Catalytic converter suggestions, no pipes needed.

ciper · 07-25-2002, 09:11 PM

I tried searching for old posts, and either I would end up with 1000 irrelevant posts or like 10 that only suggest a high flow cat but not what type. Maybe Im not using the right words.

Anyways, my plan is to get the header from tech works engineering a slightly used wrx muffler (with 100 some miles) and a high flow cat plus the expertise of a local exhaust shop to build me up something good.

Im looking for a good high flow cat. Obviously it doesnt need to be subaru specific. Any suggestions? Im not looking for ultimiate wiz bang flow here, this is on an NA 2.2l

Im not cheap but Id like to get a good deal. Thanks for your suggestions.

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yamarocket630 · 07-25-2002, 09:25 PM

check out summitracing.com

HndaTch627 · 07-26-2002, 04:44 AM

ciper i've always had good luck with catco cats...in fact i have 2 that are 2 1/2" inch but i had to cut them up pretty bad to get them out. check them out.

jeremy

p.s.: if you live in a emissions state get a 3 way.

Patrick Olsen · 07-26-2002, 06:30 AM

In addition to the direct-fit hi-flow cat, Random Technology makes all sorts of universal fit cats. Them and Catco are pretty much the two to check out. Oh, and Brullen also makes universal cats.

Pat Olsen
'97 Legacy 2.5GT sedan

BOY · 07-26-2002, 01:02 PM

Catco absolutely! For under $100 shipped to your door you cant beat them. Don't fall into the brand name game. the Random tech cats are good, don't get me wrong, but not for that much $$.

wistful · 07-26-2002, 01:21 PM

Tengo un Catco en mi coche. Me gusta mucho!

Don

ciper · 07-26-2002, 01:44 PM

Miraré catco. Gracias por la sugerencia

HndaTch627: a three way?

BOY · 07-26-2002, 02:10 PM

3 way, uh oh

ciper · 07-26-2002, 03:24 PM

Okay, I will probably order this from summit racing. They have so many choices though. The only thing I know for sure is the inlet/outlet diameter. What does length have to do with it? I know I dont need an air pump inlet, but which item should I get? Is bigger better?

edit: Found a cool page! http://www.discountconverter.com/dea...20PRICE%20LIST

I was thinking about model 2605 as shown

2.25 inlet, 2.25 outlet and 16 1/2 inch. Summit has them in stock for 64.39 plus 7.95 handling. Is that good? Is this the right item to choose?

My real question is that tube, is that meant to suck air from the atmosphere or is this intended for a smog pump?

HndaTch627 · 07-27-2002, 04:36 AM

that's the right item...the reason you need a three way is because our cars have no EGR system to control NOx production, therefore you need a catalyst that is Platnium, Palladium, and Rhodium(the Rhodium stores oxygen on decelleration)...and if you like in a pollution controlled state they will soon START monitor NOx output of vehicles because to be honest, it's more deadly then carbon monoxide(caused by a faulty catalyst)....you are going to have the AIR tube access port but it just stays capped. the 2 1/4" will provide good flow w/o robbing too much top end and to be honest i don't think you'd even see a P0420(catalyst effiency) code with a 2 1/4. Good luck ciper.

FWIW the stock cats are just in 2 halves, not 2 cats, first takes care of HC and CO, the second AFAIK controls the NOx output.

GOod luck

jeremy

07-25-2002, 09:11 PM	#1
ciper Scooby Guru Member#: 15543 Join Date: Feb 2002 Location: san francisco, ca Vehicle: 90BJ Legacy LS ABS AWD 946 Rio Red Jpn built	Catalytic converter suggestions, no pipes needed. I tried searching for old posts, and either I would end up with 1000 irrelevant posts or like 10 that only suggest a high flow cat but not what type. Maybe Im not using the right words. Anyways, my plan is to get the header from tech works engineering a slightly used wrx muffler (with 100 some miles) and a high flow cat plus the expertise of a local exhaust shop to build me up something good. Im looking for a good high flow cat. Obviously it doesnt need to be subaru specific. Any suggestions? Im not looking for ultimiate wiz bang flow here, this is on an NA 2.2l Im not cheap but Id like to get a good deal. Thanks for your suggestions. * Registered users of the site do not see these ads.

07-26-2002, 03:24 PM	#9
ciper Scooby Guru Member#: 15543 Join Date: Feb 2002 Location: san francisco, ca Vehicle: 90BJ Legacy LS ABS AWD 946 Rio Red Jpn built	Okay, I will probably order this from summit racing. They have so many choices though. The only thing I know for sure is the inlet/outlet diameter. What does length have to do with it? I know I dont need an air pump inlet, but which item should I get? Is bigger better? edit: Found a cool page! http://www.discountconverter.com/dea...20PRICE%20LIST I was thinking about model 2605 as shown 2.25 inlet, 2.25 outlet and 16 1/2 inch. Summit has them in stock for 64.39 plus 7.95 handling. Is that good? Is this the right item to choose? My real question is that tube, is that meant to suck air from the atmosphere or is this intended for a smog pump? Last edited by ciper; 07-26-2002 at 03:50 PM.

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07-25-2002, 09:25 PM	#2
yamarocket630 Scooby Specialist Member#: 9436 Join Date: Aug 2001 Chapter/Region: MWSOC Location: My member# is lower than yours Vehicle: 05 Saab 9-5 Aero	check out summitracing.com

07-26-2002, 04:44 AM	#3
HndaTch627 Scooby Guru Member#: 6551 Join Date: May 2001 Chapter/Region: MWSOC Location: Carol Stream, IL Vehicle: '01 GC8 Dinged STM '09 Concours 14 ABS Black	ciper i've always had good luck with catco cats...in fact i have 2 that are 2 1/2" inch but i had to cut them up pretty bad to get them out. check them out. jeremy p.s.: if you live in a emissions state get a 3 way.

07-26-2002, 06:30 AM	#4
Patrick Olsen NASIOC Supporter Member#: 120 Join Date: Jul 1999 Chapter/Region: AKIC Location: Where the Navy sends me... Vehicle: 1997 Legacy 2.5GT QuickSilver Metallic	In addition to the direct-fit hi-flow cat, Random Technology makes all sorts of universal fit cats. Them and Catco are pretty much the two to check out. Oh, and Brullen also makes universal cats. Pat Olsen '97 Legacy 2.5GT sedan

07-26-2002, 01:02 PM	#5
BOY NASIOC Supporter Member#: 232 Join Date: Sep 1999 Chapter/Region: MWSOC Location: Ft Wayne, IN Vehicle: 99 RS-T RIP 02 Forster-S	Catco absolutely! For under $100 shipped to your door you cant beat them. Don't fall into the brand name game. the Random tech cats are good, don't get me wrong, but not for that much $$.

07-26-2002, 01:21 PM	#6
wistful Scooby Specialist Member#: 745 Join Date: Jan 2000 Location: Royal Oak, MI Vehicle: 2004 STi Java Black Pearl	Tengo un Catco en mi coche. Me gusta mucho! Don

07-26-2002, 01:44 PM	#7
ciper Scooby Guru Member#: 15543 Join Date: Feb 2002 Location: san francisco, ca Vehicle: 90BJ Legacy LS ABS AWD 946 Rio Red Jpn built	Miraré catco. Gracias por la sugerencia HndaTch627: a three way?

07-26-2002, 02:10 PM	#8
BOY NASIOC Supporter Member#: 232 Join Date: Sep 1999 Chapter/Region: MWSOC Location: Ft Wayne, IN Vehicle: 99 RS-T RIP 02 Forster-S	3 way, uh oh

07-27-2002, 04:36 AM	#10
HndaTch627 Scooby Guru Member#: 6551 Join Date: May 2001 Chapter/Region: MWSOC Location: Carol Stream, IL Vehicle: '01 GC8 Dinged STM '09 Concours 14 ABS Black	that's the right item...the reason you need a three way is because our cars have no EGR system to control NOx production, therefore you need a catalyst that is Platnium, Palladium, and Rhodium(the Rhodium stores oxygen on decelleration)...and if you like in a pollution controlled state they will soon START monitor NOx output of vehicles because to be honest, it's more deadly then carbon monoxide(caused by a faulty catalyst)....you are going to have the AIR tube access port but it just stays capped. the 2 1/4" will provide good flow w/o robbing too much top end and to be honest i don't think you'd even see a P0420(catalyst effiency) code with a 2 1/4. Good luck ciper. FWIW the stock cats are just in 2 halves, not 2 cats, first takes care of HC and CO, the second AFAIK controls the NOx output. GOod luck jeremy