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  1. #1
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    Exhaust question...

    Hey guys, currently in Iraq, planning my jrsc-r build for when I get back.
    Currently my car has AEM CAI, Skunk stage 1 NA cams, stock header, stock cat to Megan midpipe to OBX twinloop.
    Going to be getting a race header for it for sure but was wondering what I should do about my midpipe, I'm worried about it being too loud without the cat. Was wondering if you guys think I should just go for it and get a KRRH and then 3" back to a resonator and through to my OBX/another axle back. Or if I can get a different header and save my Megan/OBX combo and deal with how loud it is. Basically just wanna know what you guys would do in my situation, I can afford to buy a whole new exhaust, but would rather not if it's not going to make much more power. At the moment with the cat/megan midpipe/obx, it's just about as loud as I want it to be, and that's the only reason I don't already have a RH. Appreciate the help.

  2. #2
    Registered User black05ep's Avatar
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    if you midpipe is 2.5 or larger you should be good to keep that your running a twin loop so its not going to be loud. i plan on running a similar setup. right now i have a dcrh no cat. into a skunk2 2.25 exhaust. loud as shit. but i felt big gains witht the RH. i like the loudness. but for you what your running now sounds good for your plan.alot of ppl are running a platinum spun cat. i think talonxracer started that. not sure.or you can get a universal resonator. it depends if you want to be legal or not. hope that helps. im sure someone else will chime in. maybe pm talon about the cat.

  3. #3
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    I don't care about staying legal, more worried about noise than anything. I really don't want to have to listen to it droaning all the time on the highway, it's almost at that point as it is, without a cat or resonator I'm afraid it'll be too much for me. Thanks for the input.

  4. #4
    Drift Away... Distance's Avatar
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    vibrant sells an ultra quiet resonator. it might help with your set up and not be restricted.

  5. #5
    Registered User black05ep's Avatar
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    Quote Originally Posted by XytL View Post
    I don't care about staying legal, more worried about noise than anything. I really don't want to have to listen to it droaning all the time on the highway, it's almost at that point as it is, without a cat or resonator I'm afraid it'll be too much for me. Thanks for the input.
    My exhaust doesn't drone AT ALL. Idk y. But check out that resonator. Should give more flow than the cat and keep the sound down.

  6. #6
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    Alright awesome thanks for the help, gonna get KRRH and bolt it up to my current setup, see how it sounds. If it's too loud I'll through that resonator on. Am I right in assuming the KRRH has the stock flange so it will join up with my midpipe no problem?
    Last edited by XytL; 01-05-2011 at 08:29 PM.

  7. #7
    Supercharged K24A2 vbpracer's Avatar
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    Why not stick with the stock muffler? Will eliminate most sound, without restricting the exhaust flow.

  8. #8
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    Alright so according to the threadhere 3.0 piping is the way to go, but my question is this, if the KRRH flows to the midpipe at 2.5" what's the point of bumping it up to 3" for the rest? Am I missing something? I would like to go 3 inch but I'm not sure I'd have enough clearance to roll like that, I already scrape on every speed bump ever with my 2.25" midpipe. I'm dropped on Koni Yellows with H&R springs, 2 inches I believe. Any help I can get with a few more recommendations would be awesome.

  9. #9
    Mean Old Bastard Lucid Moments's Avatar
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    Just my POV having a lot of experience with a loud assed, supercharged car. A 3" exhaust is loud. That is all there is too it, and you won't loose much power staying with a 2 1/2 inch.

    If my car was any sort of a DD then I would have a 2 1/2 inch exhaust on it and damn any possible power loss.

  10. #10
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    Alright right on, appreciate it, after taking off my cat I might have to throw a resonator in my midpipe then, it's right at the edge of being too loud for me atm, without a cat its gonna be too much I believe.

  11. #11
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    Alright so, back from Iraq, starting to put parts on. Got my KRRH installed and bolted to my megan midpipe. I absolutely can't stand the sound it makes. I want it to be deep, it has this super rice buzz to it after 4k rpm. You guys think a custom 2.5" with a vibrant ultra quiet resonator will be what I'm looking for? Planning on leaving my twin loop on there, almost positive it's the resonator in the midpipe that's making this awful noise. Sounds like every other civic that has a cheap exhaust I guess.

    Oh, and JRSC sitting next to me, this weekend I hope.

  12. #12
    Heading for 600rwhp! BlownSi05's Avatar
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    Quote Originally Posted by Distance View Post
    vibrant sells an ultra quiet resonator. it might help with your set up and not be restricted.
    I had this resonator when I tried the OBX loop muffler and it did not help much.

    OP, your better bet is an 18" bullet style resonator, which is a longer resonator, which in turn gives you more length to quiet the exhaust. I had a JRRH, Vibrant Ultra Quiet Res and OBX muffler with a 2.5" full stainless piping kit and I took it off a week after I had put it on. The bullet style resonator would have made it more bearable. I ended up with a Fujitsubo RM-01a cat back, which is CTR specific only. I used a Megan Stainless Shorty Header and a Megan Stainless Resonated Test Pipe, both RSX-S specific. It was pricey, but the sound was phenomenal and there was almost no drone at highway speeds.

    This is my former EP.
    http://www.youtube.com/watch?v=l2wSr9djK1Y


    The stock muffler is also an option. But I can tell you now, your rice rocket buzzing sound above 4K RPM is the OBX loop muffler. Just my 2 cents!

  13. #13
    Mean Old Bastard Lucid Moments's Avatar
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    I also have the OBX loop muffler and it was a big improvement over the 3" straight through Magnaflow it replaced. I guess it depends on what you are comparing it too as to how it sounds. The 3" may be part of the difference too.

  14. #14
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    Well I went ahead and bought a 2.5" ultra quiet resonator and a 2.5" vibrant muffler, hoping it quiets down a bit. I'll throw in a hi flow car if I need to. Got a place here that is gonna custom mandrel bend me a 2.5" setup for 200 bucks so I figure that's a pretty decent deal. Hoping that cuts the noise out, I don't even like to drive with my car like this.

  15. #15
    Registered User 04EP3Hatch's Avatar
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    Quote Originally Posted by XytL View Post
    Well I went ahead and bought a 2.5" ultra quiet resonator and a 2.5" vibrant muffler, hoping it quiets down a bit. I'll throw in a hi flow car if I need to. Got a place here that is gonna custom mandrel bend me a 2.5" setup for 200 bucks so I figure that's a pretty decent deal. Hoping that cuts the noise out, I don't even like to drive with my car like this.
    hate to tell you this, but i have that exhaust setup to the T. and its actually louder anything over half throttle than my 3" was:

    3" Catback with Vibrant Muffler and 15" resonator


    2.5" Catback with Vibrant Ultra queit and Vibrant streetpower twin tip:

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