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Old 08-12-2018, 10:15 AM   #1
bhplumber
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Join Date: Mar 2017
Posts: 40
Default Supernova muffler install

So I finally committed to installing the new Magnaflow quiet series 4 inch flow thru muffler.
List of parts needed
Muffler ( I choose the Magnaflow , I didn't want it loud)
3 - 4 inch lap joint SS clamps
1 - 3.5 inch lap joint clamp
1 - 4 to 3.5 inch reducer
1 - 4 inch cat delete pipe for a 98 Dodge Cummings
1 - 6 inch long piece if 1/8" x 1.5" flat galv. steel
Tools needed:
Sawzall with 7" long bimetal blade
15 mm deep socket and ratchet
Flat and round file to clean up cuts
I measured everything ten times then was confident it would work so I cut the old muffler out leaving enough pipe on each end just incase I would ever want to reinstall it. Then a couple trial fits and trims and it all came together. I used the galv. steel as a hanger for the muffler. I drilled a hole in each end so it could attach to the clamp on the front of the muffler then I attached it to the factory hanger. Now that I know it works and what to get I would say it can be done in about 1.5 hours by yourself.
The doesn't seem any louder at idle or rpm when reving it up in the garage. I have not had a chance to test run it on the road yet for performance. If nothing else I'm just happy helping the engine breath better. I'll see how it does next week on our trip.
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Old 08-12-2018, 10:22 AM   #2
bhplumber
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I forgot to mention I cut both expanded ends off the cat delete pipe so the one end went into the muffler and the other end in the 4 to 3.5" reducer.
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