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Old 09-11-2007, 02:02 PM   #1
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Default Which exhaust is the quietest?

I want to change my exhaust again (have 2.5" crush-bent w/ cat, resonator, and thermal muffler) but it's way too loud. Anyone knows of any good turbo exhaust which is also very quiet?
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Old 09-11-2007, 02:05 PM   #2
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Keep in mind that your current exhaust will get much more quiet once you get the turbo on.

my dynomax super turbo (~$50 at advance auto parts) 2.25" is reasonable on my NA car with the high flow cat and 2.25" cat-back. I imagine the 2.5" version would sounds good without being too loud on a turbo car.
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Old 09-11-2007, 02:09 PM   #3
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i hope so. right now it gets extremely raspy past 4k rpm and its WAY too loud even at idle. i still have jrsc in it right now.
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Old 09-11-2007, 02:14 PM   #4
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you cant even hear my exhaust over the turbo
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Old 09-11-2007, 03:07 PM   #5
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haha! this is exactly what im trying to avoid. california police is very strict and i really dont want to see my car being crashed along with some shitty hondas :/

im going for a sleeper look
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Old 09-11-2007, 04:07 PM   #6
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must suck for you guys...i dont know what i would do if i saw my car being crushed, and its not even turbo yet...i think id cry...seriously
as far as your question, ill ask a friend of mine, his car looks stock but is pushing almost 300 rwhp on 15 psi...exhaust very quiet, looks stock too and ill let you know
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Old 09-11-2007, 04:10 PM   #7
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Quote:
Originally Posted by UrbanSoot View Post
haha! this is exactly what im trying to avoid.
you're trying to advoid an exhaust that sounds equal to stock? cause that's what I'm saying mine sounds like.
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Old 09-11-2007, 07:22 PM   #8
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whaaamx5: please ask him what exhaust he is running
Braineack: im trying to avoid any sounds at all that would point out my "non-stockness" to cops. which exhaust are you running?
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Old 09-12-2007, 02:20 AM   #9
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It will quiet down a LOT when the turbo goes on, believe me. I don't have a muffler on either car and neither is all that loud.
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Old 09-12-2007, 03:32 AM   #10
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hopefully that freaking rasp will go away too! cant stand it. feels like im driving a honda civic or something :/
i even stopped driving my miata since i got that exhaust!
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Old 09-12-2007, 03:35 AM   #11
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Until my Enthuza and other components go on mine, the Miata is just Greddy DP > stock cat > mufflerless stock piping. Before the turbo it was the same, and it was LOUD AS **** and very raspy. Now that the turbo is on it is very quiet.
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Old 09-12-2007, 03:40 AM   #12
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ive got 2.5"dp, 3" cat, 3" catback w/ dynomax race muffler/resonator and a summit turbo muffler. Its sorta loud, bout like any aftermarket catback sounds.
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Old 09-12-2007, 03:54 AM   #13
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I don't think my Enthuza 3" is very loud at all. It definitely sounds a little different from stock, but it's not all that different. The turbo will quiet the car down a lot.
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Old 09-12-2007, 03:55 AM   #14
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try HKS
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Old 09-12-2007, 01:34 PM   #15
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hks is nice but way too expensive. im on a budget
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Old 09-12-2007, 02:18 PM   #16
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To answer the title of this thread:

The OEM exhaust.
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Old 09-12-2007, 02:36 PM   #17
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yeah, but its not really suitable for turbo, is it?
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Old 09-12-2007, 03:23 PM   #18
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a 2.5" with cat, resonator and muffler will not be loud.

http://youtube.com/watch?v=R_IU4OnItxA

This is with a 2.25" borla catback with an exhaust leak between the DP & Cat.

The additional turbo noise wont have cops looking if you arent boosting around like a dickwad.
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Old 09-12-2007, 04:57 PM   #19
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My car is quieter than any miata with an aftermarket exhaust.

I have a Maremont metal cat, a 2.5" Dynomax resonator, and the largest 2.5" straight-through Magnaflow muffler that would fit. I think it's 4x8x22":

pics:
http://forum.miata.net/vb/showpost.p...9&postcount=15
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Old 09-12-2007, 06:11 PM   #20
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wow... i might just give it a try later! i want it to be as quiet as my rsx type s. i dont really like loud exhausts
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