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Old 06-08-2006, 04:03 PM   #1 (permalink)
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Anyone consider race header + stock catback?

I've had the RH and aftermarket catback on my RSX, and it was just too loud, too raspy/ricey sounding, and it just got old real fast. I was set on doing just a nice catback (Comptech) for the Si and not messing with the header and cat. However, with the recent introduction of the Hondata flash, I am considering the RH again. But I don't want to sound the way my RSX did.

After looking at Hondata flash page for the Si again, I noticed something, and decided to ask Hondata on their forum... check it out:

http://www.hondata.net/forum/viewtopic.php?t=4870


You'll see that they actually ran the RH w/ the stock catback. I know more than a handful of people that did this on ClubRSX as well to gain the benefits of the RH but without making it too loud, or losing the stock look.

Any other thoughts or opinions on it? I mean, you can see on the Hondata's dyno graph the amazing gains with the RH even with the stock exhaust, so it can't be too bad in a performance aspect, and I'm willing to bet it's not too loud either with the stock piping and muffler.

I'm strongly considering it.
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Old 06-08-2006, 04:26 PM   #2 (permalink)
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that is exactly what i am doing....DC RH with stock cat-back. You see minimal gains with a cat-back since hondas exhausts are already free flowing. I want the outside of my Si to apear completely stock and when i'm not flogging it....i want it to sound stock too.
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Old 07-01-2007, 03:58 PM   #3 (permalink)
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Cool

This also is the same setup i will have shortly, especially my case im running n2o so i hope this setup will be efficent.
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Old 07-02-2007, 02:46 PM   #4 (permalink)
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i dont think itd be a bad idea...and yess my exhaust is really damn loud.... if u had a race header and removed one res. it be ab like aftermarket exhast IMO. bc the exhaust flows goodand if im not mistakin most aftermarket still have a res.
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Old 07-02-2007, 03:37 PM   #5 (permalink)
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I'm running DCRH w/ stock catback and love it. I think it gives the right tone and isnt to loud. Only thing I dont like is I am getting an exhaust vibration somewhere. Either the muffler or heat shields
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Old 07-03-2007, 10:36 PM   #6 (permalink)
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Living in CA I cant do the race header but do you think a random tech cat would be just as or nearly as good?
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Old 07-04-2007, 01:50 AM   #7 (permalink)
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anyone have a video/sound clip of a race header with stock exhaust?
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Old 07-04-2007, 02:09 AM   #8 (permalink)
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I have the bcrh with the stock exhaust and it sounds perfect, not too loud and a nice growl. It basically just makes it deeper.
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Old 07-04-2007, 02:21 AM   #9 (permalink)
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I have the comptech exhaust and i think it sound great but no RH. However, my friends say they can here me a block away on when i come home at 1130pm from work. During the day though, they cant hear me until i'm in the driveway.
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Old 07-04-2007, 03:08 AM   #10 (permalink)
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I personally like the sound of catbacks...maybe cuz i like to be noticed..but who wouldnt if youve got an SI : )....also if you plan on making major upgrades to engine and doing forced induction you may need a wider exhaust
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Old 07-04-2007, 04:45 AM   #11 (permalink)
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I have the ssr race header+ catback, not much difference in sound.
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Old 07-04-2007, 03:54 PM   #12 (permalink)
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how bout dyno results with that header and stock catback?
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Old 07-04-2007, 04:27 PM   #13 (permalink)
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+1 im very interested in the outcome
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Old 07-04-2007, 04:53 PM   #14 (permalink)
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http://www.8thcivic.com/forums/attac...9&d=1183572527

200/150, the first run was just a first run, not warmed up, and this is with a magnaflow high flow cat in place of the test pipe portion.
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Old 07-04-2007, 05:07 PM   #15 (permalink)
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Quote:
Originally Posted by adamhoud
http://www.8thcivic.com/forums/attac...9&d=1183572527

200/150, the first run was just a first run, not warmed up, and this is with a magnaflow high flow cat in place of the test pipe portion.
What mods in total do you have because those are goo numbers
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Old 07-05-2007, 11:25 AM   #16 (permalink)
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I have:

Injen CAI
SSR Header with $80 Magnaflow high flow cat welded in place of test pipe
Hondata reflash, doesn't do anything for total hp but gives me a midrange.
Hondata IMG, and P2R TBG with TB bypass, not sure that they do anything.

My Comptech exhaust should be in on Tuesday, I will be heading back out to SSR and do a re-run as my car is, and then do a quick swap to the comptech exhaust and see exactly how much more I make with it. I definitely think that exhaust on the si is already really good stock, just a little quiet.
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Old 07-05-2007, 11:34 AM   #17 (permalink)
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I had the DCRH and a stock exhaust and live in the same city if you want to hear what it sounds like. The K&N intake is louder then the exaust. As far as dyno #s, I gained 14hp with an AEM CAI and DCRH. I took the AEM off cause it was garbage.
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Old 07-13-2007, 01:53 PM   #18 (permalink)
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might do the same

I am considerin gettin the buddy club race header, hondata , and leaving my stock exaust to retain the stock look, I am really about to order both right now after researchin and talking about it for a while, bcrh and hondata for my bone stock si, thanks for the info, I have seen the dyno on hondata's site, thank you bro for starting this thread
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Old 07-13-2007, 02:06 PM   #19 (permalink)
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I want to hear how the stock exhaust sounds with a race header. Can anyone show some videos?
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Old 07-13-2007, 02:20 PM   #20 (permalink)
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Stupid question:

Are all race headers "designed" for the FGs only? Will adding one to the Si sedan require a 2" addition, or is that extra pipe down more toward the exhaust; i.e., is this a simple bolt-on (well, after lifting the thing, removing cowls, etc.) without welding for the FA5?
Thanks.
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