I need my car more quiet, please help!

Hello there, I've done my search and still can't decide. I recently installed Flowtech Longtubes with non-catted 3" ypipe (everything else is stock meaning no cam). On the ipipe I have a chambered muffler (from classicchambered.com) and a electric cutout after it. Below is a picture of what the setup looks like:

http://i44.photobucket.com/albums/f30/scof0elife/2000%20Camaro%20Super%20Sport/cutout_powerstick.jpg

With it open it sounds way too loud for my taste. Now what do you think I can replace the chambered muffler with to make it quiter? I know someone is going to say put in some cats but I'm trying to not go that route. At WOT its just WAY TOO LOUD and too me kind of sounds terrible. I'm sure its commen sense that I'm looking for something that takes out the rasp or atleast somewhat eliminates it since I will be running no cats. Please help, thanks guys

what did you expect with a cutout :shrug:

you will never be able to quite that exhaust with a cutout.. unless you put the cutout after the muffler.. (edit: factory style muffler)

Hahaha. Yeah, a cutout will do that. It's made for times that you are racing. If you don't like how loud the cutout is, all you can do is remove it and get a non-chambered muffler to replace everything. That way you can have a good balance of WOT volume and cruising more quietly.

A nice, inexpensive muffler that flows great would be the Dynomax Ultraflow. It's a non-chambered muffler that would replace your existing cutout and other muffler(s).

Thanks guys but the cutout is after the muffler (after the chambered muffler).

Thanks guys but the cutout is after the muffler (after the chambered muffler).

Chambered mufflers don't do much in the way of "muffling." You're gonna have to go back to a factory style muffler. Or you pick up a Borla catback and put the electric cutout in it. Borla actually becomes very docile when its all being pushed through the muffler, and it makes plenty of noise when you open it up and allow it to flow straight through.

Put a Flo-pro Twister in there. Its the same shape muffler as your chambered stick so it'll fit. I have one in the I of my Borla to kill rasp when open. Its really pretty quiet and sounds nice and smooth. Not bad at all on my daily driver, but I do have cats though.

Put a Flo-pro Twister in there. Its the same shape muffler as your chambered stick so it'll fit. I have one in the I of my Borla to kill rasp when open. Its really pretty quiet and sounds nice and smooth. Not bad at all on my daily driver, but I do have cats though.

Thats the thing, I think its going to be loud regardless if I dont have cats.

What do you guys think how it would sound if I were to weld a catalytic converter in the i pipe. I will be taking out the chambered muffler though and just probably placing the cutout after ther cat. So when open it'll be loud but when close it'll flow through my stock slp muffler. What do you guys think? Do you know anyone thats done it?

Even on non-catted true dual set ups the twisters are noticably quieter than bullet or chambered stick mufflers. Stick mufflers are nothing but noisy glasspacks anyway.

A single cat set up will be costing yourself quite a bit of power.

If you want to check for clearance, Magnaflow makes a pretty thin 3" ID/OD regular sized muffler. IIRC its 3.5 or 4" thick. I've seen them used for duals on 4th gens also. IMO you start doing this you might as well over the axel through the muffler for driving around and just use the cutout for racing purposes.

Thanks for the information. I'm going to look into the twisters especially if they are much quieter then a bullet.

Also, may just have an exhaust shop make me a new 3" ipipe and put an electric cutout in place and just run it through my stock ss muffler or place a magnaflow muffler in place.

The stock SS mufler and I are 2.75".

The stock SS mufler and I are 2.75".

Wait, so the tailpipes to the ipipe are only 2.75 and not 3" inches? If true, will a 3" moroso muffler or any 3" twister work well in the ipipe?

So that's what your exhaust looks like. I was trying to figure out how the hell you put a chambered pipe in there.

Anyway, look at the design of that pipe. Those "chambers" are tiny as hell and aren't doing much. If you want to keep a similar set up look into the borla xr-1s. They are a straight through race muffler that you can get pretty slim. A lot of people use them on true duals. Take a look on www.ls1sounds.com, look up true duals and listen to some of the clips they have of people using xr1s.

I had two on my old camaro with long tubes and an x pipe, no cats. The engine wasn't the hottest thing out there but it put out decent power. Those xr1s quieted the thing down pretty good, and flow nice too. Real clean sound.

A catalytic convertor(s) supposedly cuts down on rasp, but you can't randomly put a cat in your exhaust set up. You would have to get a catted y for your set up. That would place the cats in the optimum place for efficiency.

Thanks for the response man. I was thinking of getting a moroso bullet style muffler for the ipipe in replacement of the powerstick that I have. A member from another forum has one for sale but its a 3.5" inlet/outlet. Will weld fine in the ipipe?

Thanks for the response man. I was thinking of getting a moroso bullet style muffler for the ipipe in replacement of the powerstick that I have. A member from another forum has one for sale but its a 3.5" inlet/outlet. Will weld fine in the ipipe?

Too big a change IMO. That's 3/4 of an inch bigger. Can you imagine the welder trying to make that up? Plus, and this is just guessing on my part, I'm no physics major, wouldn't the change in diameter screw up your backpressure since it has to expand and compress?

BTW, when the hell are you going to let me hear that damn thing?

Too big a change IMO. That's 3/4 of an inch bigger. Can you imagine the welder trying to make that up? Plus, and this is just guessing on my part, I'm no physics major, wouldn't the change in diameter screw up your backpressure since it has to expand and compress?

BTW, when the hell are you going to let me hear that damn thing?

Hmmmm thats a good question about the back pressure. My ory is already 3" so what I was thinking was just weld it to the ypipe and my cutout is already 3" and if anything extra needs to be connected can't I just ask the exhaust shop to add a peice of 3" piping? What would you think if I did it like that man?

As for the sound clip I'm going to try and get it tomorrow. I would like people to hear longtubes with ory with a 3" all the way through chambered muffler.

Also to think of it, I actually dont have a damn ipipe hahaha. the chambered muffler and cutout basically replaced my ipipe. So if I go with the same set up and just place a moroso or some other twister in place it should fit perfectly if anything a little shorter.

Forget about back pressure. Just totally get the concept that it is good or needed out of your mind! Needing it is BS, what you want is velocity.

No, I wouldn't get a 3.5" just because it would look like junk with a 3" outlet from the Y then going into a 3" cutout. And yes, the twisters are most likely shorter than your chambered stick muffler.

Yes, the stock tubing is 2.75" unless you have the optional SLP dual/dual catback.

Forget about back pressure. Just totally get the concept that it is good or needed out of your mind! Needing it is BS, what you want is velocity.

No, I wouldn't get a 3.5" just because it would look like junk with a 3" outlet from the Y then going into a 3" cutout. And yes, the twisters are most likely shorter than your chambered stick muffler.

Yes, the stock tubing is 2.75" unless you have the optional SLP dual/dual catback.

Okay, I guess the 3.5" wont be a good idea. I'm just consider getting it because its only $45 shipped. Thanks for the information on the twisters being shorter. Also I have the optional SLP dual/dual catback. Having that, what does that mean hahaha?

Also I have the optional SLP dual/dual catback. Having that, what does that mean hahaha?

It means you need to sell me your tips!

hahaha, i'm actually thinking of getting new tips and when i do I will let you know bro!

Forget about back pressure. Just totally get the concept that it is good or needed out of your mind! Needing it is BS, what you want is velocity.

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Regardless of whether backpressure is BS or not, wouldn't that big opening in the exhaust, only to have to squeeze back down to finish the path out be bad for smooth flow?

As for the sound clip I'm going to try and get it tomorrow.
And Sco, this is Rob.
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Regardless of whether backpressure is BS or not, wouldn't that big opening in the exhaust, only to have to squeeze back down to finish the path out be bad for smooth flow?


And Sco, this is Rob.
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Oh sh*t wussup Rob. Well I guess I'm going to pass up the 3.5" moroso muffler and wait for a few people that have them up for sale which are the 3" mufflers. If anything I may just buy it new. Someone also offered me a xr-1 borla which I can replace my chambered muffler with it. But I've been doing research and the twisters are more quiet then the xr1's.

Or another option is to buy a magnaflow muffler to replace my stock slp muffler. Place a 3" ipipe with my electric cutout in place. Or keep my stock slp exhaust and put my cutout in the ipipe without the chambered muffler. What do you think Rob?

hahaha, i'm actually thinking of getting new tips and when i do I will let you know bro!

Hey sounds good, just let me know.:D

Or another option is to buy a magnaflow muffler to replace my stock slp muffler. Place a 3" ipipe with my electric cutout in place. Or keep my stock slp exhaust and put my cutout in the ipipe without the chambered muffler. What do you think Rob?

A cut out is going to sound like ass no matter what with your long tubes, cats or not. Cats might cut down on some of the rasp but it's still going to be super loud. A staight through muffler like the bullets or twister is going to cut it back somewhat, but you won't know how much until you do it. that site I mentioned before has a bunch of clips. You can check out the cut out section and see if someone is running a small muffler pre CO with LTs like you and see if it sounds alright, or if there is no one doing that you can click on the true duals section. There are people there that are running LTs with no cats and bullet type mufflers. It's going to sound a bit cleaner though because most of them run a crossover, but it should give you some idea of the sound level.

Like Kraest mentioned before, at this point with your LTs your cut out alone is pretty much only good for a race, it'll be intolerable trying to cruise with it open.

You're talking about catbacks, and I don't know what it is you're looking for. That SLP DD you have on right now is one of the best flowing on the market. The hp you're going to pick up is going to be small and not worth the money IMO, but if it's a louder sound you're going for then that's a whole nother matter.

I heard that the SLP DDs really wake up soudn wise with a set of LTs on the engine.

Regardless of whether backpressure is BS or not, wouldn't that big opening in the exhaust, only to have to squeeze back down to finish the path out be bad for smooth flow?


It'll decrease velocity and cause some turbulence. Any muffler is a big openining in the exhaust if you want to be technical about it.

I have duel Cutouts and I love them..exspacialy when I go to the track...

hmmmm, thanks. I've got to think about this one now. Either its a magnaflow muffler or just replace my chambered muffler with a twister. Your right about only having a cutout, its not like I can drive it open it'll be way too loud. I'm thinking of just placing a magnaflow muffler in place and have a cutout in the ipipe. I wont know what I'm going to do till the end of the week. Thanks for the help guys!