Race Header collector sizes??

asdf · 06-26-2008, 01:05 PM

I was wondering what the collector size on all race headers' for our cars, ie: buddy club, dc, ssr, strup....etc.

I thought they would be at least 2.5"

Nexx · 06-26-2008, 01:44 PM

Need to search. I would post the links but the edge network on my phone blows.

From my recollection:

DCRH = 1.9"-2.0"
BCRH = 2.25"
Vibrant = 2.5"

All measurements are claimed inner diameter.

asdf · 06-26-2008, 01:48 PM

Quote:

Originally Posted by Nexx

Need to search. I would post the links but the edge network on my phone blows.

From my recollection:

DCRH = 1.9"-2.0"
BCRH = 2.25"
Vibrant = 2.5"

All measurements are claimed inner diameter.

I searched but nothing came up or if I searched all post there were million threads of nothing...wow, I thought all them would be 2.5". And people are still making power on smaller sizes.

But to add to this, I called Strup and they said theirs is 2".

***CorSport*** · 06-26-2008, 05:31 PM

Strup 2" collector and flange
BCRH 2" collector then a 2.5" flange
DCRH 2" collector and flange
Vibrant 2.5" collector and flange

asdf · 06-26-2008, 05:34 PM

Thank you sir.

***CorSport*** · 06-26-2008, 05:39 PM

No prob.

**NitrousG35** · 06-26-2008, 05:42 PM

Quote:

Originally Posted by CorSport

Strup 2" collector and flange
BCRH 2" collector then a 2.5" flange
DCRH 2" collector and flange
Vibrant 2.5" collector and flange

Excellent info. I added this info the Mother of all race header questions thread.

BTW, I am elated at the specs on the Vibrant. Size matters!

asdf · 06-26-2008, 05:43 PM

Would you, or anyone, happen to know the other RH size? I'm guessing they are going to be 2.5" for the price they are.

**NitrousG35** · 06-26-2008, 05:49 PM

A cursory look at the Hytech and SSR would seem to indicate a 2.5 collector and outlet flange diameter.

Bboy_Burst · 06-26-2008, 06:03 PM

does that means the vibrant makes more hp than bcrh/dcrh/strup??

2xSi · 06-26-2008, 06:14 PM

I have a DCRH in my garage. I got only 1.875" when I measured.

***CorSport*** · 06-26-2008, 06:23 PM

Quote:

Originally Posted by Bboy_Burst

does that means the vibrant makes more hp than bcrh/dcrh/strup??

No, that is not necessarily the truth. Sometimes back pressure can make more power. Every setup is going to vary a bit, different intakes, different exhausts, different mods, etc.

Tai

Nexx · 06-26-2008, 09:48 PM

Quote:

Originally Posted by 2xSi

I have a DCRH in my garage. I got only 1.875" when I measured.

My DCRH was measured at 1.9" (eye balling w/ a ruler). If what NitrousG35 says is true, the Vibrant RH may be the only true 2.5" (reasonably priced) header. :P

Bboy_Burst · 07-05-2008, 04:12 AM

Question: when i had a bcrh (2.0) with stock exhaust, i was making good power. if i use a vibrant rh (2.5), would it require a better exhaust than the stock one since the collector size is bigger?

**NitrousG35** · 07-05-2008, 09:42 AM

Quote:

Originally Posted by Bboy_Burst

Question: when i had a bcrh (2.0) with stock exhaust, i was making good power. if i use a vibrant rh (2.5), would it require a better exhaust than the stock one since the collector size is bigger?

It wouldn't hurt. I know several people who have run the stock exhaust w/the Vibrant header and have been rather disappointed by the performance.

MutantCheese · 07-05-2008, 09:56 AM

This is very interesting info. I just assumed that all aftermarket headers were at least 2.5".

***CorSport*** · 07-05-2008, 11:11 AM

Personally id go small header collector and any 60mm exhaust.

Tai

redline8500 · 07-05-2008, 12:11 PM

my dc is costom from the collector back my flex broke so i tig welded a piece of 2.25 pipe and borred out the flange as well to match my evo2 and man does she pull alot harder now

Bboy_Burst · 07-05-2008, 01:30 PM

Quote:

Originally Posted by NitrousG35

It wouldn't hurt. I know several people who have run the stock exhaust w/the Vibrant header and have been rather disappointed by the performance.

yea, it sucks to buy a header for couple $$$ and being disappointed afterward.
i wonder how the ssr or hytech header will perform with a stock exhaust.

Quote:

Originally Posted by CorSport

Personally id go small header collector and any 60mm exhaust.

Tai

how many mm is the stock exhaust??

***Excalibur*** · 07-05-2008, 02:56 PM

Quote:

Originally Posted by Bboy_Burst

Question: when i had a bcrh (2.0) with stock exhaust, i was making good power. if i use a vibrant rh (2.5), would it require a better exhaust than the stock one since the collector size is bigger?

You could upgrade the exhaust w/ what you have now since the flange is the same size on both anyways. Same bottleneck on both headers.

06-26-2008, 01:05 PM	#1 (permalink)
asdf Senior Member Join Date: Jun 2007 Posts: 1,025 iTrader: 5 / 100%	Race Header collector sizes?? I was wondering what the collector size on all race headers' for our cars, ie: buddy club, dc, ssr, strup....etc. I thought they would be at least 2.5" Last edited by asdf; 06-26-2008 at 01:32 PM.

06-26-2008, 05:31 PM	#4 (permalink)
*CorSport* 8thcivic Sponsor Join Date: Oct 2005 Location: Denver, Colorado Posts: 5,401 iTrader: 125 / 100%	Strup 2" collector and flange BCRH 2" collector then a 2.5" flange DCRH 2" collector and flange Vibrant 2.5" collector and flange __________________ www.CorSportUSA.com Performance Aftermarket Parts Honda Performance, Defined.

06-26-2008, 05:39 PM	#6 (permalink)
*CorSport* 8thcivic Sponsor Join Date: Oct 2005 Location: Denver, Colorado Posts: 5,401 iTrader: 125 / 100%	No prob. __________________ www.CorSportUSA.com Performance Aftermarket Parts Honda Performance, Defined.

06-26-2008, 05:49 PM	#9 (permalink)
NitrousG35 Mr. Cowl Induction Join Date: May 2007 Location: To Infiniti and beyond... Posts: 10,456 Wild VTEC'n Bill iTrader: 3 / 100%	A cursory look at the Hytech and SSR would seem to indicate a 2.5 collector and outlet flange diameter. __________________

07-05-2008, 11:11 AM	#17 (permalink)
*CorSport* 8thcivic Sponsor Join Date: Oct 2005 Location: Denver, Colorado Posts: 5,401 iTrader: 125 / 100%	Personally id go small header collector and any 60mm exhaust. Tai __________________ www.CorSportUSA.com Performance Aftermarket Parts Honda Performance, Defined.

06-26-2008, 01:44 PM	#2 (permalink)
Nexx Senior Member Join Date: Dec 2006 Posts: 230 iTrader: 0 / 0%	Need to search. I would post the links but the edge network on my phone blows. From my recollection: DCRH = 1.9"-2.0" BCRH = 2.25" Vibrant = 2.5" All measurements are claimed inner diameter.

06-26-2008, 05:34 PM	#5 (permalink)
asdf Senior Member Join Date: Jun 2007 Posts: 1,025 iTrader: 5 / 100%	Thank you sir.

06-26-2008, 05:43 PM	#8 (permalink)
asdf Senior Member Join Date: Jun 2007 Posts: 1,025 iTrader: 5 / 100%	Would you, or anyone, happen to know the other RH size? I'm guessing they are going to be 2.5" for the price they are.

06-26-2008, 06:03 PM	#10 (permalink)
Bboy_Burst Senior Member Join Date: Jul 2007 Location: Union City, CA Age: 21 Posts: 685 13.8@103MPH N/A iTrader: 1 / 100%	does that means the vibrant makes more hp than bcrh/dcrh/strup??

06-26-2008, 06:14 PM	#11 (permalink)
2xSi Senior Member Join Date: Jun 2008 Posts: 113 iTrader: 0 / 0%	I have a DCRH in my garage. I got only 1.875" when I measured.

07-05-2008, 04:12 AM	#14 (permalink)
Bboy_Burst Senior Member Join Date: Jul 2007 Location: Union City, CA Age: 21 Posts: 685 13.8@103MPH N/A iTrader: 1 / 100%	Question: when i had a bcrh (2.0) with stock exhaust, i was making good power. if i use a vibrant rh (2.5), would it require a better exhaust than the stock one since the collector size is bigger?

07-05-2008, 09:56 AM	#16 (permalink)
MutantCheese Senior Member Join Date: Aug 2006 Location: Edge of Insanity Age: 39 Posts: 3,251 2008 NFR S2000 iTrader: 0 / 0%	This is very interesting info. I just assumed that all aftermarket headers were at least 2.5".

07-05-2008, 12:11 PM	#18 (permalink)
redline8500 Senior Member Join Date: Aug 2007 Location: Phoenix Az Age: 21 Posts: 669 iTrader: 2 / 100%	my dc is costom from the collector back my flex broke so i tig welded a piece of 2.25 pipe and borred out the flange as well to match my evo2 and man does she pull alot harder now Last edited by redline8500; 09-02-2008 at 03:04 PM.

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