replacing muffler
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Junior User
Joined: Oct 2006
Posts: 56
Likes: 0
replacing muffler
i was wondering if just replacing the stock muffler on my 2004 screw with 5.4 with a sido magnaflow muffler would impove the power and mileage just a little and give a decent sound, don't really want it loud in the cab,any help would be appreciated thanx
Fleet Mechanic
Joined: Mar 2005
Posts: 1,462
Likes: 185
From: Dedham, MA
It would depend on the diameter of the pipe coming from the muffler and the types of bends. I think the aftermarket systems are 3" pipes all the way through (I could be wrong, maybe 2.5" - either way they are larger diameter than stock). So from cat back, you get larger piping into a better muffler, with larger piping out the rear, mandrel bent (no kinks - smoother airflow). The option you mentioned is probably cheaper and will probably give you some improvement, but maybe not as much as a true aftermarket cat-back system.
Posting Guru
Joined: Sep 2002
Posts: 1,264
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From: North Carolina
My SIDO system was custom built at my local shop. It is a 3"inlet with 2 2 1/2" out. All the pipes are mandrel bent and hung in factory locations, The entire system is welded instead of clamps. There is a big difference in performance and sound. I went with a Flowmaster 50 series. It is quiet in the cab but has a nice mellow rumble at idle. Any competent shop should be able to build you a system like this for about $200 less than a bolt on system ordered from a company. I believe there are pics in my gallery but if there isn't E-mail me and I'll send you some. This is the second truck I have had the shop do for me. They are fantastic and they can do anything I want them to do. Custom tips, custom exit locations, SS, aluminum, steel, whatever I want. All my Exhaust work is done there. Total price on my system was about $280. I didn't have to crawl under my truck and I know it was done right. All I had to do was stand there and watch them. There are pics of the other system in my gallery also.
Tuned
Joined: Jan 2005
Posts: 314
Likes: 16
From: northeast
I had my stock muffler cut off and a magnaflow welded in. I bought a SS 18" PN 14263 for 70.00 and 70.00 for local shop to weld in. Performance gains, not sure if there were any, but sound is great. A nice rumble when you start it, mellow around town, and a nice bark when you step on it. BWEP
Junior User
Joined: Dec 2006
Posts: 57
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Hi Bryan,
Do you get a drone in the can at highway speeds with the 50 series? I've got 40's on my 97 Cobra. When I had the tailpipes on I hardly noticed them, with dumps and at 2000 rpm I sooner not be in the car.
Stephen
Do you get a drone in the can at highway speeds with the 50 series? I've got 40's on my 97 Cobra. When I had the tailpipes on I hardly noticed them, with dumps and at 2000 rpm I sooner not be in the car.
Stephen
New User
Joined: Sep 2006
Posts: 23
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From: South Florida
I just got the Summitracing exhaust installed and am very pleased with it here is a link
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
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Elder User
Joined: Mar 2003
Posts: 567
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From: Mandeville, La
Originally Posted by badloser
I just got the Summitracing exhaust installed and am very pleased with it here is a link
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
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Posting Guru
Joined: Sep 2002
Posts: 1,264
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From: North Carolina
I had 40's on my Expedition. I know what you mean by drone at 2000 RPM's! You didn't even want to be in the truck! With the 50 I get no drone at all! I tow often and the RPM stays right at 2000-2300. I am very satisfied with the setup. You can hear it in the cab when you get on it, but at highway speed it is gone!
Fleet Mechanic
Joined: Mar 2005
Posts: 1,462
Likes: 185
From: Dedham, MA
Buddy of mine as 40 series on his Silverado, and can't stand the drone around town. Not bad on the highway.
As far as cost goes, I just checked the price on my Bassani stainless steel SISO exhaust, up to $671 now. I love the way it sounds and it went together real well, but I would be forced to consider the option you guys talk about now. Only I have to find a shop I trust...
As far as cost goes, I just checked the price on my Bassani stainless steel SISO exhaust, up to $671 now. I love the way it sounds and it went together real well, but I would be forced to consider the option you guys talk about now. Only I have to find a shop I trust...
