Honda and Acura Model Specific Forums

jdm_94 · 11-01-2009, 08:36 PM

Some one here knows the difference between the Type R cat converter and the GSR cat converter. Can I use the Gsr cat converter in my 2000 R without any problems???

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-PaulMc- · 11-01-2009, 10:32 PM

The ITR has the upstream oxygen sensor located on the header, and downstream located on the same piece of the catalytic converter. I believe the GSR catalytic converter carries both the upstream and downstream oxygen sensors on the whole catalytic converter piece. (atleast that's true about the '98 GSR)

I don't know if it matters if you use both slots that are on the GSR catalytic converter, and leave the header slot blank, or vice versa. It may not work. You're better off just buying a universal cat that fits the California emission standards, and just have the flanges welded to it.

DC206R · 11-02-2009, 12:04 AM

Carsound CAT for the win.

OH_1fstgsr · 11-02-2009, 11:49 AM

This one might even work for you.

http://hondamarketplace.com/showthread.php?t=2669852

idrivesideways · 11-02-2009, 01:28 PM

you do realize the ITR exhaust is larger than the GSR right? as in the flange size is bigger?

-PaulMc- · 11-03-2009, 10:18 AM

Quote:

Originally Posted by idrivesideways

you do realize the ITR exhaust is larger than the GSR right? as in the flange size is bigger?

Good point..

jdm_94 · 11-03-2009, 12:53 PM

Quote:

Originally Posted by idrivesideways

you do realize the ITR exhaust is larger than the GSR right? as in the flange size is bigger?

Yes I already know but anyway I'll need to mod the cat because my car has the JDM header 2.5 collector.

irev210 · 11-03-2009, 02:18 PM

I think they are interchangeable in 2000/2001... maybe in 99, i can't remember. I know for sure that the 2000/2001 has the exact same "ITR" exhaust manifold, so there is no primary O2 on the cat, like other GSR's

supra360 · 11-03-2009, 02:42 PM

Quote:

Originally Posted by idrivesideways

you do realize the ITR exhaust is larger than the GSR right? as in the flange size is bigger?

This is Wrong, they both have 2 inch flanges.

idrivesideways · 11-04-2009, 10:29 PM

Quote:

Originally Posted by supra360

This is Wrong, they both have 2 inch flanges.

so the usdm 2.25" collector and jdm 2.5" header mate with a 2" flange?

Mr.OB*GYN_Rhett · 11-05-2009, 01:47 AM

Quote:

Originally Posted by idrivesideways

so the usdm 2.25" collector and jdm 2.5" header mate with a 2" flange?

Kinda confusing, but you are right in the other post, you cannot use a USDM cat on a JDM header unless you plan to modify the cat's flange to bolt to the JDM 2.5" collector.

jdm_94 · 11-05-2009, 09:22 AM

Quote:

Originally Posted by Mr.OB*GYN_Rhett

Kinda confusing, but you are right in the other post, you cannot use a USDM cat on a JDM header unless you plan to modify the cat's flange to bolt to the JDM 2.5" collector.

That's exactly I'm gona do!!!

11-02-2009, 12:04 AM	#3
DC206R Member Join Date: Nov 2008 Location: In a home, WA Posts: 1,355	Re: Type R Cat converter vs GSR cat converter Carsound CAT for the win. __________________ Sold to :SpAnKy_EH, Mr Knee, Bought from: Royal_ C!ty, ozzyman, xprohx, Jdm_jay

11-02-2009, 11:49 AM	#4
OH_1fstgsr Junior Member Join Date: Nov 2006 Location: Dublin, OH, USA Posts: 780	Re: Type R Cat converter vs GSR cat converter This one might even work for you. http://hondamarketplace.com/showthread.php?t=2669852 __________________ "An Action without Philosophy is a Lethal Weapon, Philosophy without Action is a Worthless." - Soichiro Honda 1999 GSR 184whp/135tq highway 33.4mpg/1993 Del Sol Si 121whp/102tq highway 38.6mpg

11-02-2009, 01:28 PM	#5
idrivesideways Member Join Date: Aug 2007 Location: Sherwood, OR, usa Posts: 3,837	Re: Type R Cat converter vs GSR cat converter you do realize the ITR exhaust is larger than the GSR right? as in the flange size is bigger? __________________ owner www.mountainviewcarpetcare.com steam carpet cleaning & grease removal for the home, office or car available in the portland - beaverton oregon area

11-03-2009, 02:18 PM	#8
irev210 Member Join Date: Nov 2001 Location: Southern cali or boston Posts: 4,956	Re: Type R Cat converter vs GSR cat converter I think they are interchangeable in 2000/2001... maybe in 99, i can't remember. I know for sure that the 2000/2001 has the exact same "ITR" exhaust manifold, so there is no primary O2 on the cat, like other GSR's __________________ MY VOUCH THREAD Click to see my vouch thread

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