.:HSTuners::

08-13-2003, 12:54 PM

ok..as many of you d16y7 y know..the exhaust manifold has a built in cat. right? ok mine was cracked when i got my car. so i opted for a header. an ex one. and it came w/ a place for the o2. and i have 2 o2s. so i was thinking of getting an ex cat. and cut off the triangle flange and just weld it to my existing pipe. but i need an o2 after the cat. i think the 99-00 sis have an o2 on the cat itself. can anybody reassure me or can recommend a cat that does (that will bolt up to the ex header of course) anyones help will be greatly appreciated

*pdiggitydogg* · 08-13-2003, 02:53 PM

obd1 conversion time!

Si cats - im pretty sure theyre not like that...the o2 is after the cat's final filter/mesh

(thats all I have for now...long day and im tired...too much to think)

*AzCivic* · 08-13-2003, 04:42 PM

get an o2 simulator for the second sensor and run a straight pipe.

*pdiggitydogg* · 08-13-2003, 05:42 PM

^or build one...theres a how to in the step by step section

08-13-2003, 12:54 PM	#1
MyLoudLX Posts: n/a	catalytic converter help ok..as many of you d16y7 y know..the exhaust manifold has a built in cat. right? ok mine was cracked when i got my car. so i opted for a header. an ex one. and it came w/ a place for the o2. and i have 2 o2s. so i was thinking of getting an ex cat. and cut off the triangle flange and just weld it to my existing pipe. but i need an o2 after the cat. i think the 99-00 sis have an o2 on the cat itself. can anybody reassure me or can recommend a cat that does (that will bolt up to the ex header of course) anyones help will be greatly appreciated

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08-13-2003, 02:53 PM	#2
pdiggitydogg Yahoo Watashi wa kattaze! Join Date: May 2002 Location: Meanwhile, up in The D... Age: 41 Posts: 10,579	obd1 conversion time! Si cats - im pretty sure theyre not like that...the o2 is after the cat's final filter/mesh (thats all I have for now...long day and im tired...too much to think)

08-13-2003, 04:42 PM	#3
AzCivic Moderator Join Date: Feb 2002 Location: Az Age: 44 Posts: 3,804	get an o2 simulator for the second sensor and run a straight pipe.

08-13-2003, 05:42 PM	#4
pdiggitydogg Yahoo Watashi wa kattaze! Join Date: May 2002 Location: Meanwhile, up in The D... Age: 41 Posts: 10,579	^or build one...theres a how to in the step by step section