replacement muffler [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: replacement muffler


bigtree_nc
10-04-2004, 09:37 AM
What is a good muffler to replace the stock one.I want to leave the exhaust just replace the muffler for better flow and a little better sound.Thanks

RickDLance
10-04-2004, 08:18 PM
I took my muffler off completely and it did not make that much differance. Put the muffler back on and removed cat, and it sounds a bunch better.

bigtree_nc
10-04-2004, 09:42 PM
Here in NC we cant get thru inspections without the cat.We can but if you get caught its a big fine.Any ideas.

briano
10-05-2004, 05:15 PM
has anyone replaced just the muffler?? I am also interested in this as well since here in Texas emissions is getting very strict.

Idle_Chatter
10-05-2004, 06:35 PM
I replaced my OEM muffler with a 4" flow-through Magnaflow. There've been several previous threads on this issue, so I saved a text file to reduce "retyping":http://www.dieselplace.com/forum/smileys/smiley1.gif


http://forum.thedieselpage.com/cgi-bin/ultimatebb.cgi?ubb=ge (http://forum.thedieselpage.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=3;t=005556) t_topic;f=3;t=005556


http://forum.thedieselpage.com/ubb/ultimatebb.php?ubb=get_to (http://forum.thedieselpage.com/ubb/ultimatebb.php?ubb=get_topic;f=3;t=004826#000000) pic;f=3;t=004826#000000


I bought mine on the internet from www.henschelandsons.com (http://www.henschelandsons.com) in Connellsville,PA. The muffler was the Magnaflow 14771 - $149.42, the adapters were 15441 - $22.33 each. I bought 4" band clamps from a local International truck parts supplier. The job wasn't so tough, I did it in my driveway without even jacking the truck. I cut the stock muffler outlet pipe as close to the muffler as possible with a chain cutter. This allowed me to get the muffler and inlet pipe out, as well as the tailpipe. I then cut off the stock inlet as close to the muffler as possible. This left "stubs" of stock pipe inside the factory hangers. A trial fit of the muffler and clamps indicated that the adapter/muffler combo was a bit too long for the gap vacated by the stock muffler, so I trimmed about 1" off the Magnaflow inlet and outlet and the same off the 3-1/2" sections of the adapters. The stubs were also oval due to both of them being in bends in the factory install. I rounded them back out for a better fit to the adapters with a 3-1/2" pipe expander tool. I then clamped the adapters to the Magnaflow and fit the three pieces back up under the truck. When I got it where I wanted it - in the factory hangers and the tip of the tailpipe supported on a floor jack, I tack welded the 3-1/2" end of the adapters to the stock pipes. Then I released the band clamps, brought out the three pieces, full welded the adapters to the pipes and put everything back. Whole job took about 4 hours.

baimpala
10-05-2004, 06:51 PM
I really think you'd be surprised how quiet it is with just a straight pipe from the Catalytic Converter back. If you replace the muffler with a straight pipe and you think it is too loud, you're only out a few bucks at most. If you buy a replacement muffler, you're going to wonder why you wasted so much money if you want a better sound.


TRUST ME.


Dennis