Magnaflow Muffler

[JTeague]

Hi guys.



After being totally disapointed with the straightpipe I installed on my truck, I think I found the sound I was looking for. I quickly ordered up a Magnaflow muff p/n 12772 and put on. Much Better. No more crappy ricer sound. Its a little on the quiet side but thats o. k. by me. Its got a nice deep tone now without drone. All It needs now is little more fuel.

 

[Ladders]

Will this part # replace the stock, size for size (length more than dia)?



\\BF//

 

[krabman]

I was talking about these with Rip and he was saying that in a couple years the magnaflows would be noticeably louder due to some of the packing deteriorating and the rest sooting up. His summation was good muffler, comparatively expensive, poor longevity. Getting my new exhaust installed on the 23rd. Mine will be resonator and muffler. I like quiet though so I may have him pull the resonater and drop in another muffler dependiing on how things sound after the muffler/resonator install. Im going to use the spl meter I got for my home theater to take some objective measurments before and after. If anyones interested I'll post numbers.

 

[lawdog]

Defiantly would be interested in sound numbers. . I like the sound of my 2000 around town with the 4" but the drone gets old FAST on long trips. . Can't wait to sell and save to order my 04

 

[JTeague]

Ben, I had to use an adapter from 3 1/2 id to 4 in i. d. adapter and a short (aprox 8 in. ) piece of 4 in. pipe to make the muffler fit. But this was after I had installed the straightpipe first. I also cut off the 3 1/2 in. portion of the tailpipe to make the muffler fit without an adapter on the rear of the muffler. Then I fabbed up some hangers out of 1/4 in. steel rod , welded them to the muff and hooked them in the factory rubber isolators. As for those worried about extreme noise while towing, this muffler will fit the bill nicely on extended trips.

 

[Mark Craig]

2003 sound and drone etc

JTeague,



We were concerned when the 2003's came out about the sound of the engine with our exhaust systems as well. First we used a straight pipe like you did and weren't happy at all. Then we fabbed up what we hoped would be the system we would use as a prototype and we were pleasantly surprised. The "Diesel" sound was back, the drone was gone and the tone was very muscular etc. Just what we wanted to get. We are using the same muffler we use with all of our systems, the only differences are the hangers and or mounting hooks we weld on the the muffler based on wehter it's going in a Dodge or one of those other brands we won't mention here. We use a ceramic wool blanket and stainless steel wool as packing material so blow out/noise inreases in our muffler will never occur while we are alive anyway. Just thought you guys might be interested in what we found with the new common rail engine.



Mark

Diesel Performance Parts Inc.

 

[Mopar_Mudder]

Mark,



What size pipe are you using on those sytems. Didn't really stick out on your site, I did see one spot that said 4" tail pipe, the stock pipe is 4". Do you have a 5" system.

 

[Mark Craig]

Mopar

Mopar Mudder,



All of our system is 4 inch mandrel bent aluminized or stainless steel depending on the system you choose to purchase. I'm going to step out on a limb here and maybe make some folks upset but here goes. We have dynoed 4 and 5 inch systems and we have seen a loss of performance at the low end of the rpm scale with the 5 inch systems. The appearance is very appealing to some folks but the loss of performance is a negative to us. That's why we have stayed away for the 5 inch diameter tubing. Now the opposite is true as well, if you're running the hottest injectors, propane or nitrous, a performance box etc etc, then a 5 inch will help with the performance at the top end of the scale. Look at some of the 800-1000 inch work horse diesels in day to day commercial use they have a 4-5 inch tubing size, and even the guys that dress them out stay under 6 inches. Now do the math in CFM flow between a 4 inch and a 5 or 6 inch tube based on the CFM output of the engine at wide open throttle, it's just not necessary. Too big a pipe will hurt your performance, it real critical on Ford's, we even offer a 3. 5 inch down pipe as well as a 4 inch for them. The 3. 5 is for stock or real lightly modified trucks while the 4 inch works best for strongly modified trucks.



Our system is 4 inch from the turbo back and is totally mandrel bent, with our Spiral Flow Muffler that helps to evacuate exhaust gasses as they cool down from leaving the turbo. We weld on stainless steel hangers even on our aluminized systems that snap into the factory eurethane body hangers and we include a 5 inch, rolled edge, polished stainless tip with each system. Getting the rest of the factory system replaced even though the tail pipe is 4 inches works together and drops EGT's and ups HP and torque etc.



Hope this answers the question, if not call us we'll be glad to help you.



Mark Craig

Diesel Performance Parts Inc.

 

[Mopar_Mudder]

Thanks for all the info, it is helpful. Exhaust is one of those areas where bigger is not always better that is for sure, run into that with many a gas motor before. Didn't know if the same scavaging effects applied to a diesel or not. I am still up in the air as what I am going to do for sure. I know I will be going to the Edge Comp box or some thing similar, which are all rated in the 140 Hp area by the sounds of it, so I am hoping to get 400 hp to the rear tire. That and a better air box and exhaust to go with it.

 

[Mark Craig]

Mopar

Mopar,



Those three things will really make her a new truck, you'll love it.



Mark

Diesel Performance Parts Inc.

 

[Car_nut57]

We have found an easy and inexpensive way to improve the exhaust and make it 4" most of the way with a 4" straight through muffler. This is done by simply replacing the second intermiate pipe and muffler.



To make this exhaust change the first intermiate pipe is rolled 180 degrees so the bend is up and the second intermiate pipe is replaced with a Ford FDIP98-1 which goes from 3. 5" to 4". The bend of the new pipe is also turned up, this gets the inlet elevation of the muffler to the same elevation as the stock tail pipe so a straight through muffler can be used. Next the stock tail pipe will need to be cut to remove the 3. 5" portion from the stock muffler outlet. Now the stock tail pipe will fit the straight through muffler outlet.



The the sketch in my post on this thread.

https://www.turbodieselregister.com/forums/showthread.php?threadid=71843