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Anyone do a 3" y to flowmaster merge and single 4" out dumped?

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Old 03-07-2014, 02:24 PM
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Originally Posted by BlackDuk98
Everything I used to build this to also flow through the magnaflow catback when I needed it to be quieter. I don't have all the part numbers, but you get the idea.

I purchased a generic Summit u-bend and used that to cut exact angles to turn from the y pipe to the flowmaster merge: sum-622004

sum-g2990 (o2 bung)
flo-y300400 (merge)
wlk-41989 (reducer into catback)
wlk-33274 (stainless slip fit clamps)
wlk-24217 (4" bullet)
wlk-41367 (turndown)
sum-622004 (pipe to custom cut to tie into merge)
qtp 4" stainless cutout pipe
qtp 4" electric cutout

Very useful contribution! You just everyone a bunch of time and frustration.
Old 03-07-2014, 02:40 PM
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Yes, thank you very much for taking the time to list the parts!
Old 03-07-2014, 06:01 PM
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no problem. I may have more pics somewhere, but no sound clips. I did run it with and without the 4" muffler, and is definitely worth adding that muffler to clear up the rasp. Even though you can stick your arm through it, it works.

The sound is extremely deep and absolutely wicked. This is my final exhaust, but one day may make it entirely out of stainless. Only clip I have is the cutout closed through the Magnaflow exhaust on the dyno
Old 03-08-2014, 02:58 PM
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here is a sound clip of my old Camaro with the ls swap and a 3'' Y to 4'' Flowmaster merge and a dynomax bullet race muffler. 12'' case w/ a turndown. Loud as hell but sounded good.



Old 03-08-2014, 04:06 PM
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FYI If you want to do something a little different than a regular dump tip, then get a U or J bend and do something like this.

Old 03-08-2014, 09:04 PM
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99Bluz28, I really like the smoothness of that exhaust. Looks great
Old 06-15-2014, 12:17 AM
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Nice.
Old 06-15-2014, 04:07 PM
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Long tube headers an slp loudmouth 1 power gains vs dumped y-pipe ?
Old 03-09-2015, 07:07 PM
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Here are two pictures of what I'm working on. I am using the Flowhamster 3" dual to 4" outlet merge with pipe from Columbia River Mandrel bends. It's not dumped. I used a 4" to 3.5" Transition to make it mate up to my modded OBX SS cat-back.
Maybe this is not a good contribution to the thread because the car is not a F-Body but I hope my results come close to what others in this thread got. I'm looking for someone in my town to weld my 10 seams and then I plan to paint. I'm not sure what paint I will use; the local Advance store has VHT flameproof or I might cheap out and get BBQ black. Cost is always a problem for me.
Attached Thumbnails Anyone do a 3" y to flowmaster merge and single 4" out dumped?-flowmaster.jpg   Anyone do a 3" y to flowmaster merge and single 4" out dumped?-fmy.jpg  
Old 03-10-2015, 11:26 AM
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It's still looks similar to a F-body Y an I pipe setup, so it fits in with the thread.
Yeah, VHT Flameproof is your best bet. Just make sure to follow the directions.
Old 03-11-2015, 01:01 AM
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I wanted to do the 4" single but I was convinced by some friends to go with a 3.5" instead. It would definitely be nice if your set up is Forced Induction.
Old 03-11-2015, 08:15 PM
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I'm running the 3" into 4" Flowmaster merge and 4" QTP Cutout.

I previously had the same combo with a 3" cutout, which I thought sounded better. The 4" is noticeably more "bass" in tone.

Old 11-05-2015, 10:06 AM
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I've wanted to do this for the last couple years, anyone see any gains from the better merge?
Old 11-05-2015, 10:38 AM
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Originally Posted by nocooler
I've wanted to do this for the last couple years, anyone see any gains from the better merge?
Like I mentioned earlier in this thread I most definitely experienced a gain with the FM merge
Old 11-05-2015, 11:27 PM
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not sure what just a merge would gain you, but when running mine through the Magnaflow catback, and then opening the 4" cutout to runt through the 4" side of my exhaust, on the dyno in a 98* day the car picked up 14 rwhp and 15 rwtq.
Old 11-11-2015, 08:17 PM
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Mine is semi-dumped...
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Old 11-11-2015, 08:31 PM
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Originally Posted by HeavyMetl
I'm running the 3" into 4" Flowmaster merge and 4" QTP Cutout.

I previously had the same combo with a 3" cutout, which I thought sounded better. The 4" is noticeably more "bass" in tone.

1984 Camaro Kil-Kare 7/24/14 - YouTube
In your opinion what made the 3" cutout sound better than the 4"?
Old 07-01-2017, 07:24 AM
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Digging up an old thread,...could any of you guys re-post some of the pictures that are missing? I'm doing a LS conversion in an LT Camaro and have to modify my crossmember for the trans mount and would like to see the routing on some of these merges being used. I have the short tunnel mounted torque arm.

Thanks
Old 07-01-2017, 07:55 AM
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If you want a deeper rumble, go with a 4"

Photobucket is being a piece of **** to everyone and pulling everyone's pics, I will see what I can dig up tonight and go around the bucket
Old 07-01-2017, 08:47 AM
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Alright man, thanks!


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