have a 97 gsr and i just got a rsr header for it. The only problem is that the header doesnt have an o2 bung to put the o2 sensor in. What can i do so this wont be a problem? Could i just gen a hi-flow cat and have 2 bungs on it or would i have to have one welded onto it? I was planning on getting a hi flow cat soon anyway so which way would be cheaper/easier?

 

yea you can get a boss sensor welded probably. go to a muffler shop or body shop...a place that has experience with welding.

 

i meant sensor boss**

 

my friend just told me that he looked in his helms manual and it says the b18c1 engine has both the primary and secondary o2 sensor are in the catalytic convertor and the primary sensor is only on the header of the b18b. Anyone know for sure if this is true?

 

no thats not true for my 98 integra GS..same engine as the ls it has ONE sensor in the cat and the other sensor is at the base of the header. i believe its the same for all 94-01 integra rs/ls/gs why dont u just jack the car up and look for your self?????

 

oh im sorry i didnt realize you got a gsr , yea i think there are 2 o2 sensor bosses on the cat.