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Magnaflow for 6.0L

clm7214

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clm7214 Enthusiast

clm7214

Posted
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Ive found that Flowmaster doesnt make a dual 3in in/out. I couldnt live with myself if i had a dual 3inch in and dual 2.5 out. That just bugs me. I did however find that Magnaflow and Dynomax make dual 3in in/out mufflers. I plan on replacing it and bending up some 3in pipes to exit out the sides. Does anyone have experience with either of these mufflers? How is the sound? Im looking for a really aggressive sound. Im not trying to start another exhaust brand name war, just looking for opinions from people who have these. Thanks.

 

 

 

Edited to add in the Dynomax that i just found.

soccermom Enthusiast

soccermom

Posted
Posted

I had a magnaflow #12599 on my truck for a few months. Sounded mean on acceleration, was silent at cruise but the deal killer was evil resonation b/t 1500-1900rpm. It gave me headaches.

 

I drove a 1500hd with the same muffler but with 3.73 gears (vs my 4.10) and it didn't resonate as badly.

 

The Flo-pro I have now sounds great, is quiet at cruise and only has minor resonance at the same rpms that caused the magnaflow to drive me nuts.

clm7214 Enthusiast

clm7214

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Well i replaced the factory muffler with the Dynomax. It sounds great. Very deep sound when you get on it, but still quiet enough at 50mph and up. There is some resonance at around 40mph, but how often do you cruise at that speed. Very aggressive sounding exhaust. The DIC is showing higher MPG numbers than i have seen before. I'll run a tank through it before i post any numbers though.

 

I tried driving it around with no tailpipe and just muffler. OMG it was loud, instant headache. I modified the factory dual 3in to 3.5 in tailpipe to fit the new muffler and it works great. It maintains enough backpressure to keep the torque but sounds great.

 

Also, when i took off the factory muffler, the right side inlet weld was cracked in half all the way around.

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