how loud will it be
Thread Starter
TECH Fanatic
Joined: Oct 2002
Posts: 1,068
Likes: 0
From: Seattle,Wa.
how loud will it be I currently have stock exhaust with SLP Lounmouth.
I'm going with mid length Mac Headers soon.How loud will my T/A be with Mac mid length headers w/Loudmouth.Will it be louder inside the car or just outside.Will it help with the drone I get at 1800-2000 RPMS.
Opinions please.
I'm going with mid length Mac Headers soon.How loud will my T/A be with Mac mid length headers w/Loudmouth.Will it be louder inside the car or just outside.Will it help with the drone I get at 1800-2000 RPMS.
Opinions please.
It will be loud as hell, it's basically open headers. Think about getting a muffler and catted Y.
Cats help bring down the overall volume a lot, and so does the right muffler.
My setup is Macs through a catted 3" Y (CarSound cats) into a factory muffler. I have a 3" electric cutout in the Ypipe to open the exhaust up.
With the factory manifolds and Y (which I have back on now temporarily) it's a LOT quieter even with the cutout open. It probably reduced the overall loudness by about 30% (and the performance along with it, heh).
My setup is very tolerable even on highway trips when the cutout is closed.
Bad30th
Cats help bring down the overall volume a lot, and so does the right muffler.
My setup is Macs through a catted 3" Y (CarSound cats) into a factory muffler. I have a 3" electric cutout in the Ypipe to open the exhaust up.
With the factory manifolds and Y (which I have back on now temporarily) it's a LOT quieter even with the cutout open. It probably reduced the overall loudness by about 30% (and the performance along with it, heh).
My setup is very tolerable even on highway trips when the cutout is closed.
Bad30th
Thread Starter
TECH Fanatic
Joined: Oct 2002
Posts: 1,068
Likes: 0
From: Seattle,Wa.
The Y pipe and cats come with the headers as a set,so I will be running cats.Even with cats will it be intolerable.I may have to get a Dynomax or another type of muffler before the install.
I don't care if it's loud outside the car because I race old school cars that are running flowmasters and my LS1 sounds wimpy next to them.I am concerned about the noise level inside the car.
How will it sound through the cats?
I don't care if it's loud outside the car because I race old school cars that are running flowmasters and my LS1 sounds wimpy next to them.I am concerned about the noise level inside the car.
How will it sound through the cats?
It won't be intolerable with the cats. It will however be lots louder than your current stock exhaust.
Try it out with the Loudmouth and see if it's too loud for your taste.
If it gets on your nerves after a while (it probably won't at first, you'll have an ear-to-ear grin for a while) then think about a Dynomax.
Edit - the Mac cats suck, they flow worse than the stock cats. Ditch them asap and get some CarSound 3" cats. You will still get a big improvement over stock with their headers/cattedY but their cats are a restriction. Do a search for catalytic converter flow rates in the External Engine section.
Good luck !
Bad30th
Try it out with the Loudmouth and see if it's too loud for your taste.
If it gets on your nerves after a while (it probably won't at first, you'll have an ear-to-ear grin for a while) then think about a Dynomax.
Edit - the Mac cats suck, they flow worse than the stock cats. Ditch them asap and get some CarSound 3" cats. You will still get a big improvement over stock with their headers/cattedY but their cats are a restriction. Do a search for catalytic converter flow rates in the External Engine section.
Good luck !
Bad30th
On The Tree
Joined: Feb 2003
Posts: 194
Likes: 0
From: Birmingham, AL
I have the exact setup you are talking about except without cats. The MAC cats suck. My exhaust is EXTREMELY loud. If you're behind the car when i rev it, it will hurt your ears- no joke (like serious pain). The drone decreased somewhat although i didn't think the drone was that bad to begin with. To make a comparison, my exhaust is pretty much the same as a cutout (with headers and no cats), just not as deep with more tone.
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Im about to install my slp longtubes with a random tech y pipe w/high flow cats. currently i wacked of my exhaust from the cat back and threw on a 3" inch pipe that goes into 3" chrome tips, r after the header install w/ypipe can i expect it to scream obnoxiously?