Anyone consider race header + stock catback?

SonicK20Z · 06-08-2006, 04:03 PM

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.

BLU BY U · 06-08-2006, 04:26 PM

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.

slostjoe · 07-01-2007, 03:58 PM

This also is the same setup i will have shortly, especially my case im running n2o so i hope this setup will be efficent.

k20beast · 07-02-2007, 02:46 PM

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.

caveman74 · 07-02-2007, 03:37 PM

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

JMorris · 07-03-2007, 10:36 PM

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?

asdf · 07-04-2007, 01:50 AM

anyone have a video/sound clip of a race header with stock exhaust?

1cleanfg2 · 07-04-2007, 02:09 AM

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.

***Sirbelch*** · 07-04-2007, 02:21 AM

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.

alxwin · 07-04-2007, 03:08 AM

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

adamhoud · 07-04-2007, 04:45 AM

I have the ssr race header+ catback, not much difference in sound.

gtrice31 · 07-04-2007, 03:54 PM

how bout dyno results with that header and stock catback?

slostjoe · 07-04-2007, 04:27 PM

+1 im very interested in the outcome

adamhoud · 07-04-2007, 04:53 PM

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.

slostjoe · 07-04-2007, 05:07 PM

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

adamhoud · 07-05-2007, 11:25 AM

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.

civicx98 · 07-05-2007, 11:34 AM

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.

Stealthcivic · 07-13-2007, 01:53 PM

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

syun · 07-13-2007, 02:06 PM

I want to hear how the stock exhaust sounds with a race header. Can anyone show some videos?

iomatic · 07-13-2007, 02:20 PM

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.

06-08-2006, 04:03 PM	#1 (permalink)
SonicK20Z Senior Member Join Date: Jun 2006 Posts: 212 Rob iTrader: 0 / 0%	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.

07-13-2007, 01:53 PM	#18 (permalink)
Stealthcivic Senior Member Join Date: Dec 2005 Location: Charleston, Sc Posts: 629 iTrader: 0 / 0%	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

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Solution to more bass with stock system...	unplugged	I.C.E., Electrical, Security, & Navigation	6	01-19-2008 10:39 PM
dc race header	jdmk20z3	Bolt-Ons And All-Motor	54	07-05-2007 11:28 AM
Bone stock Si puts down 188 whp!!!!	954K20_SI	Civic SI	36	07-04-2007 05:39 PM
Race Headers Vs. Regular	Kabs	Forced Induction And Nitrous	7	11-11-2006 02:16 PM
Honda Civic SI 2006 Parts	SpeedDemon	Civic SI	2	03-30-2006 12:29 PM

06-08-2006, 04:26 PM	#2 (permalink)
BLU BY U Senior Member Join Date: Apr 2006 Age: 25 Posts: 7,669 iTrader: 2 / 100%	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.

07-01-2007, 03:58 PM	#3 (permalink)
slostjoe Senior Member Join Date: Apr 2007 Location: Springfield, MO Posts: 3,813 Skyler iTrader: 4 / 100%	This also is the same setup i will have shortly, especially my case im running n2o so i hope this setup will be efficent.

07-02-2007, 02:46 PM	#4 (permalink)
k20beast Senior Member Join Date: Feb 2007 Location: clemson SC Age: 19 Posts: 1,195 zack iTrader: 2 / 100%	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.

07-02-2007, 03:37 PM	#5 (permalink)
caveman74 Senior Member Member Join Date: Jul 2006 Location: Woodstock, Ga Posts: 2,384 Kevin iTrader: 19 / 100%	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

07-03-2007, 10:36 PM	#6 (permalink)
JMorris Senior Member Join Date: Apr 2007 Location: Concord Posts: 569 James iTrader: 1 / 100%	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?

07-04-2007, 01:50 AM	#7 (permalink)
asdf Senior Member Join Date: Jun 2007 Location: dallas Posts: 2,370 iTrader: 10 / 100%	anyone have a video/sound clip of a race header with stock exhaust?

07-04-2007, 02:09 AM	#8 (permalink)
1cleanfg2 Senior Member Join Date: Apr 2007 Posts: 105 iTrader: 0 / 0%	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.

07-04-2007, 02:21 AM	#9 (permalink)
*Sirbelch* Louder than 4 F404-GE-400 Join Date: Jan 2007 Location: Vacaville CA Age: 27 Posts: 6,496 Paul iTrader: 0 / 50%	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.

07-04-2007, 03:08 AM	#10 (permalink)
alxwin Senior Member Join Date: Jun 2007 Location: The woodlands Posts: 157 Alex Nguyen iTrader: 0 / 0%	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

07-04-2007, 04:45 AM	#11 (permalink)
adamhoud Senior Member Join Date: Sep 2006 Location: Bay Area, CA Posts: 1,035 Adam iTrader: 3 / 100%	I have the ssr race header+ catback, not much difference in sound.

07-04-2007, 03:54 PM	#12 (permalink)
gtrice31 Senior Member Join Date: Feb 2007 Posts: 173 iTrader: 2 / 100%	how bout dyno results with that header and stock catback?

07-04-2007, 04:27 PM	#13 (permalink)
slostjoe Senior Member Join Date: Apr 2007 Location: Springfield, MO Posts: 3,813 Skyler iTrader: 4 / 100%	+1 im very interested in the outcome

07-04-2007, 04:53 PM	#14 (permalink)
adamhoud Senior Member Join Date: Sep 2006 Location: Bay Area, CA Posts: 1,035 Adam iTrader: 3 / 100%	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.

07-05-2007, 11:25 AM	#16 (permalink)
adamhoud Senior Member Join Date: Sep 2006 Location: Bay Area, CA Posts: 1,035 Adam iTrader: 3 / 100%	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.

07-05-2007, 11:34 AM	#17 (permalink)
civicx98 Member Join Date: Jun 2006 Posts: 52 iTrader: 0 / 0%	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.

07-13-2007, 02:06 PM	#19 (permalink)
syun Member Join Date: Dec 2006 Posts: 75 iTrader: 2 / 100%	I want to hear how the stock exhaust sounds with a race header. Can anyone show some videos?

07-13-2007, 02:20 PM	#20 (permalink)
iomatic Senior Member Join Date: Apr 2007 Age: 38 Posts: 1,771 iTrader: 0 / 0%	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.