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Discussion Starter #1
I have a 2012 Ram 1500 ST rcsb with the 3.7 V6. I am looking to upgrade my exhaust. Not willing to pay for an off the shelf kit, so I will be building it myself with help from a friend. I would like to change the crappy factory y-pipe with the magnaflow version and switch from the anemic sounding muffler. I need to know the following:

1) Cat to y to muffler pipe dimension

2) Muffler input dimension

3) Muffler output dimension

I searched the forums and cannot find a definitive answer to any of the questions for the 3.7 V6. Thanks for any help!
 

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1. 2.0" inlets/2.5" outlet
2. 2.5" inlet
3. 2.5" outlet

Idk if I'm correct or not all I did was go on online and see what size the magnaflows are built to, ill include what links I used

Y-pipe


Exhuast scroll to see all options

you can take some specs from that and build one I would suppose, hope this helps :smileup: and post up a video when you get it lined out, and dont forget to take pics and maybe show us a write up of your custom exhaust I like reading everyone mod stories
 

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Hopefully that helps. I guess since I am going to build it myself, it really doesn't matter too much and I can put in whatever size I want lol. Just want to stay close to factory for size and pick up a little better flow.
 
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