So I got a notice in the mail from my community about the complaints of the loud exhaust. I would have to agree. Its to the point where I don't like it. I'm sick of the loud car (MOST OF THE TIME).. So I have decided I need to so something about it. I have decided to cut out a piece of the loudmouth and put a nice mild muffler in there and install a electric cutout just before the muffler. Has anyone ever done this?.

What diameter is the SLP Loudmouth? and does anyone know how much room I have to work with to add a muffler?. I assume it needs to be a tube type. Any help would be greatly appreciated.

Thank You

 

So, think this insert in the tip would do anything?

http://cgi.ebay.com/ebaymotors/3-5-E...item2eaea55fc9

Its cheap and it may work. and a whole long cheaper than cutout and muffler idea

Thanks

 

I wouldn't waste my money on it.

Buy a center in/out Magnaflow 2.5" and install it in the pipe that crosses over to the driver side. Then buy a 2.5" cut-out to install on the passenger side-

You will have best of both that way- nice tone and a really loud bark when you want it..

But after buying all that you will be halfway to a new exhaust. Your best bet would prol be buy a new exhaust you want, then sell your loudmouth-

 

I believe the piping over the axle is 3" - anybody else know for sure?

My car came with the Loudmouth system and it became obnoxious pretty quickly. I pulled off the back half of the system and sold it on eBay to someone who had been rear ended and damaged that part of their exhaust for ~$200. Then I put a factory style Hooker Aerochamber where the factory muffler went and bent new tailpipes.

 

Yes- 3" over the axle and then splits into dual 2.5" out each side.

 

Thank you. So the place I would be able to weld in a inline muffler or high flow cat would be right behind the gutted cat on that nice long straight shot and I would need to get 3" diameter?

Any idea on length that would fit. I didn't go measure but I betting there is at least 2.5 feet of straight shot there? (if i remember correctly)


Think a high flow cat would do the trick?

 

I believe he was suggesting you put the muffler in the pipe that occupies the space once used by the stock muffler (behind the axle.) That area is 2.5" pipe and can accomodate a full-size muffler. If you put one behind the cat but before the axle, you'll need a bullet-type muffler with 3" in/out. The muffler behind the axle, combined with a cutout on the passenger side tailpipe, makes for a homebrewed Borla of sorts.

 

Yes sir- thank you-

And if you put in a bullet type on the straight section after the cat its prol only going to marginally quiet it down- but also keep in mind there isn't much room between the passenger back seat floor pan and the driveshaft to put anything bigger than 4" unless you either let it hang down lower (yuck) or 'massage' the floor pan to allow the exhaust to sit up closer to the floor.

I know all this because even with my TSP Rumbler I ended up giving myself some more room to allow the resonator to sit up closer to the floor. One of my pet peeves is being able to see exhaust hanging down under the car.

 

A buddy welded a Magnaflow bullet in place of the stock resonator, and I don't think it sounded any different. I've never heard a Loudmouth that didn't sound like garbage, regardless of what bullet muffler you throw at it. The "build-a-Borla" at least has a fighting chance of sounding decent. The other option is that newer Power-Flo conversion that SLP sells, although not many people seem to be running it. I can't find a clip anywhere of that system on an LT1, so I have no idea how it sounds.

 

I've got the loudmouth II and I think even that is a little on the loud side- tends to drone at certain rpms. I can't imagine how bad the original loudmouth is, since everyone says the lm2 is much quieter. Might be better off just not having a muffler. On the other hand, even strangers sometimes comment on the nice sound...

Anyone running a loudmouth system can interchange bullet mufflers- just keep in mind there's not much space. It would be best to measure exhaust sizes and clearances before ordering anything, although I'm pretty sure SLP sells the LM2 "muffler" separately that should just fit right in.

Keep in mind that any straight through bullet style system is going to be louder than the other stuff (aside from straightpipes or chambered such as gmmg).

Aside from the stock exhaust adapter piece that attaches to the y-pipe, the slp system is 3" until it splits to two 2.5" pipes behind the rear axle.

From what I hear the Magnaflow is a little quieter and sounds good too, has a "normal" 1 in 2 out muffler, and is the only other stainless setup out there that is reasonably priced.

 

I have the same issue you are running into. I told the homeowners association to go pound sand as the exhaust meets legal drive by DB levels and that is all that matters. They are drive Hybrids so not surprising they bitch about the exhaust, they are jealous.

Anyway I have been thinking about finding a way to get rid of the drone that I have around 65-75 MPH. Currently I have long tubes, y pipe, to SLP loudmouth 2. I have been thinking about putting in high flow cats and see if that helps. You said yours were gutted so may be worthwhile trying to put cats back in and see what you get. If still not enough maybe remove the SLP resonator and install your cutout there then add a magnaflow muffler out back. Good luck. Let us know what you end up doing and the outcome.

 

I aded a CCI 3 disk insert to a Mufflex 3 1/2". Also, user the 3/4" cap in the inlet tube. Helped alot (on a 97ss 383_D1 MM6). I had alot of noise thru a SpinTech single muffler w/ no cats. FI applications tend to make much more noise than NA apps. I would have had trouble on the road with that noise.
B.

 

http://cgi.ebay.com/ebaymotors/BULLI...Q5fAccessories


I put that in place of the resonating chamber of the SLP loud mouth, it just fit and it did wonders. It sounds very nice, its deep and quiet unless I am in the throttle. I like it. I do feel a bit or power loss tho. I have a electric cutout I will install next year in place of the gutted cat.

 

any pics of it from the side underneath? 5 inch sounds big to fit.. i have the LM1 kit on a heads/cam/lt/ory 01 SS. it is obnoxious from 2-3k part throttle and just plain nuts on an all around level. ive ordered a moroso spiral flow 3 in/out 18 inch long to replace the resonator. a bunch of ppl over on tech recommend it. i will keep ppl posted on my results.

 

ahh, I know I had one but I cant find it anywhere,and the camaro is in storage already for winter.

That thing just barley fit, the shop that installed it actually had to cut a straight cut on the angled part of the pipe, so the part welded into the muffler is not a straight pipe, its angle then cut flat. hard to explain, be he got it in and it does not sit low, or touch the drive shaft. and sounds great. :-). it even a little mellow (witch i like 90% of the time, but its still nice and deep), but I got a 3" electric cutout I will put in place of the gutted cat next year.