Replacing front Y pipe.. L98 o2 sensor location?
Thread Starter
Racer
Joined: Apr 2004
Posts: 378
Likes: 1
From: Fremont NH
Replacing front Y pipe.. L98 o2 sensor location?
Well it turns out my newly aquired 89 has a bad main cat.. stuff is banging around in there at idle and it's obvious the exhaust is super restricted right now.
I thought about getting rid of the main cat and replacing it with a high flow unit..but then I found this unit at Summit. (Catco CTO-9518)
It's a Y pipe and main cat that eliminates the pre cats but keeps the air tube intact..
Does anyone know if there is a provision for the o2 sensor on the drivers side built in to that Y-pipe.. pictures don't really show it so I'm hoping someone who has the unit already will let me know..
Thanks,
I thought about getting rid of the main cat and replacing it with a high flow unit..but then I found this unit at Summit. (Catco CTO-9518)
It's a Y pipe and main cat that eliminates the pre cats but keeps the air tube intact..
Does anyone know if there is a provision for the o2 sensor on the drivers side built in to that Y-pipe.. pictures don't really show it so I'm hoping someone who has the unit already will let me know..
Thanks,
Drifting
Joined: Jun 2005
Posts: 1,781
Likes: 0
From: Swanton VT 2000 Navy Blue Mettalic M6 / 1991 Auto - Steel Blue 68,500 R.I.P
I bought my cat-less y-pipe off eBay . It was nos and came from one of the Vette companies ( I can't remember which @ the moment though ). I didnt have to do anything with the o2 but plug and play type deal . The bung was we're it had to be. if the car wasn't in storage I would snap a picture or 2 for ya but you'll have to wait about another month ( I hope 
)
Good-luck
)Good-luck
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
I replaced my 87s with a catless front Y and had the installer put a new O2 sensor in. I don't remember which brand it was but it did have the bung already in place. If yours does not have a bung then it can be welded in by a muffler shop.
I think you can see the bung on the driver's side near where the pipe attaches to the exhaust manifold.
I think you can see the bung on the driver's side near where the pipe attaches to the exhaust manifold.
Safety Car
Joined: Aug 1999
Posts: 4,931
Likes: 3
From: Fort Lauderdale FL
I bought my cat-less y-pipe off eBay . It was nos and came from one of the Vette companies ( I can't remember which @ the moment though ). I didnt have to do anything with the o2 but plug and play type deal . The bung was we're it had to be. if the car wasn't in storage I would snap a picture or 2 for ya but you'll have to wait about another month ( I hope )
Good-luck
)Good-luck
Race Director
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
This pipe comes in alum or stainless and with a bung (as in Corvetteronw's pic).
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