3" quiet true duals
01-02-2019, 09:26 AM
#13
100% Redneck
In for results, I'm looking into building a custom system to keep mine toned down so it's not so obvious. Been talking to a guy I know that can do stainless mandrel system with resonators, cats and mufflers. He just did my buddies and it was reasonable for what he got...
01-03-2019, 05:40 AM
#14
TECH Fanatic
He is using prefab, takes measurements and orders accordingly. His stuff looks so good it's ashame you can't see it.
01-04-2019, 03:16 PM
#15
TECH Apprentice
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I had a Flo~Pro 2510 on my '10 2500HD, had just a slight amount of noise @ 67mph, nothing unbearable, and my ears are very sensitive to drone. Dual 3" is overkill in my opinion for anything N/A driven on the street, you wouldn't be sacrificing anything with dual 2.5" and you could control the sound better. Put on the largest case mufflers of your flavor, and if you still have drone...add in some J-pipes/Helmholtz resonators before the mufflers. I had a 2013 FX2 5.0L Coyote powered F150 that I had the 5x11x22 Magnaflow and a J-pipe and it was finally bearable. I run the biggest case Dynomax Ultraflow (24") muffler on my wife's Suburban with an SLP resonator delete, very good sound.
On my last K5 I tried a Magnaflow 5x8x24 with a single 3" tailpipe and a high flow cat. I figured with the large case size it would be tame...wrong, droned terrible at highway speed. Put a Walker Quiet-Flow SS muffler on it and all was right with the world again.
Luckily my Vortec Max Sierra came with a previously installed Corsa system.
On my last K5 I tried a Magnaflow 5x8x24 with a single 3" tailpipe and a high flow cat. I figured with the large case size it would be tame...wrong, droned terrible at highway speed. Put a Walker Quiet-Flow SS muffler on it and all was right with the world again.
Luckily my Vortec Max Sierra came with a previously installed Corsa system.
01-04-2019, 03:27 PM
#16
Your description sounds a lot better than mine is and I ordered the 2500 so it should be slightly quieter. I should have gone with dual 3" in dual 2.5" out because it would automatically be quieter and there seem to be more muffler options for that. It's tricky getting two 3" tailpipes over all the suspension in the SUVs and the muffler guy did a good job stuffing it in there so I'm not going to try to get him to change it more than he has to to get the new muffler on. I should be getting it on Monday so I'll get the truck to the shop to have the little cats installed and the muffler swapped. I'll post results since there has been so much interest.
01-09-2019, 12:25 AM
#18
100% Redneck
Here is how I did mine It is very mellow with no drone at all.
https://www.performancetrucks.net/fo...member-549690/
https://www.performancetrucks.net/fo...member-549690/
01-09-2019, 11:22 AM
#19
So, the exhaust shop just called me. THey say the 2500 model has 2 pipes coming out but one of them is basically a built in J-tube. No exhaust will be coming out of it. I may not have them install it. They're putting the cats on so I'll go see how it sounds with that before I make a decision. We're also discussing makingJ-Tubes for after the magnaflows that re on there now.
01-10-2019, 09:03 PM
#20
if its still to loud install some resonators, i had a ls1 z28 with LT's, X & magnaflow drone was horrible my cousin had 2 resonators off his 5.0 stang i took and installed them it really tamed the exhaust down was still a little drone but with the radio on low (just enough to make noise) didnt hear it