Hi All:
Since the Y pipe is without the pre-cat, will the CEL/SES light turned on after the installation? or you have to do something else to "cheat" the system?

Thanks in advance!!

 

I would like to know also, but will it pass emissions?

 

It will pass the emission when the engine/catalyst is hot...

 

i installed my cattman y-pipe on my 00 se cali spec like a month ago and no cel what so ever....if u going in for inspection just make sure your car is warm up and it pass without any problems..

 

tks, its good to know that and I can go ahead make the mod...

 

Yeah. You can do this mod. To keep the CEL from popping up you have to reroute the o2 sensors in the b pipe right after the cat. All those o2 sensors do is check and see if the precats are working. If you move it to after the cat it will think it is. It's not hard to rewire the o2 to after it. Just get some bungs installed in the b-pipe for about 50 bucks.

 

Is this for both the Y-pipe and header OR just for the header install only?

 

Like all the other guys have said, you'll need to have the O2 sensors (2 of them) extended and routed to be behind the main cat. The other 2 O2 sensors will be installed in the header downpipes themselves - again, they will have to be extended a bit though.

We had to extend the front 2 O2 sensors about a foot and extend the rear 2 O2 sensors about 7 feet.

You don't want to Mickey Mouse anything like the Stillen headers require... do it right and you won't have any problems.

Like I said, give Tony a call and he'll make sure it's working...

 

The Y-pipe actually only removes 1 of the 2 pre-cats... so the O2 sensor still goes before and then after the pre-cats... I don't remember having to extend my O2 sensors when I had my Y-pipe..

 

By moving the O2 sensors doesn't mean you won't be throwing the check engine light anyway. I did the O2 sensor reposition (see website pics) and was still having a problem with the light coming on. I just added the double O2 sensor simulator last night ($25) and all seems fine so far.

Trex

 

I have a bad rear o2 sensor and need to get the simulator. Where did you get the simulator?

 

Ask Cubanato (2k2Whitemaxi) He has them on this HS headers.

 

I posted bout these suckas about hmm 6 months ago if not longer... www.02similator.com I have had mine for about 8 months with no CEL and I don't have a single cat. My car flies through the emissions check- they only scan for codes If your doing the Ypipe only, I have had one for like 2 years and I never had a CEL from it. It only removes the rear precat, and repositions the bank 1 post cat 02 sensor behind the front (bank 2) precat to fool the ECU that the precat is still working This is only on the 3.0Ls thou.... dunno bout 3.5s.

 

i just got my hotshot headers last week and they said to put the 2 holes in the y pipe for the 02 sensors will this cause an cel cause ill be ****ed if i just welded the 2 holes and its gunna be screwed up also anyone have trouble with the back header i cant get mine off and the only shop that will do it cant remove the cat the bolts are rusted on good i might have to drop the engine could i do this or have a pro and if i can what do i have to do thanx

 

WSP Y-pipe on 2000 Cali-spec... does it have any O2 bungs in it? (lol, there have probably been a thousand threads about it, but a quick search didn't produce much)

So if I intend to pass an OBD-II-only emissions inspection every year and I have a WSP Y-pipe installed, should I have O2 bungs installed in the B-pipe?