SC430 HEADER INSTALL THREAD w/PICS, DYNO
Pearlpower,
Since you've messed w/ the O2 sensors, Do you know if both front O2 sensors (pre-cat) are the same and if both after-cat O2's are the same? I was loking to buy a front O2 sensor in case they had problems when they installed my headers.
Lexus did not have any in stock @ $193 ouch
, so I got a universal Bosch sensor. Ebay had a new one that I missed getting for $6 
Lexus has a different part# for right and left and I when I checked the parts store for the bosch O2 sensor, they show the same # for the front right.and left. I think 1TYTESC used a passenger side O2 for the drivers side.
I was not sre if the OEM plug was different.
My guess is that the front O2's are 4wire pre-heated sensors and the rear are not? Is this correct.
Since you've messed w/ the O2 sensors, Do you know if both front O2 sensors (pre-cat) are the same and if both after-cat O2's are the same? I was loking to buy a front O2 sensor in case they had problems when they installed my headers.
Lexus did not have any in stock @ $193 ouch
, so I got a universal Bosch sensor. Ebay had a new one that I missed getting for $6 Lexus has a different part# for right and left and I when I checked the parts store for the bosch O2 sensor, they show the same # for the front right.and left. I think 1TYTESC used a passenger side O2 for the drivers side.
I was not sre if the OEM plug was different.
My guess is that the front O2's are 4wire pre-heated sensors and the rear are not? Is this correct.
Originally Posted by GILLEXUS
Pearlpower,
Since you've messed w/ the O2 sensors, Do you know if both front O2 sensors (pre-cat) are the same and if both after-cat O2's are the same? I was loking to buy a front O2 sensor in case they had problems when they installed my headers.
Lexus did not have any in stock @ $193 ouch , so I got a universal Bosch sensor. Ebay had a new one that I missed getting for $6
Lexus has a different part# for right and left and I when I checked the parts store for the bosch O2 sensor, they show the same # for the front right.and left. I think 1TYTESC used a passenger side O2 for the drivers side.
I was not sre if the OEM plug was different.
My guess is that the front O2's are 4wire pre-heated sensors and the rear are not? Is this correct.
Since you've messed w/ the O2 sensors, Do you know if both front O2 sensors (pre-cat) are the same and if both after-cat O2's are the same? I was loking to buy a front O2 sensor in case they had problems when they installed my headers.
Lexus did not have any in stock @ $193 ouch
, so I got a universal Bosch sensor. Ebay had a new one that I missed getting for $6 Lexus has a different part# for right and left and I when I checked the parts store for the bosch O2 sensor, they show the same # for the front right.and left. I think 1TYTESC used a passenger side O2 for the drivers side.
I was not sre if the OEM plug was different.
My guess is that the front O2's are 4wire pre-heated sensors and the rear are not? Is this correct.
The sensor portion is the same for the O2 sensors. Just the length which explains the different Lexus part numbers. I went ahead and just installed new Bosch units left and right since I was in there anyhow. I hate paying for the same real estate twice. You should be fine.
Lee
Lead Lap
Joined: Nov 2004
Posts: 441
Likes: 0
From: Alberta
Originally Posted by GILLEXUS
Pearlpower,
Since you've messed w/ the O2 sensors, Do you know if both front O2 sensors (pre-cat) are the same and if both after-cat O2's are the same? I was loking to buy a front O2 sensor in case they had problems when they installed my headers.
Lexus did not have any in stock @ $193 ouch , so I got a universal Bosch sensor. Ebay had a new one that I missed getting for $6
Lexus has a different part# for right and left and I when I checked the parts store for the bosch O2 sensor, they show the same # for the front right.and left. I think 1TYTESC used a passenger side O2 for the drivers side.
I was not sre if the OEM plug was different.
My guess is that the front O2's are 4wire pre-heated sensors and the rear are not? Is this correct.
Since you've messed w/ the O2 sensors, Do you know if both front O2 sensors (pre-cat) are the same and if both after-cat O2's are the same? I was loking to buy a front O2 sensor in case they had problems when they installed my headers.
Lexus did not have any in stock @ $193 ouch
, so I got a universal Bosch sensor. Ebay had a new one that I missed getting for $6 Lexus has a different part# for right and left and I when I checked the parts store for the bosch O2 sensor, they show the same # for the front right.and left. I think 1TYTESC used a passenger side O2 for the drivers side.
I was not sre if the OEM plug was different.
My guess is that the front O2's are 4wire pre-heated sensors and the rear are not? Is this correct.
Lead Lap
Joined: Nov 2004
Posts: 441
Likes: 0
From: Alberta
Originally Posted by GILLEXUS
Lee, thanks for the info, I'm I correct that the front and rear O2's are different?
Hollywood, why would you want to bypass the O2 sensors??
Hollywood, why would you want to bypass the O2 sensors??
Originally Posted by Hollywood
Just the ones for the cat check so you can delete the cats, u need the ones that fine tune the AF's in the headers.
Lead Lap
Joined: Nov 2004
Posts: 441
Likes: 0
From: Alberta
Originally Posted by GILLEXUS
Wouldn't that set off a CEL since it is an OBD II system?
Originally Posted by powmax
Originally Posted by Pearlpower
The sensor portion is the same for the O2 sensors. Just the length which explains the different Lexus part numbers. I went ahead and just installed new Bosch units left and right since I was in there anyhow. I hate paying for the same real estate twice. You should be fine.
Lee
Lee
I found this site which gives the lenth of the O2 wire, well that is for the walker brand. Not sure if this is the same lenth for OEM O2's..
Pass. side O2 17", driver side 10" and after cat. 27"
http://www.automedicsupply.com/catal...4.3L#Location1
Pole Position
Joined: Jul 2003
Posts: 370
Likes: 1
From: Pennsylvania
yes straight pipe the third cat. as in goto a muffler shop and they will cut before and after the cat and weld in a straight piece of pipe (no o2 senors after the 3rd (useless) cat 
better mpg, more power all for under 70$ cant beat it
better mpg, more power all for under 70$ cant beat it
EV ftw!!!
Joined: Nov 2002
Posts: 9,035
Likes: 602
From: Lake Ontario
Hey Lee, just ran into this thread and still cannot believe the amazing results you got with the headers install! 
I had already decided to do this mod next year, but after reading your results, I want to do it now! Damn!
I have a freer flowing exhaust - bigger pipes (2.25 inch), eliminated all three resonators, added in an X-pipe, so I am hoping to get even better results with the headers!
I had already decided to do this mod next year, but after reading your results, I want to do it now! Damn!
I have a freer flowing exhaust - bigger pipes (2.25 inch), eliminated all three resonators, added in an X-pipe, so I am hoping to get even better results with the headers!