Loudest street legal sound?

2Stock · Nov 28, 2004

My town is going to be doing the sniff test in about a year so I need to keep my cats. I am looking for the loudest street legal combo that isn't raspy, I want that deep rumble sound. Any ideas? I have looked over at mustangexhaust but that doesn't help much.

I really want some single chamber flowmasters but will they allow me to pass the sniff test?

Bill9000 · Nov 28, 2004

2Stock said:
My town is going to be doing the sniff test in about a year so I need to keep my cats. I am looking for the loudest street legal combo that isn't raspy, I want that deep rumble sound. Any ideas? I have looked over at mustangexhaust but that doesn't help much.

I really want some single chamber flowmasters but will they allow me to pass the sniff test?

Well I'm just about ready to put one chamber flows on my car, because on my last car, the 2-chambers were waaaay to quiet for me. (but I don't have smog here)

But here's something I have learned since then:

The stock H-pipe is what's really killing the sound, since they have so many cats

My suggestion: Get an off-road H-pipe, that bolts in, keep the stock one, put 2-chambers on it, and when you have to smog, stick the stock H back in, afterwards, put your new H-pipe back in, you should see a substantial gain in HP and also a way better sound.

However, if someone else here can answer the direct question, of having cats, will the one chambers pass smog??? I'd be interested in knowing that answer, just in case they ever make smog here.

2Stock · Nov 28, 2004

Bill9000 said:
Well I'm just about ready to put one chamber flows on my car, because on my last car, the 2-chambers were waaaay to quiet for me. (but I don't have smog here)

But here's something I have learned since then:

The stock H-pipe is what's really killing the sound, since they have so many cats

My suggestion: Get an off-road H-pipe, that bolts in, keep the stock one, put 2-chambers on it, and when you have to smog, stick the stock H back in, afterwards, put your new H-pipe back in, you should see a substantial gain in HP and also a way better sound.

However, if someone else here can answer the direct question, of having cats, will the one chambers pass smog??? I'd be interested in knowing that answer, just in case they ever make smog here.

Would you suggest taking out my slp resanators and welding in some 2 chambers? Or just buy a whole new catback?

myponyrocks · Nov 28, 2004

I'm running a catted prochamber and weld in flows, its not the loudest, but it will turn heads, with bigger pipes I'm sure it would wake up.
Theres quite a few cat backs that are obnoxious even with the stock H, but you should look into a catted H or X

Mustang5L5 · Nov 28, 2004

2Stock said:
I really want some single chamber flowmasters but will they allow me to pass the sniff test?

Mufflers won't fail your emmissions test.

They can only fail you if it's too loud, and that rarely happens if you have a stock H-pipe on.

I like in MA which has strict emmissions tests and they never really bust my balls on Flows when i go get my sticker. They kinda expect Musdtangs to be loud. You need an H-pipe with cats of some sort. No way will you pass with an off-road pipe.

narongc73 · Nov 28, 2004

Any modification to your exhaust system is illegal if you get caught.

bdcardinal · Nov 28, 2004

a catback will not affect emissions. i work for a smog referee here, we deal with engine swaps, gross polluters, noise violations and emissions violations ie police tickets to ricers. we dont care what people do after the cats as long as it isnt too loud. we do a seperate sound test with a Db meter only if there is a police ticket for being too loud. the only modifications to your exhaust that are totally illegal are modifying stock cats on a 96+ car. anything but all 4, or 6, OEM cats in CA on the stock piping is highly illegal.

ACSPONY · Nov 28, 2004

2Stock said:
Would you suggest taking out my slp resanators and welding in some 2 chambers? Or just buy a whole new catback?

How does the SLP catback sound?

2Stock · Nov 28, 2004

ACSPONY said:
How does the SLP catback sound?

It sounds good, but it isn't the sound I was really looking for. I fell in love with my old setup and have always loved the flowmaster sound on mustangs myself.

guess I will be getting some 1 chambers soon

myponyrocks · Nov 28, 2004

narongc73 said:
Any modification to your exhaust system is illegal if you get caught.

???Maybe in CA and even then I think that Nazi state has exceptions (Like CARB legal catbacks and what not)

bdcardinal · Nov 28, 2004

CARB doesnt care about catbacks. the police care when you drive past a cemetary and wake up the dead though. the legal limit for sound here is 96.5Db. there are stock SRT-4s that are failing that law.

Loudest street legal sound?

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