... ... ... ..... plus it only cost me some time