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Dynomax Mufflers and Magnaflow X pipe

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Regular Member
Posts: 49
Joined: Sun Dec 09, 2018 8:21 am
Vehicle: 2014 PI AWD 3.5l Twin Turbo

Dynomax Mufflers and Magnaflow X pipe

Post by PFFCO » Sat Apr 06, 2019 6:32 pm

I decided to try out the Dynomax axle back mufflers today and a Magnaflow X pipe on my 2014 PI.

http://www.dynomax.com/dual-2-25-axle-b ... flers.html

Installation went well, pretty easy, cut off the old ones after you measure twice and cut once...
My friends shop did the work. We pulled the 3rd cat out and inserted the X pipe. I had to run to a job that was about 100 miles away, so I took the car.

I can't say that I'm happy. There is this low end rumble in the 30-50mph range, and at speed, it's pretty loud, like my SRT8 with flowmaster 40s on it.
I was hoping I would like it, but I felt out of place driving the car, with the sound coming out of it. I pulled into the driveway tonight and my wife who also drives the car, bitched at me...

So now, I'm looking for a slightly quieter muffler for the car. Any suggestions?

short video https://www.dropbox.com/s/af7k75kt61bwe ... C.MOV?dl=0
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