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Which muffler to run?

  • Moroso Spiral Flow

    Votes: 4 28.6%
  • Dynomax Welded UltraFlo

    Votes: 6 42.9%
  • El Cheapo Glasspacks

    Votes: 1 7.1%
  • Something else under $50

    Votes: 3 21.4%

  • Total voters
    14
  • Poll closed .
1 - 20 of 32 Posts

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Discussion Starter #1
OK folks, I want to finish out my 3" exhaust setup for the old boosted D17. and I need a little advice of which muffler to go with. Here's my current setup that isn't going to change:

- 3" downpipe mating up to a 3" (in/out) Magnaflow cat
- open dumptube

That plugs into a 2-1/4" NA catback system (Nopi N1 stealth) which ends in a 4"-tipped fart cannon. This actually doesn't sound that bad, but I know it's killing my spool and is too restrictive.

Now I originally thought about not running a muffler at a all and just shooting 3" tubing straight out the ass of the Civic with a downturned 3" tip - basically just a cut U-bend. I don't care about looks because the whole exhaust will be painted flat black.

I'm not looking to spend a lot of money on a muffler. $50-60 bucks maximum. I want something that doesn't restrict flow, but still quiets things down a little bit on idle and vacuum driving. She can be as loud as she wants under boost, in fact it's supposed to be loud when the snail is spooling.

I was thinking about just running the Moroso Spiral Race "Muffler", which is Here and claims to drop 5 dBs from an open exhaust, looks like this, has this advertised blurb, and goes for $50 from Uncle Summit. It also does not have any packing material to slow things down:

Using advanced gas dynamics and sophisticated noise cancellation acoustics, Moroso engineers have developed a new series of Racing Mufflers. Specially engineered spiral baffles divide the exhaust flow into two separate paths, significantly reducing noise levels with minimal backpressure. The all-steel construction makes them durable – our efficient manufacturing process makes them affordable!



Another option is the DynoMax Ultra Flo Welded Race Muffler (Click Me). This is one is about $45 from Uncle Summit, is a fiberglass packed muffler, flows 1100 CFM, and looks like this and has this blurb:

100% Welded construction for maximum durability.
100% Aluminized materials for long life.
Ultra Flo Technology features straight-through design for maximum flow and power.
CRF (Continuous Roving Fiberglass) technology delivers an aggressive, powerful, deep performance sound.





Or I can run a couple glass packs.

Or ____________________ (your suggestions).

Let me know. My price point is as stated. Exhaust noise is already brought down by the turbo and kitty cat. I just want something to keep things a little quiet at idle and vacuum driving. I'll be welding this system myself, so no catback or axleback suggestions. Thanks!
 

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Discussion Starter #5
Hmm....The OBX one does come is a 3" diameter inlet and outlet (the really cheap one is a 2.5" innie) and runs $80 plus shipping. That's not awfully expensive. Gonna research that a little bit. Good suggestion. Keep em coming!
 

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Discussion Starter #6
Here's what the Ebay twin loop sounds like. Shit. (http://www.youtube.com/watch?v=UERTqug-GoQ)

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Discussion Starter #7
Here's a nice clip of the Dynomax on an NA car with a glasspack resonator. This might be the ticket: (http://www.youtube.com/watch?v=yjw3eW66WLM)

<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/yjw3eW66WLM&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/yjw3eW66WLM&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>
 

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get an N1 woot woot!!

if i wouldnt have stumbled across a kteller for CHEAP i would be getting a new apexi
 

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The Moroso actually sounds pretty good.

We tried one out on a friend's raspy sounding exhaust, and it took if from raspy nasty sound to a pretty damn good tone. This was on a NA car with a Comptech rear muffler section..

I will probably get one to use on my hatch if/when it gets a turbo setup.

The Dynomax Race Bullet, by itself, is loud as hell. Another friend of mine has a pair of these on his 64 Impala. Yes, I know totally different application, but you can still get an idea as to how loud or not a muffler will be. They sound...different. I kind of like the sound, but it is really different.
 

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Discussion Starter #13
Yeah, the only thing I'm worried about with the Moroso is back pressure since it isn't a straight through design. No one seems to run these on little 4-bangers so getting a sound clip has been difficult unless I want to hear Chevy 350s and Firebirds with them. Although those sound pretty damn good.
 
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